ONGC Chemical Engineering Technical Questionsaaa

ONGC Chemical Engineering Technical Questions,ONGC Grduate Trainees previous years solved question papersMost of the questions are from previous GATE papers, Specially numerical questions.

1. Sherwood Number Is the ratio of? Convective Mass transfer coefficient to Diffusive Mass transfer coefficient. ( Sh = KL/D)

2. Catalyst in the manufacture of HNO3? Pt-Rh catalyst

3. Process used to convert Black liquor to white liquor? ANS:

4. What is Capitalised cost?

5. Which type of agitator will be used for viscous liquids?

6. Cavitation in pumps can be avoided by? Maintaining high vapour pressure.

7. What is Bode Criteria? A feedback control system is unstable if amplitude ratio of corresponding open loop transfer function is larger than 1 at the cross over frequency.

8. After absorption of Ammonia in water how it can be recovered?

9. According to Collision theory How “T” and “K” are related? K proportional to T^1/2

10. Which law gives about the generation of EMF?

11. What is the Change in entropy in mixing two components?

12. Glass etching can be done by using?

13. What is Plancks law, Kirchoffs law and Stefan boltzman law ?

14. What is the reason for not using saturated steam in evaporator?

15. Order of reaction for which the size of MFR is bigger than PFR?

16. How optimum reflux ratio can be chosen?

17. For gaseous reactions which reactor will give best result?

18. Penetration theory in Mass transfer?

19. What is the maximum allowable pressure drop on tube side in shell and tube heat exchangers?

20. For exothermic reactions as the temperature decreased ,how rate of reaction changes?

21. Corner Frequency corresponds to angle?

22. During Condensation which property does not change?

23. If Pr>1, then heat transfer confined to? Viscous sub layer

24. Minimum offset and oscillation occur with which type of controller?

25. Head developed by a pump depends on?

26. In cooling towers efficiency can be increased by ?

27. Ultrafine grinding uses which mechanism?

28. Composition of synthesis gas?

29. Aniline point of diesel shows?

30. Three unequal sized mixed flow reactors of volume 5L, 10L, 15L are arranged in which order for reactions of order n>0?

31. For natural convection Nusselt number is the function of?

32. Which mechanism is used in Fluid energy mill?

33. Film coefficient of heat transfer defined as?

34. Petroleum coke is made by residue by which process?

35. Chemical used in the test of COD?

36. Product of reaction between acetylene and chlorine?

37. For first order reactions, if thiele modulus is 10, then effectiveness factor is? 0.1

38. Graph between 1/C0 vs t is straight for reactions of order? 2

39. Which type of arrangement used for cold and viscous feed? Backward feed

40. Superheated steam is not used in evaporator dur to? Low heat transfer coefficient

41. Byproduct in the production of phosphoric acid ? Gypsum

42. The equivalent diameter for flow through rectangular duct of width B and Height H is? 2(BH)/(B+H)

43. What is dead time in process control?

44. For gas phase reaction 2A->B, feed consists of 80 mole% A and 20 mol% inerts. If the conversion of A at the reactor exit is 50%, then CA/CA0 at the reactor outlet is?

45. Numerical on Pitot tube .

46. For exothermic reactions under adiabatic condition conversion goes through? Reaches maximum

47. View factor for concentric Spheres of radius R2 for smaller and R1 for larger sphere is?

48. Chemical Used in the test of COD?

49. LMTD correction factor?

50. H2S and S can be removed by using?

51. Newtons law of motion , analogous to what law in mass transfer?

ONGC General Awareness Questions

1. Untouchability speech is given by ?

2. CAG administration and rules are under Article?

3. Who inspired from R Tagores Geetanjali?

4. Badami caves built by? Chalukyas

5. Supreme court writs under article?

6. Election dispute in the election of vice president resolved by?

7. If both the houses are absent then the president ordinance valid for how many days?

8. Order of importance among, chief justice of india, election commissioner,cabinet minister, cabinet secretary?

9. Oxygenated blood is in which side of Heart?

10. Good Cholesterol? HDL

11. Blood test after fasting gives?

12. Flag bearer in the ending ceremony of Olympics?

13. Last NAM summit held in?

14. Match the followingOrissa- ParadipMaharashtra- Jawahar lal Nehru PortGujarat- Kandla

15. Match the following, about projects and rivers?

16. Shakespears novel in which a murder by poison ?

17. Blue vitriol?

18. Which city lies in two continents?

19. Seven sisters of north east?

20. What is sierra leone?

21. Largest uranium reserves in the World?

22. Places with same rain fall are connected by? isohytes

23. Who had written stories on partition of India? R.K.Narayan

24. Who is the emerging player by ICC?

25. Which is not an epic?

26. Composition of solder?

27. Food poison caused by?

28. Ascending order of speed among Floppy , RAM, Cache, Harddisk?

29. Red blood cells are abundant in?

Wishing All the best and good luck.

Sathish

ONGC GT 2012 Chemical Engineering CODE 12,ONGC chemical engineering questions asked in ONGC Graduate Trainees recruitment written test examination on Nov 2012,ONGC written test pattern,selection procedure,technical questions asked,ONGC candidates experince.........

1- film coefficient of heat transfer- thermal conductivity/film thickness

2- Petroleum coke is made by Residue by- Pyrolysis

3- correction factor for single tube pass-

4- Oxygen demand- COD>BOD

5- A unit step response to transfer func G=1/(s^2+1)-

6- phase lag- 45 deg

7- chemical used in the test of COD- both options KMnO4 and K2Cr2O7 are rite but K2Cr2O7 mostly preferd over KMnO4.

8-By product of wet process for the production of phosphoric acid- Gypsum

9- for Pr>1 conduction will be within viscous sublayer

10- mass transfer and momentum transfer- Sherwood No. Sh

11- Three unequal sized mixed flow reactor in series with volume 5L, 10L, 15L is arranged as-

12-fluid energy mill- attrition

13-for black body absorptivity and emmisivity equivalence-

14- view factor for concentric spheres of radius R2 for smaller sphere and R1 for larger one is- R2/(R1+R2)

15- ficks law for- molecular diffusion

16- superheated steam is not used for heating in HE due to- less heat transfer film coefficient

17- limiting reactant question-

18- rxn between acetylene and chlorine- vinyl chloride is formed

19- (synthesis gas)- CO+H2

20- evaporator arrangement for viscous fluid- backward feed

21- for cold and viscous- mixed feed

22- pump NPSH is- Head + Vapour pressure of Liquid.

23- cooling tower question- all options were correct

24- wet bulb temperature- lies between dew point and dry bulb temperature i.e. 40*C-60*C

25- 1/c0 vs t curve straight line for- 2nd order reaction

26- laminar flow question- there is flow in streamline no flow across.

27- After absorption ammonia is removed from- Distillation

28- on incresing temperature relative humidity- increases

29- aniline point for- aromatic content of diesel

30- catalyst used in the production of Nitric acid 97%- platinum/rhodium

31- Heat engine efficiency and temp diff 60*C now given find the temp of heat source and sink- 325& 265*C

32- For 1st order rxn in porus catalyst thiele modulus is 10 then effectiveness factor is- 0.1

33- For gas phase rxn 2A-->B, feed consists 80 mole% A and 20 mole% inerts. if the conversion of A at the reactor exit is 50% then Ca/Ca0 at reactor outlet- 5/8

34- A pulse tracer is introduced in an ideal CSTR at time t=0,time taken for the exit conc. of the tracer to reach of of its initial value- 0.693*t

35- A batch adiabatic reactor with an initial temp. of 373K is used for the rxn A-->B. Assume heat of rxn is -1kJ/mol at 373K and heat capacity of both A and B is constant 50J/mol.K. The temp rise for the conversion of 0.5- 10*C

36- Moles of Air used for complete combustion of C3H8-

37- Molar composition of a gas is 10% H2, 10% O2, 30% CO2, and balance H2O. Now 50% H2O condenses then the final mole % of H2 in the gas on dry basis- 20%

38- A pitot tube indicates 5cm of water when it is used for measuring velocity of air. velocity of air in m/s is- 28.2

39- real gas approaches ideal behavior when- pressure<1 and Temp>1

40- Rxn between Gleceride and Aldehyde- Transesterification

41- An alkaline solution is used to reduce the conc. of CO2 in a stream from 10% to 0.1% by absorption with irreversible chemical rxn. The overall NTU based on gas phase is- 4.605

42- Multiple effect evaporator has capacity to process 4000kg of solid caustic soda per day when it is concentrating from 10% to 35% water. The water evaporated in kg/day is- 27,500

