R.C. TECHNICAL INSTITUTE, AHMEDABAD MECHANICAL …

ASSIGNMENT 1

TT – 1

CO1: Analyze performance of Internal Combustion Engines using performance parameters and

heat balance sheet.

R.C. TECHNICAL INSTITUTE, AHMEDABAD

MECHANICAL ENGINEERING

DEPARTMENT

Subject Code: 3351901 Subject Name: THERMAL ENGINEERING-II

UNIT:- 1

QUESTIONS:-

GROUP: - 1

1. State the function of following parts:

Crankshaft b .Camshaft c. Connecting rod d. Flywheel

2. With a neat sketch , explain the working of a spark plug.

3. Draw the valve timing diagram for a 4-S C.I. engine.

4. Following observations are available during trial of four stroke single cylinder SI engine. Diameter of

Cylinder: 300mm Stroke: 500mm

Pressure Ratio: 6 Mean Effective Pressure: 8 bar

Speed: 320 rpm Calorific Value of fuel: 21000 KJ/M3

Fuel consumption rate: 0.5 M3/min. Mechanical Efficiency: 70%

Find (1) Indicated Power (2) Brake Power (3) Indicated Thermal Efficiency

5. Gather information of the various engine performance parameters of any one car and its various

variants. Compare the price of the 3 variants and analyze whether the extra money put is justified for

its engine performance.

GROUP: - 2

1. Draw the valve timing diagram for a 4-S S.I. engine

2. Describe the working of 4_S cycle petrol engine with appropriate diagram . 3. What is supercharging? State its different methods.

4. The following data was recorded during a test run made on a single cylinder, four stroke engines

having a compression ratio of 6.

(i) Bore and stroke = 10 cm and 12.5 cm respectively

(ii) Dead load and spring balance reading = 60 N and 20 N

(iii) Effective radius of brake drum = 40 cm

(iv) Fuel consumption = 1.2 kg/hr

(v) Calorific value of fuel = 42500 kJ/kg.

5. Select any 2 wheeler and write its engine classification and its performance parameters.

GROUP: - 3

1. The following data was recorded for a single cylinder, 2- stroke oil engines.

The mean effective pressure = 550Kpa, cylinder diameter =21 cm, piston stoke 28 cm, engine

speed=360 RPM, brake torque =628 N.m.

Determine (i) Indicated Power (ii) Brake power (iii) Mechanical efficiency

2. Draw a simple sketch of I.C .Engine and label different parts on them.

3. Classify I.C.Engines based on any four points.

4. Differentiate between 2-S and a 4-S I.C.engine on any 4 points.

5. For any AMTS bus, write its engine classification, its make and performance

parameters.List the common problems encountered in its smooth running.

GROUP: - 4

1. Describe Morse test.

2. Identify the reasons for differences in actual and theoretical valve timing diagram for 4-S petrol

engine.

3. Explain various methods of governing of I.C.engines and state the governing method for your

automobile.

4. List and sketch the thermodynamic cycles employed in I.C.engines.

5. A single cylinder 2 stroke oil engine having following data:

Mean effective pressure = 3 bar

Cylinder diameter of the engine = 30 cm.

Length of piston stroke = 40 cm.

Engine Speed = 300 RPM.

Mechanical Efficiency OF the engine = 65 %

Calculate :- (i) Indicated Power in KW.

(ii) Brake Power in KW

GROUP: - 5

1. Draw and explain typical lubricating system of I.C.engine .

2. Explain with a neat sketch the working of a simple carburetor.

3. Describe the working of a fuel pump and an injector with the help of a suitable sketch.

4. The following data was recorded during a test run made on a single cylinder,

Four stroke engines.

Bore and stroke = 10 cm and 12.5 cm respectively

Dead load and spring balance reading = 60 N and 20 N

Effective radius of brake drum = 40 cm

Speed of engine = 2000 rpm

Indicated mean effective pressure = 0.25 MPa

Determine (i) Indicated Power (ii) Brake power (iii) Mechanical efficiency

5. List the common faults faced while riding a 2 wheeler. Suggest the hands on remedies for

the same.

CONTINUOUS ASSESSMENT SCHME

Sr.

No.