43- Heat is transfered through three layer of different thermal conductivity- 20.27 kW/hr.m2

44- Optimum reflux ratio depends on- Costing of Column

45- Converting Black Liquor to White Liquor- drying, adding caustic with dilution

ONGC general awareness questions with answers

1) As per the data released in March 2012,India exports registered how much growth in January 2012 at $25.34 billion with the demand from the western markets remaining weak?1) 10.1 Percent2) 8.4 Percent3) 9.8 Percent4) 12.2 Percent

2) The union cabinet on march 1,2012 approved the proposal to bring down the quantum of subsidy on decontrolled fertilizers fro 2012-13.Which of the following are those fertilizers?1) Phosphatic (P)2) Potassic (K)3) Nitrogenous (N)4) Only 1 and 2

3) in an innovative mechanism to partally make up for the short fall in the disinvestment target set for the current fiscal,the union cabinet in March 2012 approved buy-back of the centre's equity by cash-rich public sector undertakings.what was the target ?1) Rs 20,000 Crore2) Rs 30,000 Crore3) Rs 40,000 Crore4) Rs 50,000 Crore

4) A commerce ministry statement in march 2012 showed that imports of sensitive items,went up by 44.7 percent to Rs 75,948 Crore in April-Dec. 2011 from Rs 52,492 Crore in the year ago period.which items are in reference here?1) Fruits2) Vegetable3) Edible oils4) All of the above

5) Spice Jet on March 2, 2012 said its promoters agreed to infuse Rs 100 Crore fresh funds into the airline in exchange for an additional equity of 42.9 million shares,aggregating to1) 5 percent2) 10 percent3) 15 percent4) 20 percent

6) The directorate general of foreign trade(DGFT) issued a notification in March 2012 prohibiting export of which of the following commodities with immediate effect?1) Onion2) Sugar3) Cotton4) Pulses

7) Global mining giant Rio Tinto announced Plans to invest $ 2 billion in iron ore and diamond mining projects in Madhya Pradesh and1) Rajasthan2) Orissa3) West Bengal4) Jharkhand

8) Which of the following in March 2012 joined hands to set up India's first $2 billion infra structure Debt. Funds(IDF)?1) ICICI Bank2) Citi Finanacial3) Bank of Baroda and life Insurance Corporation4) All of the above

9) The PMO office in March 2012 stepped in to the fast track the development and use of inland water transport(IWT) which opens the water route for movement of bulk cargo such as1) Coal

2) Food grains3) fertilizers4) All of the above

10) During Feb. 2012 Indian companies invested around how much abroad with reliance industries Ltd. and Tata Sons emerging as major investors?1) $ 1.01 billion2) $ 2.01 billion3) $ 3.01 billion4) $ 4.01 billion

11) The RBI on March 9,2012 reduced the cash Reserve Ratio(CRR) by how many basis points with effect from March 10,2012 ?1) 25 points2) 50 points3) 75 points4) 100 points

12) As per the data released in March 2012, imports grew at a faster rate year-on-year at $39.8 billion, Translator into a trade deficit of $15.2 billion during the month.What was the % of this faster rate?1) 12.4 Percent2) 16.2 Percent3) 20.6 Percent4) 26.8 Percent

13) Ranbaxy Laboratory in March 2012 announced the opening of its new production facility in which African countries,which would help it access the African nation $1 billion pharmaceutical market ?1) Morocco2) Rwanda3) republic of Congo4) Botswana

14) Telecom company Etisalat, in March 2012 announced to have started proceedings for winding up operations of its Indian venture. Etisalat is based in which of the following countries ?1) UAE2) Saudi Arabia3) Malaysia4) Iran

15) The International Air Transport (IATA) in March 2012 urged the Indian Govt. to address which of the following issues to remove the shackles of the available sector?1) High Fuel tax2) High Service Tax3) Cost and Infrastructure4) All of the above

16) In a major relief to the airlines industry, the union Budget 2012-13 presented in the Parliament on March 16,2012, proposed to allow it to raise funds through external commercial borrowings worth how much for a year?1) $1 billion2) $2 billion3) $5 billion4) $10 billion

17) Giving Push to the infrastructure sector in the budget, Finance minister Pranab Mukherjee, in March 2012 allowed financial institutions to raise about how much from Tax-free bonds and opening decks for larger private participation ?1) Rs 30,000 crore2) Rs 50,000 crore3) Rs 60,000 crore4) Rs 75000 crore

18) Which bank in March 2012 announced its share holders to have approved Rs 7900 crore capital infusion by the government?1) Punjab National Bank2) Indian overseas Bank3) State Bank India4) Oriental bank of commerce

19) Tata Motors owned Jaguar Land Rover 2012 ti have finalized cherry Automobile company as partner to form an equal Joint Venture ?1) Japan2) Brazil3) China4) South Africa

20) In a significant move The Reserve Bank of India in March 2012 tightened the rules for lending against ----- jewellery by Non- Banking finance company (NBFC's)1) Diamond2) Gold3) Silver

4) All of the above

21) The Fifth Edition of the World Future Energy Summit was held ina) Abu Dhabib) New Delhic) Tehrand) Dhaka

Ans a

22) Planning Commission of India on January 18,2012 approved Rudrasagar development scheme.The Scheme is related toa) Tripurab) Assamc) Manipurd) Sikkim

Ans a

23) The Board of approval (BoA) under the Commerce ministry on January 24,2012 approved the proposal of this company to set up a special economics zone( SEZ) at Indore in Madhya Pradesh, Identify the Company ?a) Reliance Industryb) Tata Consultancy services( TCS)c) Hero Motorsd) Infoysys

Ans b

24) Scientists identified a new gene in maize Plants called ?a) Meg 1b) Meg 2c) Meg 34) Meg 4

Ans a

25) Researches discovered new earthworm species in Port Blair. What is the name of the new Species ?a) Moniligaster ivaniosib) Annelidac) Nematodad) Onychophora

Ans a

26) Scientists recently developed a new wireless device to detect the Presence of termites. Consider the following statement-1) when the new device detects the presence of termites,it sends an SMS or email to a pest Control firm.2) The Device is made of tiny sensor, even smaller than a fingernailChoose the Right optiona) Both 1 and 2 Correct

b) Only 1 is Correctc) Only 2 is Correctd) Neither 1 not 2 is Correct

Ans a

27) According to the draft Sports Policy of this State Govt released on Jan 11,2012, a Special life-time achievement award in memory of G.V.Raja, the Founder-President of the State Sports Council is to be instituted.Which State is being referred to ?a) karnatakab) keralac) Tamil Nadud) Andhra Pradesh

Ans b

28) Which team defeated Uttarakhand in the Men's category to win the National title for the fourth time, in the 60th Senior national Volleyball Championship at Raipur on Jan 11, 2012 ?a) Keralab) Andhra Pradeshc) West Bengald) Tamil Nadu

Ans a

29) Which team extended their hegemony by defeating Kerala 25-12, 25-14, 25-16 in a one sided final in the women category at the 60th Senior National Volley-ball Championship ?a) Punjabb) Servicesc) Railwaysd) Delhi

Ans c

30) This Footballer was awarded the 2011 FIFA Ballon d'Oran January 9, 2012 in Zurich. He Won the award for the third Consecutive year for the world's outstanding footballer.Identify the Footballer ?a) Cristiano Ronaldob) Xavic) Sergio Ramosd) Lionel Messi

Ans d

31) State-run Northern Coalfields(NCL) agreed to surrender land required to mine two blocks attached to the Sasan ultra mega power plant to which of the following Companies giving the Company the benefit over Rs 6000 crore over the life of the Venture ?1) Reliance Power2) Adani Power3) Birla Power Solutions4) DLF Power

Ans a

32) Which car took home the Crown of Indian car of the Year 2012 in Jan 20121) Toyota Etios liva2) Maruti Suzuki Swift3) Hyundai Verna4) Hyundai Eon

Ans b33) As per the Wholesale Price Index, Published by the govt on Jan 16,2012.Reduced food Prices Caused the inflation to dip to a year low at what percent in December 2011 ?a) 7.47%b) 7.65%c) 6.33%d) 5.41%

Ans c

34) Maldives Authorities allowed male international airport development and insurance charges from passengers,nearly a month after a local court barred the Bangalore-based company from doing so.Name the operator?a) GMR Infrastructureb) International Air Transportc) Fraport AGd) DIAL

Ans a

35) Which French Construction major entered the Indian market by buying out 100 percent stake in NAPC, a Chennai-based construction Company?a) Sinopec Engineeringb) Uhdec) Vincid) Snamprogetti