Criteria to be Assessed Below

Expectations (1-3)

Meets

Expectations (4-6)

Exceeds

Expectations (7-10)

1. Timely submission

2. Organization and style ( neatness, clarity, writing and drawing skill)

3. Quality of Content

4.

Performance Analysis of I.C.Engines

5.

Total (Out of 40)

ASSIGNMENT 2

TT – 1

CO2: Select alternate fuel and related support system for various I.C.Engines



DEPARTMENT


UNIT:-2 QUESTIONS:-

GROUP: - 1

1. Write a brief note on emission norms.

2. Discuss the safety issue while using CNG and LPG as fuels.

3. Discuss the need of alternative fuels.

4. Gather information regarding BS IV norms followed in India.

GROUP: - 2

1. List the properties of CNG.

2. What are the different problems to be faced while using alternative fuels.

3. What is Natural gas? How it is obtained? Discuss its advantages and

disadvantages.

4. What is the economically best choice between purchasing a hybrid or typical gasoline engine

automobile?

GROUP: - 3

1. Explain LPG fuel system conversion kit in detail.

2. Write a short note on Biodiesel.

3. Mention the merits and demerits of Alcohol.

4. Compare the emissions given out by gasoline engine and CNG engine.

GROUP: - 4

1. List advantage and disadvantage of Liquid Hydrogen as a fuel.

2. Discuss the effect of emitted gases in atmosphere.

3. Enlist the changes required in the petrol engine to retrofit the CNG kit.

4. Compare the emissions of LPG engines with respect to petrol and diesel engines.


Sr.

No.

Criteria to be Assessed

Below

Expectations (1-3)

Meets

Expectations (4-6)

Exceeds

Expectations (7-10)




4.


Total (Out of 20)

ASSIGNMENT 3

TT – 1

CO3: Analyze the performance of various refrigeration systems using standard procedures.



DEPARTMENT


UNIT:-3 QUESTIONS:-

GROUP: - 1

1.Differentiate between: Vapor Absorption and Vapor Compression Refrigeration System 2. Explain the effect of subcooling and superheating on performance of VCRS. 3. Draw a neat sketch of Bell Coleman cycle and explain the cycle. 4. Describe the properties of refrigerant used in common practice. 5. In a theoretical cycle, condensing temperature is 380C. The refrigerant used is R12. If the evaporation temperature is -7C then calculate C.O.P. of the cycle. Enthalpy of refrigerant leaving the compressor is 407 KJ/Kg.

Temperature hf (kJ/kg) hg (kJ/kg)

-7 193.53 349.53

38 238.0 368.10

GROUP: - 2

1. State how difficutlties observed in reversed Carnot cycle are eliminated by using VCRS cycle.

2. State the working of following with neat sketch: 1. Compressor 2. Condenser 3. Evaporator 4. Expansion device. 3. The temperature limits of an Ammonia refrigerating system are 25°C and −10°C. If the gas is

dry at the end of compression and there is no under cooling of the liquid Ammonia. Plot the system on T-S and P-h diagram, and calculate the COP of the cycle. Use the following table for properties of ammonia

Temp°C Liquid heat kJ/kg

Latent heat kJ/kg Liquid entropy kJ/kg k

Latent ntropy kJ/kg k

25 299.0 1167.0 1.12 3.91

-10 135 1297 0.54 4093

4. Explain reversed Brayton cycle with PV and TS diagram. 5. Explain ice-plant with a neat sketch.

GROUP: - 3

1. Differentiate between: Hermetically sealed and open compressor.

2 Explain ice-plant with a neat sketch.

3. List different expansion devices used in VCRS and explain any one.

4. A refrigerator operates on a reversed Carnot cycle whose C O P is 5.0. The

evaporator is maintained at a temperature of −6°C and the power required to

run the refrigerator is 3.5 kW. Determine the refrigerating effect (RE) and the

condenser temperature of the refrigerator. 5. List the types of components used in domestic refrigerator alongwith technical

specifications.