Ans c

36) India Signed MOU (Memorandum of Understanding ) on Tourism with ASEAN on January12,2012.The agreement took place in-a) Manadob) Jakartac) Malaysiad) Manila

Ans a

37) Pravasi Bhartiya Divas-2012 was held in Jaipur.Jaipur is the Capital of which one of the following states?a) Rajasthanb) Biharc) UPd) Madhya Pradesh

Ans a

38) India and Japan on Jan 12,2012 agreed to enhance their cooperation in the ................. Sector.a) Infrastructureb) Tourismc) Road and Transport d) Coal and Mining

Ans a

39) He was Conferred the first S.K Singh Award for excellence in the Indian Foreign services in Jan 6,2012. Identify the diplomata) Ranjan Mathaib) Shivshankar Menonc) D.Bala venkatesh Vermad) K.Raghunath

Ans c

40) Name the auto making company which launched three new variants of the Eon-D-Lite Plus,Era Plus and Magna Plus in the Indian market on jan 2012 ?a) Tata Motorsb) Hyundai Motors Indiac) Volkswagend) Maruti Suzuki

Ans b

41) Who was presented the Mahatma Gandhi International Awards for Peace and Reconciliation on Jan 4,2012 the fourth day of the tenth day Kalachakra initiations ?a) Tibetan Spiritual leader, Dalai Lamab) South African leader Nelson Mandelac) Tanzania's Julius Nyerered) Burmese Pro-democracy leader Aung san suu kyi

Ans a

42) European Union agreed in Principle to ban import of Iranian Crude oil.Consider the following statement:1) The European Union(EU) is one of Iran's biggest markets for oil.2) The EU is a Political and economical union of 27 member statesChoose the Right optiona) Both 1 and 2 are correctb) Only 1 is Correctc) Only 2 is Correctd) Neither 1 nor 2 is correct

Ans a

43) The Israel-Palestine talks, in the first week of Jan 2012 were held in Amman.Amman is the Capital ofa) Jordan

b) Syriac) Iraqd) Iran

Ans a

44) Maldives on Jan 4,2012 lifted ban on Spas in the upmarket tourist destination .Consider the following statement:1) The Tourism industry is an important foreign exchange earner in the Maldives.2) Maldives in 2011 received more than 850000 touristChoose the Right Optiona) Both 1 and 2 are correctb) Only 1 is Correctc) Only 2 is Correctd) Neither 1 nor 2 is correct

Ans a

45) India and which country on March 1,2012,decided to open a new chapter in bilateral cooperation by agreeing to undertake joint operations against pirates and sharing technological know how on seabed research?1) China2) Japan3) Russia4) New Zealand

Ans 1

46) A meeting at the prime minister office on Feb 29,2012, decided to increase the total expenditure on health to what percent of the GDP from the current 1.4 percent by the end of the coming 12th plan period?1) 2.0 Percent2) 2.5 Percent3) 3.0 Percent4) 4.0 Percent

Ans 2

47) India and which country recently announced to have resolved their longstanding issues of payments for export shipment?1) Iran2) Syria3) Lebanon4) Pakistan

Ans 1

48) The indigenously development advanced light-weight torpedo and the Akash missile system was on March 3,2012,handed over to the Navy and the Indian Air force respectively at a function in1) Visakhapatnam2) Hyderabad3) Pune4) Kolkata

Ans 2

49) The golden Jubilee celebrations of Afro-Asian Rural development organization were held in New Delhi in March 2012.The AARDO president hails from 1) India2) Egypt3) Morocco4) South Africa

Ans 2

50) The National Association of Street vendors of India( NASVI ) and Nidan,an organization that supports unorganized workers,were on March 29,2012 honored with the skoll Award for social entrepreneurship by the skoll foundation in1) Toronto2) oxford3) Paris4) Frankfurt

Ans 2

51) Union minister for Rural development, Drinking Water and sanitation Jairam Ramesh in March 2012 announced a national award for sanitation and water in the name of Maharashtrian saint sant1) Romesh Hatangadi2) Gadge Baba3) Suresh Bhagwan4) Shiv sagar Baba

Ans 2

52) Who among the following, on march 11,2012,said he will be "Very Sad" if India boycotts the London Olympics following the row over sponsorship of the event by Dow Chemicals, linked to the Bhopal gas tragedy?1) Barack Obama2) David Cameron3) Manmohan singh4) Hillary Clinton

Ans 2

53) The high level safety review committee recently submitted its report to the Ministry of railways with a Number of recommendations,who is the chairman of this committee ?1) C.Rangarajan2) Lalu Yadav3) Anil Kakodkar4) Harish Rawat

Ans 3

54) In an important development on March 12,2012, the supreme court issued notices to nsix ministers and eight Indian Administrative services officers from

1) Andhar Pradesh2) Karnataka3) Kerala4) Tamil Nadu

Ans 1

55) Which of the following was pointed by the union Finanace minister Pranab Mukherjee in March 2012 as one of the major challenges facing public sector banks(PSB) in emerging as potential global tenders?1) Human Capital deficit2) Human Capital deficit3) Innovation deficit4) Technology deficit

Ans 1

56) The Centre told the Supreme Court in March 2012 that it was Probing into the allegations that the former Chief Justice of India and his relatives amassed assets disproportionate to their Known sources of income.Who is the chief Justice in reference here?1) K.G.Balakrishna2) S.H.Kapadia3) Altamas Kabir4) Dalveer Bhandari

Ans 1

57) The Functioning of both houses of Parliament was disrupted on March 13,2012,When members demanded that India support the resolution to be moved by------ against sri lanka at the U.N Human Rights Council.1) U.S.A2) France3) Norway4) All of the above

Ans 4

58) Noted critic Namvar Singh in March 2012 presented the Jnanpith Award to eminent hindi author Amar Kant at a Special ceremony in1) New Delhi2) Lucknow3) Allahabad4) Patna

Ans 3

59) Increasing the fare for the first time in eight years, the railway budget for 2012-13, presented before the parliament on March 14,2012,envisages how many new trains?1) 902) 1133) 1454) 166

Ans 2

60) Okram Ibobi Singh was sworn as chief minister for the third Consecutive term of which state in March 2012?1) Arunachal Pradesh2) Nagaland3) Manipur4) Tripura

Ans 3

61) Governor Shivraj V.Patil in March 2012 administered the oath of office and secrecy to Parkash Singh Badal,Who took over as the chief minister of Punjab for a record- time1) Fifth2) Third3) Fourth4) Seventh

Ans 1

62) The finance ministry, on March 15,201, gave it's nod for the labour and employment ministry to fix the rate of interest payable to EEPF sub-subscribers at which percentage for2011-12?1) 8.25%2) 8.75%3) 9.25%4) 9.50%

Ans 1

63) The Cabinet of which state in march 2012 decided to give a grant of rS. 30,000 to high school pass Muslims girls for perusing their education and marriage?1) Uttar Pradesh2) West Bengal3) Andhra pradesh4) Delhi

Ans 1

64) Which of the following Chief ministers of India figures on the cover of the Time magazine in March 2012 which prasied him in an article for the development of the State?1) Mamta Banarjee2) Nitish Kumar3) Ashok Gehlot4) Narendra Modi.

Ans 4

65)The owner of an electronics shop charges his customer 22% more than the the cost price. If a customer paid Rs. 10,980 for a DVD Player, then what was the cost price of the DVD Player?(1) Rs. 8,000(2) Rs. 8,800(3) Rs. 9,500(4) Rs. 9,200

(5) None of these (Ans)

66)Ms Suchi deposits an amount of Rs. 24,000 to obtain a simple interest at the rate of 14 p.c.p.a. for 8 years. What total amount will Ms Suchi get at the end of 8 years?(1) Rs. 52,080(2) Rs. 28,000(3) Rs. 50,880 (Ans)(4) Rs. 26,880(5) None of theseExplanation : Total Amount= Rs. 24000 + 24000 x 14 x 8/100 = Rs. 50880

67)A canteen requires 112 kgs of wheat for a week. How many kgs of wheat will it require for 69 days?(1) 1,204 kgs(2) 1,401 kgs(3) 1,104 kgs (Ans)(4) 1,014 kgs(5) None of theseExplanation : 112/7 x 69 = 1104 kg= Reqd. quantity of wheat 68)The cost of 4 Cell-phones and 7 Digital cameras is Rs 1,25,627. What is the cost of 8 Cell-phones and 14 Digital cameras?(1) Rs. 2,51,254 (Ans)(2) Rs. 2,52,627(3) Rs. 2,25,524(4) Cannot be determined(5) None of theseExplanation : 4x + 7y = 125627] x 2∴ 8x + 14y = 251254

69)Each question has an underlined word followed by four answer choices. You will choose the word that is a necessary part of the underlined word.

17.guitar

A. bandB. teacherC. songsD. strings

70) Find the word that names a necessary part of the underlined word.

18. facsimile

A. pictureB. imageC. mimeographD. Copier

ONGC chemical engg questions for practice ONGC model questions with answers,ONGC solved technical question papers

1 Higher efficiency in the combustion of solid fuel can not be achieved by

A. proper fuel preparation.

B. keeping the flue gas exhaust temperature very high.C. adopting efficient-fuel firing technique & equipment.D. supplying correct quantity of combustion air..Answer: Option B

2. A coal containing very high percentage of durain is called __________ coal.

A. bright B. splintC. non-banded D. boghead.Answer: Option B

3. During combustion of gaseous fuels, deficiency of air

A. lengthens the flame.B. tends to shorten the flame.C. does not affect the flame length.D. increases the flame temperature..Answer: Option A

4. Gross and net calorific value of a fuel will be the same

A. if its ash content is zero.B. ifits carbon content is very low.C. if its hydrogen/hydrogen compound content is zero.D. under no circumstances..Answer: Option C

5. Low temperature carbonisation

A. is mainly for producing the smokeless domestic coke.B. is meant for the production of 'metallurgical coke'.C. produces higher quantity of gas than high temperature carbonisation.D. produces less quantity of tar than high temperature carbonisation..Answer: Option A

6. Which of the following is not used as a binder in coal briquetting ?

A. Tar B. MolassesC. Pitch D. Line.A7. Size of blast furnace grade coke is __________ mm.

A. 25-80 B. 0-15

C. 15-25 D. >100.

8. Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

A. sulphur B. oxygenC. hydrogen D. carbon.Answer: Option B

9. The internal energy of the combustion products is __________ compared to that of reactants.

A. moreB. lessC. equalD. more or less ; (depends on the state of fuel.).Answer: Option B

10. Which of the following is not a product of tar distillation ?

A. Phenol & naphthaleneB. Benzol & pitchC. Anthracene & creosoteD. None of these.Answer: Option D

1 Discuss the thermodynamic restrictions on the progress of reversible reactions.

2 Develop an expression for the specific reaction rate constant based on activated complex theory.

3 Distinguish between the methods available for establishing the kinetics of chemical reactions from the data obtained in a batch or continuous reactor.

4 Compare the performances and merits of the plug flow and the stirred tank reactors behaving ideally.

5 Derive expressions for the overall conversions for a reaction of known order.

6 A homogeneous first order reaction is carried out in a batch reactor under adiabatic conditions. Develop a suitable method to find the relation temperature conversion-time. State the assumptions made.

7 Briefly explain the E and the F - curves. Draw the E and the F - curves for series and parallel combinations of one plug flow and one stirred tank reactors with unequal volumes. Comment.

8 Differentiate between an elementary and a non-elementary reaction with suitable examples.

9 What is understood by order of a chemical reaction? How is this different from "molecularity of the

reaction", if a difference between the two exists.

10 Discuss Arrhenius, Collision, and Transition state theories of temperature dependence of reaction rates.

11 Derive an expression for the concentration in the N-th reactor, if N equal sized stirred tank reactors are assembled in series. Assume first order reaction.

12 Discuss, how best you will arrange two unequal-sized stirred tank reactors for a given conversion and reaction order.

13 Derive the relation between conversion and temperature for an adiabatic reactor using the energy balance and explain how you determine the reactor size for adiabatic operation of a plug flow and a stirred tank reactor.

14 Discuss the principles of reactor stability and how it is established in a stirred tank reactor. Show qualitatively how endothermic reactions are always stable.

15 Briefly discuss the models to explain the non-ideal behavior of tubular reactors. Describe one experiment to evaluate the parameters in any one of the models.

16 What do you understand by "order of a reaction"? Indicate the methods available for determining the order of a given reaction.

17 An elementary reaction A à R à S, takes place in a mixed flow reactor. Find the condition for maximum concentration of R. What is its value? (Assume no R and S initially)

18 "There exists a conversion below which the performance of a mixed flow reactor is better or at least equal to that of plug flow reactor for adiabatic exothermic reaction" - Explain.

19 Discuss briefly the shrinking core model used for describing the global rate of fluid-solid non-catalytic reactions, and outline design methods for such reactions.Explain the different models for gas-solid non-catalytic reactions of the type,A(g) + bB(s) à E(g) + F(s)

20 Discuss the differences between chemisorption and physical adsorption and their role in catalytic reactions.

21 Discuss the effect of mass and heat transfer on the performance of industrial catalytic reactors.

22 Compare the performance of fluidized-bed, trickle-bed and slurry reactors.

23 A first order reaction is to be treated in a series of two mixed reactors. Show that the total volume of the two reactors is minimum when the reactors are equal in size.What is understood by 'optimum temperature progression'? Illustrate with an example of reversible exothermic reaction using a given feed material.

24 Compare the performance of an adiabatic and an isothermal reactor, choosing an example of an exothermic reaction.

25 Determine the activation energy and the frequency factor from the following data for the bimolecular formation of methyl ethyl ether.ToC 0 6 12 18 24 30

10 k, 5.6 11.8 24.5 48.8 100 208litres/gmol.sec

26 what do you understand by these two terms?

27 The homogeneous gas-phase reaction A à 3B has a rate constant of k = 0.5 min-1. Obtain an expression for the total pressure in a constant volume reactor as a function of time t (min) and the initial pressure po. What will be the effect of 50% inerts present initially along with pure A?

28 Under appropriate conditions, the following reaction takes place.With k1 = k2 = 0.1 min-1. R is to be produced from 1000 litres/hour of feed with CAO = 1 gmol/litre and CRO = CSO = 0. What size of plug flow reactor will maximize the yield of R? What is the concentration of R in the effluent stream of this of this reactor?

29 A reactor decomposing by a second order mechanism is passed through a PFR and CSTR of equal volumes in series. The effluent from the CSTR contains 1% of the original reactant. How much of the original reactant would be left in the process stream, if it passed through the CSTR and then through the PFR? There is no change in density or temperature of the process stream.

30 Establish the kinetics of the thermal decomposition of Nitrous oxide from the following data and find the reaction rate at 990oC and an initial pressure of 200 mm Hg.t, min 20 53 100

% decomposition 23 50 73

31 An elementary liquid phase reaction (irreversible first order) A à R, takes place in a PFR and the conversion is 96%. If a mixed flow reactor of 10 times as large as the PFR is hooked up in parallel with the existing unit, by what fraction could the production be increased for the same 96% conversion?

32 Determine the activation energy and frequency factor using Arrhenius and Transition state theories from the following data:k, min-1 0.001 0.05T oC 0.0 100.0

33 Sulfuryl chloride vapors are heated in a closed vessel for 45 min at 320oC and 1 atm initial pressure. The dissociation of SO2Cl2 to SO2 and Cl2 is a first order reaction. The reaction velocity constant is 0.00130 min-1. Calculate the percentage decomposition of SO2Cl2 and the time required to decompose 80% of SO2Cl2.

34 A homogeneous liquid phase reaction A à R takes place with 50% conversion in a mixed reactor. The reaction is elementary second order.What will be the conversion if the original reactor is replaced by one which is six times as large as the original reactor - all else remaining unchanged?What will be the conversion if the original reactor is replaced by a plug flow reactor of equal size - all else remaining unchanged?

35 A liquid is to be hydrolyzed in three mixed reactors connected in series. If each reactor has a volume of 2 litres and the feed rate to the first reactor is 500 cc/min, determine the percent hydrolysis accomplished in the three reactors.Data: Rate of hydrolysis = r = 0.16 gmol/cc.min

36 The thermal decomposition of nitrous oxide (N2O) in the gas phase at 1030oK is studied in a constant volume vessel at various initial pressures of N2O. The half-life data so obtained are as follows:

po (mm Hg) 52.5 139 290 360t1/2 (sec) 860 470 255 2122N2O à 2N2 + O2

37 Determine the rate equation that fits the data.

The decomposition of NO2 follows a second order rate equation. Data at different temperatures are as follows:T (K) 592 603 627 651.5 656k (cm3/gmol.sec)522 755 1700 4020 5030Compute the energy of activation E from the data. The reaction is 2NO2 à 2NO + O2

38Two stirred tanks of volume V1 and 2V1 are available for carrying out a first order irreversible reaction at constant density and temperature. If the flow rate of the feed stream is Q, which of the following arrangements would give the highest production rate of the product?Parallel operation of the two reactors, with equal average residence times.Parallel operation, with different average residence times.Series operation, with feed stream entering the larger reactor.Series operation, with feed entering the smaller reactor.