GROUP: - 4

1. A CO2 refrigerating plant fitted with an expansion valve, works between the pressure limits of

54.81 and 20.93 bar. The vapor is compressed isentropically and leaves the compressor cylinder

at 32 C. The condensation takes place at 18 C in the condenser and there is no undercooling of

the liquid. Determine COP of the plant. Temp°C Liquid

enthalpy

kJ/kg

Vapor enthalpy

kJ/kg

Liquid

entropy

kJ/kg k

Vapor

entropy

kJ/kg k

+18 137.48 302.55 0.5065 1.0738

-18 43.27 323.66 0.1733 1.2692

2. Sketch the T-s and p-h diagrams for the vapor compression cycles when the vapor after

compression is i) dry saturated ii) wet.

3. Why in practice a throttle valve is used in vapor compression refrigerator rather than an

expansion cylinder to reduce pressure between the condenser and the evaporator.

4. Establish how an actual cycle differs from a theoretical vapor compression cycle.

5. Differentiate between : Dry expansion evaporator and Flooded evaporator.

Sr.

No.


Below

Expectations (1-3)

Meets

Expectations (4-6)

Exceeds

Expectations (7-10)




4.


Total (Out of 20)

ASSIGNMENT 4

TT – 1

CO4: Estimate air conditioning parameters for various appliances.



DEPARTMENT


GROUP: - 1 1. Differentiate between window air conditioner and split air conditioner.

2. Explain heating with humidification process on psychometric chart.

3. Sketch psychometric chart and show on it various property lines of air.

4. A certain air has DBT of 30◦ C and WBT of 20◦ C. Calculate the following using psychometric chart.

1. Relative humidity 2. Enthalpy 3. Specific humidity 4. Dew point temperature.

5. Draw diagram of a split air conditioner showing all components.

GROUP: - 2

1. Write down Carriers equation for partial pressure of water vapour in moist air with name and unit of notation used in equation.

2. State advantages, limitations and applications of vane type axial fan.

3. With a neat sketch explain window air conditioner using various components on it.

4. At 28◦C dry bulb temperature and 760 mm of mercury atmospheric pressure, the humidity ratio is 0.016 kg/kg of dry air. find

1) partial pressure of water (2)relative humidity. 5.

GROUP: - 3

1. Explain the working of air cooler with neat sketch.

2. State the difference among fan, blower and compressor. 3. State and derive relations for the following terms:

Absolute humidity, Relative humidity, Humidity ratio, Enthalpy of moist air .

4. Conduct a survey for different air conditioners of 1 TR capacity. Select the best one suitable for your

home.

5. The air at 35◦C DBT and 25◦C WBT is passed through a cooling coil at the rate of 280 m3/min. The air

leaves the cooling coil at 26.5◦C DBT and 50% RH. Find 1. Capacity of the cooling coil in TR 2. WBT of

leaving air. 3. Water vapor removed per minute 4. Sensible heat factor.

GROUP: - 4

1. 100 m 3 of air at 35◦C and 70% RH is cooled to 20◦C and 55% RH by passing it through a

cooling coil. Using psychrometric tables only, find : 1. The amount of water vapor removed in

kg/h and 2. The cooling capacity of the coil in TR. Assume specific heat of superheated vapor

in air as 1.88 kJ/kg K and R for air =287 J/kg K

2. Explain cooling and dehumidification process on psychometric process 3. With the help of a neat sketch explain Adiabatic saturation process.

4.

Sr.

No.


Below

Expectations (1-3)

Meets

Expectations (4-6)

Exceeds

Expectations (7-10)




4.


Total (Out of 20)

R.C.Technical Institute –Sola, Ahmedabad

Mechanical Department

Manufacturing Engineering-IIIAssignment -01

SrNo.

TOPIC CO TO BEATTAINED

Remarks

Introduction to manufacturing engineering-III1 Describe geometry of single point cutting tool with neat sketch. CO1/CO52 Explain the need of manufacturing engineering III. CO13 What is the importance of Manufacturing engineering –III in

industries?CO1

4 Explain the importance of machine tool technology in industries. CO15 Explain cutting speed, feed and depth of cut. CO1/CO56 Define cutting parameters and MRR. CO1/CO57 Interpret following tool designation of single point cutting tool as

per ASA. 8-14-6-7-5-15-1CO1/CO5

8 What are the characteristics of the supervisor working inmachine tools based Industries

CO1

Grinding and super finishing processes.9 Describe following grinding operation with neat sketch 1. Surface

grinding 2. Cylindrical grinding 3. Centre less grinding 4. Form orProfile grinding 5. Plunge cut grinding

CO2

10 Difference between Honing , Lapping , and Super finishingprocess

CO2

11 Define following terms for grinding wheels 1.Loading 2.glazing3.truening 4. Dressing

CO2

12 Explain center less grinding process. CO213 Suggest and explain the machine used for grinding a flat surface. CO214 Describe lapping process. CO215 Describe honing process with sketch. CO216 Suggest and explain the machine used for grinding a shaft CO217 Describe way of specification for grinding wheel as per IS-

Standard.CO2




Gear manufacturing and finishing processes.

SrNo.


Remarks

1 Give classification of Gear manufacturing process. CO32 Briefly explain Gear milling process. CO33 Draw sketch of Gear hob. CO34 List the various methods of Gear manufacturing & explain

any ONECO3

5 Differentiate Gear generating process & Gear formingprocess.

CO3

6 With neat sketch explain Gear shaping process. CO37 Explain gear shaving process CO38 Compare gear hobbing and gear shaping (generating)

processCO3

9 Justify use of gear finishing process and make a listfinishing process.

CO3

10 Suggest and explain appropriate method for gearmanufacturing in your college workshop

CO3

Thread production methods.

11 List the different types of Thread with a sketch. CO312 List the various methods of thread production& explain

any ONECO3

13 Write short note on thread chasing CO314 Explain Thread rolling process with neat sketch CO315 Explain thread cutting by die head. CO316 State the factors affecting the selection of thread

production process.CO3

17 Show the various elements of thread in the sketch of “V”thread

CO3




SrNo.


Remarks

Broaching, jig boring and special purpose machine tools.1 List applications of Special Purpose Machines (SPM). CO3

2 Explain the principle of broaching with neat sketch. CO3

3 Describe Jig boring machine in detail CO3

4 Give difference between Pull broaching and Push broaching CO3

5 List the advantages and disadvantages of broaching process CO3

6 Explain Jig boring Machine in detail with sketch and application CO3

7 Differentiate between Standard machine-tools & Specialpurpose machine tool.

CO3&CO5

8 Explain Single column jig boring machine with neat sketch. CO3

9 Classify broaching machines. Explain continuous broachingMachine.

CO3

10 Explain boring process with its working principle. CO3

11 Explain Double Column Jig Boring machine with neat sketch. CO3

Non-conventional and advance methods of machining.12 Explain, Why Non-Conventional machining methods are used? CO4

13 Give classification of Non-conventional methods of machiningand briefly explain any one

CO4

14 Difference between conventional and Non-conventionalmachining methods

CO4

15 Explain Following Non-conventional Machining methods withNeat sketch

CO4

16 1. Electro Chemical Machining 2. Electro Chemical Grinding 3.Electro Discharge machining 4. Laser beam Machining 5.Ultrasonic machining 6. Water jet machining 7. Abrasives jetMachining 8. Ion Beam machining

CO4

17 Describe need of micro-electro mechanical system.(MEMS) CO4

18 Give difference between EDM and ECM. CO4

R.C.T.I. SOLA, AHMEDABAD

MECHAICAL ENGIEENRING DEPARTMENT

COURSE: SEED [3351906] SEM: V ASSIGNMENT-1

---------------------------------------------------------------------------------- CO-1: Develop the ability to select potential areas for self-employment

and entrepreneurship. GROUP:1

a. Define the self-employment and explain advantages of it.

b. Define the term ‘Entrepreneurship’ and give its characteristics.

c. State at least six fields of self-employment in the mechanical engineering.

GROUP:2

d. Explain the concept of self-employment.

e. State the advantages of self-employment.

f. State at least six fields of self-employment in the mechanical

engineering.

GROUP:3

g. Define the term ‘Entrepreneurship’ and give its characteristics.

h. List 6 broader area of identification of self-employment in

mechanical engineering

i. Explain need for self-employment in Indian job market


Below Meets Exceeds

Sr no


[5marks each. Total 20] Expectations Expectations Expectations

(1) (3) (5)


2. Organization and style (neatness,

clarity, writing and drawing skill)

3. Quality of content (grammar error,

content connection to course)

Ability of student to answer oral questions (viva based)

4.