39 The gas phase decomposition of A takes place according to the irreversible reaction, A à 3P. The kinetics of the reaction was studied by measuring the increase in pressure in a constant volume reaction vessel. At 504oC and an initial pressure of 312 mm Hg, the following data were obtained:Time (Sec) 390 777 1195 3155 aTotal pressure (mm Hg) 408 488 562 779 931Test for a first order reaction.Calculate the value of the specific reaction rate at 504oC.The reaction A d B ‡ C has the rate equations.rA = 0.4 CA, rB = 0.3 CB - 0.4 CC

40 Three tanks of different sizes are available. At the desired production rate, the residence times of 5 min, 10 min and 15 min, are maintained in the successive stages of the CSTR battery. The feed concentrations are CAo = 0.9 ; CBo = 1.2 and CCo = 0

41 Find the concentration of B in the effluent from each tank.

Find the specific reaction rate and order of reaction for thermal decomposition of nitrous oxide on gold at 990oC and initial pressure of 200 mm Hg.t, min 20 53 100% decomposition 32& 50 73

The decomposition of phosphine is irreversible and first order at 650oC.4PH3(g) à P4(g) + 6H2(g)

The rate constant (sec-1) is reported as

log k = (-18993/T ) + 2 log T + 12.13

where T is in oK.

In a closed vessel (constant volume) initially containing phosphine at 1 atm pressure, what will be the pressure after 50, 100 and 500 sec. The temperature is maintained at 650oC.

The kinetics of an aqueous phase decomposition of A is investigated in two CSTR's in series, the first having half the volume of the second. At steady state with a feed concentration of 4 gmol/lit., and mean residence time of 65 sec in the second reactor, the concentration of feed to second from the first is found to be 2 gmol/lit., while that of the stream leaving the second is 1 gmol/lit. Find the suitable kinetic rate expression.

Two small samples of solids are introduced into a constant environment oven and kept there for 1 hour. Under these conditions 4 mm particles are 58% converted and 2 mm particles are 87.5% converted. Findthe rate controlling mechanism for the conversion of solids.Time needed for the complete conversion of 1 mm particles in this oven.

The catalytic reaction A Û M + N takes place in a reactor where the effect of diffusive mass transfer may be neglected. The following steps may be consideredAdsorption of AAdsorbed A reacts with a vacant active centre to produce adsorbed M and NDesorption of M and N.Assuming the surface reaction is rate controlling, develop the overall rate equation.

The solid-catalyzed decomposition of gaseous A proceeds as follows:A à R -rA = kCA2

A tubular pilot plant reactor packed with 2 litres of catalyst is fed 2 m3/hr of pure A at 300oC and 20 atm. Conversion of reactant is 65%.

In a large plant, it is desired to treat 100 m3/hr of feed gases at 40 atm and 300oC containing 60% A and 40% inerts to obtain 85% conversion of A. Find the internal volume of the reactor required.

A batch of solids of uniform size is treated by gas in a uniform environment. Solid is converted to give a non-flaking product according to the shrinking core model. Conversion is about 7/8 for a reaction time of one hour, and conversion is complete in two hours. What mechanism is rate controlling?

The following kinetic data on the reaction A à R are obtained in an experimental packed bed reactor using various amounts of catalyst and a fixed feed rate of FAO = 10 kmol/hr.W kg. catalyst 1 2 3 4 56 7XA 0.12 0.2 0.27 0.33 0.37 0.410.44

Find the reaction rate at 40% conversion.

ONGC free solved placement papers ONGC chemical engg questions for practice ONGC models questions for chemical engineering questions

 1. The fluid property, due to which, mercury does not wet the glass is A. surface tensionB. viscosityC. cohesionD. adhesion Answer: Option A 

2. Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds A. 4000 B. 2100C. 1500 D. 3000.Answer: Option B 3. When the momentum of one fluid is used for moving another fluid, such a device is called a/an A. jet pumpB. blowerC. acid eggD. none of these.Answer: Option A 4. The normal stress is the same in all directions at a point in a fluid, when the fluid is A. non-viscous.B. incompressible.C. both (a) and (b).D. having no motion of one fluid layer relative to the other..Answer: Option D 5. Head developed by a centrifugal pump depends on its A. speedB. impeller diameterC. both (a) and (b)D. neither (a) nor (b).Answer: Option C6. Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum A. flow rateB. mean velocityC. both 'a' & 'b'D. neither 'a' nor 'b'.Answer: Option B 7. The head loss in turbulent flow in a pipe varies A. as velocityB. as (velocity)2C. inversely as the square of diameterD. inversely as the velocity.Answer: Option B 8. Most commonly used joint in the underground pipe lines is the A. sleevejointB. coupling

C. flangeD. expansion joint.Answer: Option A 9. Schedule number of a pipe, which is a measure of its wall thickness, is given by A. 1000 P'/SB. 100 P'/SC. 1000 S/P'D. 10000 P'/S.Answer: Option A 10. The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the A. discharge.B. suction.C. suction minus vapor pressure of the liquid at suction temperature.D. discharge minus vapor pressure of the liquid at the discharge temperature..Answer: Option C 11. With increasing flow rate, the hydraulic efficiency of a centrifugal pump A. monotonically decreases.B. decreases and then increases.C. remains constant.D. increases and then decreases..Answer: Option A 12. The velocity profile for turbulent flow through a closed conduit is A. logarithmic B. parabolicC. hyperbolic D. linear.Answer: Option A 13. In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of A. relative roughness.B. absolute roughness.C. friction co-efficient for flows at equal Reynold number.D. all (a), (b) & (c)..Answer: Option C 14. Water hammer in a pipeline results from the A. bursting of pipelines due to closure by a valve.B. rapid pressure change due to a rapid change in the rate of flow.C. pressure increase due to closure of a valve resulting in decrease in rate of flow.

D. none of these..Answer: Option B 15. Molten soap mass is transported by a __________ pump. A. diaphragm B. reciprocatingC. gear D. centrifugal.Answer: Option C 16. Which of the following denotes the effect of compressibility in fluid flow ? A. Weber numberB. Mach numberC. Euler numberD. Reynolds number.Answer: Option B 17. Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe. A. smaller thanB. larger thanC. same asD. twice.Answer: Option A 18. The terminal velocity of a small sphere settling in a viscous fluid varies as the A. first power of its dimeter.B. inverse of the fluid viscosity.C. inverse square of the diameter.D. square of the difference in specific weights of solid & fluid..Answer: Option B 19. If the discharge of a centrifugal pump is throttled, then its suction lift A. increasesB. decreasesC. remains unchangedD. data insufficient to predict.Answer: Option A 20. Foot valves provided in pumps are __________ valves. A. reliefB. three/four wayC. pressure reducingD. directional control.Answer: Option D 

21. At high Reynolds number A. inertial forces control and viscous forces are unimportant.B. viscous forces predominate.C. inertial forces are unimportant and viscous forces control.D. none of these..Answer: Option A 22. Power loss in an orificemeter is __________ that in a venturimeter. A. less thanB. same asC. more thanD. data insufficient, cannot be predicted.Answer: Option C 23. The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime ? A. 0.5 B. 1C. 1.5 D. 3.Answer: Option A 24. What is the normal range of exit cone angle of a venturimeter ? A. 2 to 5B. 7 to 15C. 15 to 25D. >25.Answer: Option B 25. The dimension of dynamic viscosity is A. ML-1T-1 B. L2T-1C. LT-2 D. ML-1T-2.Answer: Option A .: 26. A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity A. same as that of A.B. one fourth as that of A.C. twice as that of A.D. four times as that of A..Answer: Option B 27. The pitot static tube does not measure the __________ pressure. 