Total (Out of 20)

Date:-_________________

Sign. of faculty:-_________________




----------------------------------------------------------------------------------

C0-2: Identify entrepreneurial qualities through innovativeness strategies to achieve goals GROUP:1

a. Explain at least eight desired qualities of the entrepreneur. b. Explain the ways to develop innovativeness.

c. Write a short note on “Innovativeness in mechanical engineering”.

GROUP:2

d. List at least eight desired qualities of the entrepreneur

e. State the ways to develop the innovation

f. Write four elements of the ‘SWOT’ analysis

GROUP:3

g. Explain in short the 7-M Resources

h. Write short note on the Feasibility study

i. Write short note on the success criteria of the business


Below Meets Exceeds

Sr no



(1) (3) (5)







4.

Total (Out of 20)

Date:-_________________

Sign. of faculty:-_________________




----------------------------------------------------------------------------------

C0-3: Select appropriate entrepreneurial support agencies GROUP:1

j. Explain different types of the Enterprise.

k. State the functions of District Industrial Centre (DIC).

l. List the name of different support agencies of the State and

National level.

GROUP:2

m. Write a short note on “MSMEs are the backbone of the economic development of any economy”

n. Write different types of the Enterprise.

o. Define Micro, Small and Medium industries.

p. State four stages of the Product development

GROUP:3

q. Differentiate between Monopoly and Competition

r. State the name of basic methods of estimation of production capacity

s. State at least four factors affecting the process selection.

t. List the name of different support agencies of the State and National level.


Below Meets Exceeds

Sr no



(1) (3) (5)







4.

Total (Out of 20)

Date:-_________________

Sign. of faculty:-_________________




----------------------------------------------------------------------------------

CO-4: Identify risk factors through case studies for project set up and proposal planning. GROUP:1

a. Briefly explain stages of the Product development.

b. Write a note on “Technology life Cycle”.

c. Explain different methods of Risk management.

GROUP:2

d. Explain in detail important features of the Case study.

e. Define the term Marketing and state its importance

f. State the advantages of the Case study

GROUP:3

g. List different methods of Risk management

h. State the important features of the Case study

i. State the meaning of the project planning.


Below Meets Exceeds

Sr no



(1) (3) (5)







4.

Total (Out of 20)

Date:-_________________

Sign. of faculty:-_________________

R.C.TECHNICAL INSTITUTE SOLA, AHMEDABAD

MECHANICAL ENGINEERING DEPARTMENT COURSE NAME: DESIGN OF MACHINE ELEMENTS

COURSE CODE: 3351902

ASSIGNMENT-1

CO1: Calculate various dimensions of simple machine elements considering different

failures using standardization.

1) In a machine tool 8 different speeds are required. If the maximum and and minimum

speeds are 710 RPM and 50 RPM respectively, determine the 8 standard series.

2) Identify the following materials: 1)49 Cr 1 Mo 28 2) FG200

3) What is stress concentration?

4) Determine the six spindle speeds of the machine having minimum speed 224 rpm and

maximum speed of 710 rpm.

5) Determine the force required to cut the 60mm diameter blank from 5mm thick plate.

Ultimate shear stress for the plate material is 350 N/mm2

ASSIGNMENT-2

CO2: Design simple machine elements subjected to various loading conditions i.e. direct

stresses

1) Design knuckle joint for maximum load of 10 KN, σt =80 N/mm2, τ = 50 N/mm2, σcr = 35

N/mm2.

2) Two 12 mm thick plates are joined with single riveted lap joint using 15 mm rivet

diameter. If the pitch for the rivet is 50 mm, determine the strength of the joint. [τ] = 90

N/mm2, [σc] = 160 N/mm2.

3) Determine the following dimensions of a cotter joint to resist axial load of 30000 N.

Thickness of cotter (1/4 of rod diameter)

Inner diameter of socket

Collar diameter of spigot end.

Take [σt] = 55 N/mm2

[τ]= 45 N/mm2 [σc] = 100 N/mm2

4) A solid shaft is transmitting 1 MW power at 240 rpm. Determine the diameter of shaft if

maximum torque transmitted exceeds the mean torque by 20%. Maximum shear

stress=60 MPa.

5) A C.I flanged coupling is transmitting 11 KW at 500 RPM permissible shear stress for

the shaft and bolt material is 60 MPa and 40MPa respectively, permissible crushing

stress for the both is 100 MPa and permissible shear stress for hub material is 6 MPa.

Design for 25 % overload capacity. Determine shaft diameter, Diameter of Hub, No. Of

bolts, bolt diameter. Take necessary assumptions.

6) The compressive load on a screw jack is 50 KN safe compressive stress is 100MPa, pitch

of the single start square thread is 8 mm. Allowable bearing pressure is16 MPa.

Find: a)Size of the screw,b)Height of nut,c)Shear stress induced in nut

7) Design the fulcrum pin for a bell crank lever to lift 15 KN vertical load acting at the end

of the shorter arm. The length of the longer and shorter arms is 700 mm and 500 mm

respectively. Allowable shear stress and bearing pressure for the pin is 70 N/mm2 and 10

N/mm2 respectively. Take L/d=1.25.

ASSIGNMENT-3

CO3 Calculate basic dimensions for thin and thick pressure vessels.

1) A hydraulic press is cap[able to produce 50 x 104 N maximum force. Working pressure

of fluid is 20 N/mm2. Determine the diameter of the plunger operating the table. For the

permissible stress of 100 N/mm2 for the cast steel cylinder in which the plunger

operates, find the suitable thickness required. 2) A cylinder with 150 mm inside diameter and 15 mm plate thickness is subjected to

internal pressure of 5 N/mm2. Determine: (i) Hoop stress (ii) Longitudinal stress

(iii)Maximum shear stress in the cylinder 3) A hydraulic type testing machine has a capacity of 1000 kN. The piston diameter is 250

mm and maximum permissible stress for the cylinder is 100 Mpa. Determine the

thickness of the cylinder. ASSIGNMENT-4

CO4 Select appropriate bearing for different applications.

1) Explain the following terms related to antifriction bearings. (i) Rating life (ii) Average

life (iii)Basic static capacity (iv)Basic dynamic capacity

2) A ball bearing is subjected to radial load of 10 KN and thrust load of 4 kN. The inner race

of the bearing rotates with 1000 rpm. Expected average life of bearing is 5000 hrs.

Determine the required basic dynamic rating for the bearing. Take X=0.56; Y=1.2;

S=1.5 and K=3.

3) The basic load rating for the selected bearing is 50 kN. If the expected bearing life is

6000 Hours. Calculate the permissible equivalent load for the bearing at 500 rpm. K=3.

4) A deep groove ball bearing having SKF 6309 number is rotating at 1500 rpm. The

bearing is subjected to radial load of 8500 N and thrust load of 5500 N. The inner race

of the bearing rotate with shaft. Find the rating life and average life of the bearing. the

dynamic capacity of the bearing is 41500 N and the bearing is in continuous service

.Take X= 0.56 & Y=1.3

R.C.TECHNICAL INSTITUTER.C.TECHNICAL INSTITUTER.C.TECHNICAL INSTITUTER.C.TECHNICAL INSTITUTE

MECHANICAL ENGINEERING DEPARTMENTMECHANICAL ENGINEERING DEPARTMENTMECHANICAL ENGINEERING DEPARTMENTMECHANICAL ENGINEERING DEPARTMENT

SUBJECT: INDUSTRIAL ENGINEERING (3351904)SUBJECT: INDUSTRIAL ENGINEERING (3351904)SUBJECT: INDUSTRIAL ENGINEERING (3351904)SUBJECT: INDUSTRIAL ENGINEERING (3351904)

ASSIGNMENTASSIGNMENTASSIGNMENTASSIGNMENT 1111

CO 1CO 1CO 1CO 1 Describe productivity using work study and method study techniques.Describe productivity using work study and method study techniques.Describe productivity using work study and method study techniques.Describe productivity using work study and method study techniques.

GROUP 1

1. Industrial engineering is a vital part of industry. Justify your answer.

2. State the various techniques of Industrial Engineering

3. Explain flow process chart with an example.

4. Calculate standard time from following data for one cycle:

Loading time = 1.82min.

Machining time =6.25min.

Unloading time =0.77min.

Inspection time =0.56min.

Overall rating of the cycle =90%.