A. staticB. totalC. difference in static & dynamicD. all (a), (b) and (c).Answer: Option D 28. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid. A. BinghamB. NewtonionC. perfectD. none of these.Answer: Option C.29. In fluid flow, cavitation is caused, if the A. fluid velocity decreases to zero.B. total energy decreases.C. both (a) and (b).D. flow pressure approaches its vapor pressure at the prevailing temperature..Answer: Option D 30. The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is A. 0.5 B. 1C. 1.5 D. 2.Answer: Option D 31. The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s). A. 24000 B. 24C. 0.24 D. 0.44.Answer: Option D 32. For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter) A. Vs/Dp2 B. Vs2/Dp2C. Vs2/Dp3 D. Vs/Dp3.Answer: Option A 33. The maximum delivery pressure of compressors can be upto __________ atmospheres. A. 10 B. 100C. 250 D. 1000.Answer: Option D

 34. Dimension of surface tension is(where, F = force, L = length) A. FLT-1B. F-1 . LC. F.L-2D. F-2 . L.Answer: Option A 35. Which of the following is not a dimension-less parameter ? A. Euler numberB. Specific gravityC. Fanning friction factorD. None of these.Answer: Option D36. Co-efficient of velocity is __________ the coefficient of discharge. A. less thanB. more thanC. equal toD. not related to.Answer: Option B 37. All pipes of a particular nominal size have the same A. inside diameterB. outside diameterC. thicknessD. none of these.Answer: Option B 38. For the transfer of solution of thick slurry, the pump used is a __________ pump. A. reciprocating B. gearC. diaphragm D. centrifugal.Answer: Option C 39. Which of the following is not concerned with the fluid-particle interaction ? A. Drag co-efficientB. Froude numberC. Galileo numberD. Weber number.Answer: Option D 40. Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft. A. 40 B. 34C. 8 D. 37

.Answer: Option C

ONGC chemical engg questions with answers, ONGC previous years technical questions with answers, ONGC latest free solved sample placement papers. ONGC aptitude,reasoning,technical questions with answers

ONGC Chemical Engineering questions with answers

1. Dissolving salt in water is an example of which type of change ?

Physical-Answer

Nuclear

Chemical

Biochemical

2. When nuclear change takes place, which is true

Energy is destroyed

Energy is released-Answer

Energy is changed

None of these

3. Which type of radiation is unaffected by magnetism ?

Alpha

Beta

Gamma-Answer

All of these

4. Which temperature scale is an absolute scale, where the zero point is the lowest possible temperature ?

Kelvin-Answer

Celsius

Fahrenheit

Centigrade

5. The relative randomness of molecules in the states of matter is best indicated by

Solid > Liquids > Gas-Answer

Liquid > Gas > Solid

Liquid > Solid > Gas

Gas > Liquid > Solid

6. Whether or not two liquids are miscible is determined by

Molecular Size : Molecules of similar sizes tend to mix together

Density : Liquids of simliar densities usually mix well together

Polarity : Polar and nonpolar liquids are not miscible while polar liquids can usually be mixed with each other-Answer

All of the above factors directly affect miscibility

7. The Triple Point is

The combination of standard temperature, pressure and volume

The combination of temperature and pressure at which the solid, liquid and gas phases can coexist at equilibrium

The combination of pressure and temperature at which liquid, gas, and plasma phases all exist in equilibrium-Answer

The combination of temperature and pressure at which liquids and gases cannot be distinguished from each other

8. If the work done by a force depends only on the initial and final stages and not on the path taken, then this type of force will be

Conservative Force-Answer

Non-conservative Force

Conservative as well as Non-conservative force

None of these

9. Working between which pair of following temperatures, the efficiency of a carnot engine will be maximum ?

10 Degrees F and 10 Degress R-Answer

10 Degrees F and 10 Degress C

10 Degrees R and 10 Degress C

It will be same in all the above cases

10. Dacron is a

Polyester-Answer

Polyamide

Nylon

Resin

11. Which of the following has the highest stable atom ?

Bi

Al

Cl

Pb-Answer

12. In Friedel-Crafts reaction, AlCl3 acts as a

Lewis Acid-Answer

Lewis Base

Catalyst

Reactant

13. The number of unpaired electrons in [Ni(CO)4] is

Zero-Answer

One

Three

Five

14. Iodoethane reacts with sodium to form

Pentane

Propane

Butene

Butane-Answer

15. An ideal gas has maximum density at

1 atm, 300 K

2 atm, 150 K-Answer

0.5 atm, 600 K

1 atm, 500 K

16. Which of the following metals is present in brass, bronze and german silver ?

Defence Mechanism

Hydrolysis of ATP

Trifling of Contraction-Answer

Generating right electrical potential across cell membrane

17. First ionization potential is ___________ second ionization potential.

Less than-Answer

More than

Equal to

None of these

18. n-propyl benzene is best prepared by

Friedel-Crafts Reaction

Wurtz Reaction

Wurtz-Fitting Reaction-Answer

Grignard Reaction

19. Chloroform is slowly oxidized by air to

Formly Chloride

Carbonyl Chloride-Answer

Trichloroacetic Acid

Formic Acide

20. Electrophoresis is

Movement of colloidal particle under the influence of electric field-Answer

Movement of colloidal particle under the influence of magnetic field

Movement of colloidal particle in zig-zag fashion

Scattering of light by colloidal particles

21. Rosenmund's reduction of an acyl chloride gives

Alcohol

Ester

Hydrocarbon

Aldehyde-Answer

22. Pyrophosphoric acid is

Monobasic

Dibasic-Answer

Tribasic

Basic

23. Which of the following is an example of a mathematical model ?

Area of a circle = PI x Radius^2

Volume of a cube = Length^3

Force = Mass x Acceleration

All of the above-Answer

24. The specific activity of an enzyme is relatively constant between pH 3-8. If the enzyme activity at pH 7.0 is to be modeled, which of the following would be a reasonable simplifying assumption ?

Specific activity is not dependent on temperature

Specific activity is not dependent on substrate concentration

Specific activity is not dependent on pH-Answer

All of the above

25. The bioreactor which is most commonly used in industry is the

Batch Fermenter

Fed Batch Fermenter-Answer

Continous Fermenter

Batch Continous Fermenter

26. Which of the following is correct with regards to microbial growth ?

Cells are autocatalysts and thus the rate of increase in biomass (dX/dt) keeps changing

Many factors affect cell growth

The rate of increase in biomass concentration is not constant during a fermentation

All of the above are correct-Answer

27. During a batch fermentation, when would the specific growth rate be lowest ?

During exponential phase

During the lag and stationary phase-Answer

When cells are growing at their fastest rate

Throughout the fermentation

28. Which of the following describes a limitation of the exponential growth model ?

Biomass growth is assumed to be not linked to the availability of nutrients or substrates

It does not predict when cell growth will cease

It predicts that all types of cells under all conditions will grow exponentially

All of the above are correct-Answer

29. In large scale bioreactors, dissolved oxygen levels are often so low that they restrict the rate of cell growth. In this case

Dissolved oxygen would be the growth limiting nutrient

The nitrogen source would be the growth limiting nutrient

The carbon source would be the growth limiting nutrient-Answer

Dissolved oxygen levels would not be the growth limiting nutrient

30. Which of the following is not correct ?

The Monod model is an empirical correlation

The Michaelis Menten model is a mechanistic model

The Monod model was derived from a study of the mechanism of microbial growth-Answer

The Michaelis Menten model was derived from a study of the mechanism of enzyme action

31. The technique of Nick Translation was developed by

Rigby and Paul Berg-Answer

Winkler

Roderick and Rigby

None of them

32. Which technique allows knowing the status in the interphase ?

Hybridization Microarray

Karyotyping

Fluorescence in situ Hybridization-Answer

Pedigree Analysis

33. _________ observed that protein sequences undergo variation during evolution according to certain patterns

Zuckerkandl

Pauling

Margaret Dayoff-Answer

All of them

34. Which of the following would have the highest oxygen transfer rate characteristics ?

A sparged stirred tank bioreactor being stirred at 200 rpm

A non-sparged stirred tank bioreactor being stirred at 200 rpm

A shake flask being mixed at 200 rpm

All of the above would have equivalent oxygen transfer rate characteristics

The answer is A sparged stirred tank bioreactor being stirred at 200 rpm

35. Molar heat capacity of water in equilibrium with ice at constant pressure is

Zero

Infinity

40.45 KJ K^-1 mol^-1

75.48 JK^-1 mol^-1

The answer is Zero36. Ammonium molybdate test is used to detect the presence of

Borate

Phosphate

Chloride

Bromide

The answer is Phosphate37. Increasing the temperature of an aqueous solution will cause

Decrease in Molality

Decrease in Molarity

Decrease in Mole Fraction

Decrease in Percentage by Weight

The answer is Decrease in Molarity

38. IUPAC name of the compound CH3CH(OH)COOH is

Lactic Acid

A-Hydroxypropanoic Acid

Carboxy Propanol

2-Hydroxypropanoic acid

The answer is 2-Hydroxypropanoic acid39 Which of the following will not displace hydrogen ?

Ba

Pb

Ag

Sn

The answer is Ag40. The amount of heat measure for a reaction in a bomb calorimeter is

DG

DH

DE

PDV

The answer is DE41. Which of the following oxides is most amphoteric ?

Na2O

Al2O3

SO3

P2O5

The answer is Al2O342. Which among the following is most basic compound ?

Benzylamine

Aniline

Acetanilide

P-Nitroaniline

The answer is Benzylamine43. Which of the following elements form interstitial compounds ?

Fe

Co

Ni

All of these

The answer is All of these

44 The EAN of Co in K3[Co(NH3)6] is

34

35

36

37

The answer is 3645 The position of electron is identified by quantum numbers n and l. (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n

= 3, l = 2 (iv) n = 3, l = 1 The order of increasing energy from the lowest to highest is

(iv) < (ii) < (iii) < (i)

(ii) < (iv) < (i) < (iii)

(i) < (iii) < (ii) < (iv)

(iii) < (i) < (iv) < (ii)

The answer is (iv) < (ii) < (iii) < (i)46. Gutta Percha is

Trans-polyisoproprene

A synthetic polymer

A very hard material

All are correct

The answer is All are correct47. Which one of following does not give acetylene with water ?

CaC2

BaC2

SrC2

Al4C3

The answer is Al4C348. Normality of 0.3 M phosphoric acid (H3PO3) is

0.3

0.6

0.9

0.1

The answer is 0.649. ___________ technique is based on the fact that there are variations in the DNA sequence of restriction sites among different individuals and different species.

Polymer Chain Reaction

Hybridoma

Restriction Fragment Length Polymorphism

None of these

The answer is Restriction Fragment Length Polymorphism50 Which enzyme forms phosphodiester bonds between adjacent nucleotides and covalently links two individual fragments of double stranded DNA

Alkaline Phosphates

DNA Polymerase

DNA Liqase

Exonuclease

The answer is DNA Liqase51 Name the enzyme used to prevent unwanted self-liquation of vector DNA molecules in cleaning procedures

Alkaline Phosphates

DNA Ligase

DNA Polymerase

Helicases

The answer is Alkaline Phosphates52. Many of the vector for use in eukaryotic cells are constructed such that they can exist in both the eukaryotic cell and E.coli. Such vectors are known as

Shuttle Passengers

Shuttle Vectors

Expression Vectors

All of these

The answer is Shuttle Vectors53 ___________ are constructed by combining certain features of plasmid and the cos sites of the phage lambda

Hybrides

Cybrids

Cosmids

None of these

The answer is Cosmids54 ____________ are used as vector to clone DNA fragments of more than 1 Mb in size

Yeast Artificial Chromosomes

Bacterial Artificial Chromosomes

Plant Chromosomes

All of these

The answer is Yeast Artificial Chromosomes55 ___________ vector can accommodate upto 300-350 kb of foreign DNA

YAC

BAC

Plant

AnimalAnswer BAC56 A collection of clones representing the complete genome of an organism is called

Genomic Library

DNA Library

Inventory

None of theseAnswer-Genomic Library57. Which method is used to introduce recombinant DNA into host cell ?

Electroporation

Microinjection

Biolistics

All of the above-Answer58. Who invented Polymerase Chain Reaction ?

Ely Lilly

Kary Mullis

Sanger

All of these

The answer is Kary Mullis59 Who developed Dideoxynucleotide Chain termination method ?

Frederick Sanger and Andrew Coulson

Andrew Coulson and Maxam

Gilbert

All of them

The answer is Frederick Sanger and Andrew Coulson60 Who coined the term genomics ?

Winkler

Thomas Roderick

Craig Venter

All of them

The answer is Thomas Roderick61. ___________ primarily involves high-throughput DNA sequencing followed by assembly, organization and management of DNA sequence

Structural Genomics

Functional Genomics

Contigs

None of these

The answer is Structural Genomics62. ____________ deals with the reconstruction of the genome to determine the biological function of genes and gene interaction

Structural Genomics

Functional Genomics

Random Libraries

Contigs

The answer is Functional Genomics63 _________ of genomic DNA are constructed in small and edium seat plasmid vector along with genomic shotgun large unseat BAC library

Random Arrays

Mirco Arrays

Random Libraries

All of these

The answer is Random Libraries64. BLAST means

Basic Local Alignment Search Tool

Basic Local Array Search Tool

Basic Linkage Alignment Search Technique

None of them

The answer is Basic Local Alignment Search Tool65. ___________ is a closed culture system, which contains limited amount of nutrients

Fed-Batch Culture

Continuous Culture

Batch Culture

All of these

The answer is Batch Culture66.If a batch culture is continuously or sequentially fed with fresh medium without remaining the growing culture, it is called

Batch Culture

Fed-Batch Culture

Continuous Culture

Another Culture

The answer is Fed-Batch Culture

67 If the temperature of saturated water is increased infinitesimally at constant entropy, the resulting state of water will be(A) Liquid (B) Liquid – vapor coexistence(C) Saturated vapor (D) Solid

68 Water is flowing under laminar conditions in a pipe of length L . If the diameter of the pipe is doubled, for a constant volumetric flow rate, the pressure drop across the pipe(A) decreases 2 times (B) decreases 16 times(C) increases 2 times (D) increases 16 times

70 For uniform laminar flow (in the x -direction) past a flat plate at high Reynolds number, the local ) varies with the distance along the plate (boundary layer thickness ( x ) as

ONGC chemical engineering questions with answers,ONGC previously asked questions for practice,ONGC memory based engineering questions with answers

Chemical Engineering questions with answers1Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.

A. isothermalB. adiabaticC. isentropicD. none of these

Answer: Option A

2. Internal energy change of a system over one complete cycle in a cyclic process is

A. zeroB. +veC. -veD. dependent on the path

Answer: Option A

3. Heating of water under atmospheric pressure is an __________ process.

A. isochoric B. isobaricC. adiabatic D. isothermal

Answer: Option B

4 Heating of water under atmospheric pressure is an __________ process.A. isochoric B. isobaricC. adiabatic D. isothermal

Answer: Option B

5 Van Laar equation deals with the activity co-efficients in

A. binary solutionsB. ternary solutions

C. azeotropic mixture onlyD. none of theseAnswer: Option A

6 Cement Kiln is a

A. rotary KilnB. tunnel KilnC. natural draft furnaceD. batch furnaceAnswer: Option A

7 In a furnace employing forced draught as compared to induced draught,

A. air is sucked in, so air leaks are more and hence the furnace efficiency is reduced.B. the fan operates hot and hence blades are liable to corrosion and erosion.C. positive pressure exists in the furnace.D. none of theseAnswer: Option C

8 Regenerators are installed in

A. coke ovensB. open hearth furnaceC. both (a) & (b)D. neither (a) nor (b)Answer: Option C

9 _________ atmosphere is maintained inside an iron blast furnace.

A. Oxidising B. ReducingC. Inert D. DecarburisingAnswer: Option B

10 Higher efficiency in the combustion of solid fuel can not be achieved by

A. proper fuel preparation.B. keeping the flue gas exhaust temperature very high.C. adopting efficient-fuel firing technique & equipment.D. supplying correct quantity of combustion air.

Answer: Option BDescrptive questions with answers1. What is turndown ratio ?'Turndown ratio' is a flow measurement term that indicates the range a specific flow meter, or meter type, is able to measure...to measure with acceptable accuracy. It is also known as rangeability. It is important when choosing a flow meter technology for a specific application. If a gas flow to be measured is expected to vary between 100,000 m³ per day and 1,000,000 m³ per day, the specific application has a turndown ratio of at 10:1. Therefore the meter requires a turndown ratio of at least 10:1. For example: if the meter had an advertised maximum flow of 2,000,000 m³ per day then the required turndown ratio would be 20:1.The turndown ratio of each type of meter is limited by theoretical considerations and by practical

considerations. For example, orifice meters create a pressure drop in the measured fluid proportional to the square of the velocity. Therefore the range of differential pressure can become too large and compromise accuracy. It can also create process problems such as hydrate formation, and in the case of measuring the discharge of a compressor, there is a limit to how much pressure loss is acceptable.Turndown ratio is one of a number of considerations in choosing a meter type for an application. Some other considerations are price, maintenance cost, accuracy, the fluid type and the velocity of the flowing fluid.

2. Why Plasticizer is added the paint?Physical and Chemical Examination of Paints, Varnishes, Lacquers, and ... Test by adding plasticizer to the lacquer solution in an amount equal to the base resin

3. What type of glass is used for the manufacture of Electric bulb?An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a filament wire heated to a high temperature by an electric current passing through it, until it glows (see Incandescence). The hot filament is protected from oxidation with a glass bulb that is filled with inert gas (or evacuated). In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. The light bulb is supplied with electrical current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections.

4. Hydrogenation is carried out in which type of reactor?Chemical ... Hydrogenation - to treat with hydrogen - is a chemical reaction between ... temperature and/or pressure; 7.3 Flow hydrogenation; 7.4 Industrial reactors ... The reduction reaction is carried out at different temperatures and pressures depending upon the substrate and the activity of the catalyst

5. If O2/ Fuel ratio is increased(or, decreased) how adiabatic flame temperature will vary ?premixed fuel-air mixture will only burn as long as the fuel concentration is between the ... the flammable range will widen when the initial temperature is increasing. Changes in initial pressure will for hydrocarbons in air not change the LFL .... 6. Heat loss is maximum when critical radius is Heat is lost from the pipe to the surrounding medium at temperature , with a convection heat transfer ... The value of r2 at which heat transfer rate reaches maximum is determined

7. Importance of Biot No. A number of important areas were identified: heat transfer ... and Biot numbers on the accuracy of the numerical approximation of the diffusion equation for heat ...

8. Importance of Dirt Factor…diRtFactor--Late Models by Speed Sports Software (formerly DWR ... If you are missing that "factor" in your life, then you need diRtFactor

9. Why Heavy water is used as moderator in the nuclear reactor ?Moderator is required in a thermal reactor to slow down the neutrons produced in the fission reaction to .025 ev so that the chain reaction can be

10. Why D2O is used in nuclear reactor instead of ordinary water?In comparison, in ordinary water, there are only about 156 deuterium atoms per million hydrogen atoms). .... the biological effects of deuterium per se, but instead on deuterium's ability to .... Heavy water is used in certain types of nuclear reactors where it acts as a .... D2O is more toxic to malignant than normal animal cells .

11. Ordinary water is not preferred in nuclear reactor becauseWith the discovery of nuclear fission in late 1938, and the need for a neutron ... Partly because of Nazi

Germany's over-reliance on heavy water, it did not ... Most modern reactors use enriched uranium and normal "light water" (H2O) moderator. ..... large amounts of power, so the chemical methods are generally preferred.

12. Reverse Osmosis is also called

(A) Dialysis (B) Ultrafiltration(C) Electrodilysis(D) DiffusionSchematics of a reverse osmosis system (desalination) using a pressure exchanger. ..... Prefiltration antiscalants: Scale inhibitors (also known as antiscalants)

13. The specific surface of spherical particle is defined by….

14. The porosity of a compressible cake is (A) Maximum at the filter medium(B) Maximum at the upstream face(C) Same throughout the thickness of cake (D) Maximum at the filter medium & Minimum at the upstream face.For a spherical particle of diameter D p, F s =1; for a non-spherical particle, the ... The equivalent diameter is sometimes defined as the diameter of a sphere of ... in each fraction can be calculated and added to give the specific surface

15. Fermentation of alcohol from molasses is followed by which process..Various factors namely: process design, molasses quality, yeast strain ... interest in ethanol fermentation has been generated over the last two decades ... industry and further addresses the steps followed in trouble shooting.

16. Why Dimensional Analysis is done?In physics and all science, dimensional analysis is a tool to find or check .... the same is done to the dimensional symbols attached to those quantities

17. Dynamic similarity is(A) The similarity of shapes(B) The similarity of streamline pattern(C) The similarity of forces influencing the fluid motion.(D) The similarity of discharge.In physics and all science, dimensional analysis is a tool to find or check .... the same is done to the dimensional symbols attached to those quantities

18. What is control Valve..?Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening

19. Agitated film evaporators are generally used for….Thin film or wiped film evaporators are used to separate a mixture of liquids having different ... Generally the vapour outlet is provided on the top side of the shell.

20. In a multiple effect evaporator with forward feed….There are two feed operations - backward feed and forward feed operations. A brief explanation of these operations: Multi Effect Evaporators. 21. In a multiple effect evaporator with backward feed….There are two feed operations - backward feed and forward feed operations. A brief explanation of

these operations: Multi Effect Evaporators.

22. Cost of piping in a fluid processing unit(e.g., distillation) of a chemical process plant is about………….. % of the fixed capital investment?23. Purchased cost of equipment for a chemical process plant ranges from………….. % of the fixed capital investment?

24. Which of the following methods of depreciation calculation results in minimum book value.

25. In finanacial accounting of a chemical plant, which of the following relationship is valid?

26. Which of the following is not a component of the working capital for a chemical process plant?(A) Product inventory(B) In-process inventory(C) Minimum cash reserve(D) Storage facilities.

27. Effectiveness factor of a catalyst is given by

28. Which of the following substances is most commonly used for cloud seeding (Artificial Rains)?(A) Potassium chloride(B) Silver Iodide(C) Zinc sulphate(D) Magnesium hydroxide

29. Why the melting and boiling point of alkali metals are high?

30. Which alkali metal will have large ionic radii in water?(A) Na(B) K(C) Cs(D) H

31. Which alkali halide have large electro negativity?

32. When alkali metals are exposed to air.

33. How Chilton analogy is related to the friction factor?34. Why Antioxidants are added to petrol

35. Ammonia synthesis from Natural Gas is done by which process

36. Poison for platinum catalyst is..(A) Sulphur(B) Arsenic(C) Phosphorous(D) Coke

37. Match the following:(A) Hydrogenation 1. Iron(B) Ammonia synthesis 2. Platinum 3. Zeolite 4. Nickel

38. Match the following:(A) Catalytic Reforming 1. High speed Diesel(B) Smoke Point 2. Kerosene 3. Gasoline 4. Aromatics39. Match the following:(A) Xtra mile 1. Indian Oil(B) Power 2. BP(C) Speed 3. HP

40. The Bode Stability criterion is applicable when:

(A) Gain and Phase curves decreases continuously with frequency.(B)Gain curve increases and Phase curves decreases with frequency.(C)Gain and Phase curves both increses with frequency.(D)Gain curve decreases and Phase curves increases with frequency.

uestion paper format:

que 1 to 40: objective- general awareness.que 41 to 120: objective- subject related(technical)que 121,122: subjective-general awarenessque 123,124: subjective- subject related(technical).

some of the questions that i remember:=>mansabdari system introduced in india by?=>inc president in surat in 1907 at congress split?=>river cutting the tropic of capricorn twice?=>football wc to be held at?=>principal scientific advisor to pm is?=>president submits his resignation to?=>minimum age to be a judge of supreme court?=>first private company to get cisf cover?=>blood pressure measured by?=>highest peak of satpura range?=>latest sex ratio of india?=>least decadal population growth in which state of india?=>when sun is nearest to the earth it is called?=>isro development and education center at?=>origin of river krishna?=>next climate change cpo to be held at?

=>white blood cells are also called?=>bear lake situated in which country?=>rest questions i will post as i recall

Certain question on GS such as

1. Bear lake--canada2. river cutting tropic of capricorn----limpopo3. Author of NEEL DARPAN----Desh Bandhu Mitra4. Chairman of congress during split of INC into extremist and moderate(popularly known as Surat split)---Ras Behari Ghosh5. No min age defined for the judge of supreme court.6. Most sweet naturally occuring sugar is -----FRUCTOSE7. Pellagra is due to deficiency of Vitamin B3 (Niacin)8. Fundamental rights were first raised in the KARACHI SUMMIT of INC9. President submits his resignation to VICE PRESIDENT10. Tipaimukh DAM----MANIPUR11. Krishna River emerges from ----MAHABALESHWAR12. Tadri Ultra Mega Power Project is at------Karnataka13. State with highest decay in population growth rate---ANDHRA PRADESH14. Sex ratio of India---93315. MANSABDARI---AKBAR16. Grandmaster Parimarjan Negi has won----Parsvnath Commonwealth Chess Championships17. NH_15------Pathankot to Jaiselmer---Kandla( Gujarat18. National Solar Mission is to ensure 20000 MW power production by the year---202219. Highest Peak of SATPURA RANGE------DHUPGARH20. Moplah Rebels------MALABAR COAST21. Political Guru of Mahatma Gandhi------Gopal Krishna Gokhale22. 2010 FIFA world cup-----Brazil23. Chairman of the Scientific Advisory Council to the Indian Prime Minister--- C N R Rao24. In Assembly elections state in which a single party has won all seats----SIKKIM25. First Pvt company being provided CISF security------INFOSYS

 26. Indian Space appliocation center located at --------AHMEDABAD and many more of similar type....

There were 40 GS question in total and no negative marking