Over all allowances =10% of basic time.

5. What is PMTS? Explain in brief.

GROUP 2

1. How industrial engineering helps to increase productivity? Justify your

answer.

2. Describe the symbols used in FPC with examples of each.

3. Calculate standard time from following data for one cycle:

Loading time = 3min.

Machining time=8min.,

Unloading time =1min.,

Inspection time =2min.,

Overall rating of the cycle =110%,

Over all allowances =10% of basic time.

4. List the various allowances in time study and explain any one in brief




5. State the objectives of method study

GROUP 3

1. Briefly describe how the productivity can be increased.

2. State use of man machine chart and write colours/symbols used in this chart.

3. (a) Production rate needs to be 12 units an hour. The allowances assigned are

25%. If rating given is 80% for the activity. Find the time recorded for the

operator by rater.

(b) The average observed elemental time: 12 min., average observed rating:

90%, total allowances: 10%. Find standard time

4. Differentiate: OPC v/s FPC

5. State any four Therbligs with symbol, Abbreviation, Color code of each.

GROUP 4

1. Enlist the Factors influencing the productivity

2. Write a note on String Diagram with neat sketch and state its uses.

3. Explain man and machine chart with an example

4. Briefly describe various types of allowances used in Time Study.

5. (a) The observed time is 20min.rating factor is1,contingency allowance is 5%

Find the standard time.

(b) A worker completes a work element in 0.16 min. If the rating given to him is

125% then calculate the basic time What will be the standard time with 0%

allowance.

6. Sketch the Symbols used in Two Handed Process Chart with name.

GROUP 5

1. Describe step by step procedure of Method study.

2. Describe step by step procedure of Work study.




3. State the principles of motion economy

4. State any four Therbligs with symbol, Abbreviation, Color code of each.

5. (a) The observed time is 20min.rating factor is1,contingency allowance is

5% Find the standard time.

(b) A worker completes a work element in 0.16 min. If the rating given to

him is 125% then calculate the basic time What will be the standard time

with 0% allowance.

GROUP 6

1. Discuss the need of flow diagram.

2. Explain in brief about basic procedure of method study.

3. Define Industrial Engineering. State at least Six Techniques of Industrial

Engineering.

4. Sketch the Symbols used in Two Handed Process Chart with name.

5. FIND out the standard time using following data:

Average time of machine element 6 min

Average time of manual element 4 min

Performance rating 110%

Allowances 10%




ASSIGNMENT 2ASSIGNMENT 2ASSIGNMENT 2ASSIGNMENT 2

CO 2 Apply Statistical Quality Control tools in a given situationCO 2 Apply Statistical Quality Control tools in a given situationCO 2 Apply Statistical Quality Control tools in a given situationCO 2 Apply Statistical Quality Control tools in a given situation.

GROUP 1

1. Write quality assurance tools and state their importance.

2. Definition of quality, Quality control (QC), Quality assurance (QA), statistical

quality control (SQC) and reliability.

3. Explain concept and importance of SQC.

4. Differentiate between inspection and quality control.

5. Find mean and standard deviation from given data in table.

Class 1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40

freque

ncy

5 10 14 22 13 10 5 3

GROUP 2

1. From the data given below find mean and standard deviation.

class 0-4 5-9 10-14 15-19 20-24 25-29 30-34

freque

ncy

5 10 15 20 14 11 6

2. Draw frequency polygon using following data.

Seed

Yields

(gms)

2.5-

3.5

3.5-

4.5

4.5-

5.5

5.5-

6.5

6.5-

7.5

7.5-

8.5

8.5-

9.5

9.5-

10.5

No. of

plants

4 6 10 26 24 15 10 5




3. Draw normal distribution curve and explain it in brief.

4. Explain Concept of total quality cycle, quality of design, quality of

performance, quality of conformity and total quality.

5. State types of control charts and explain C-chart.

Group 3

1. A batch of 100 products was inspected. Out of which 85 products were

found as per specification and 15 products were rejected, then what will be

the probability of acceptable and rejected products?

2. Calculate mean, mode, median and spread for observations 7, 8, 4, 3, 6, 9,

4, 5.

3. Explain total quality cycle.

4. Define acceptance sampling and explain its advantage and disadvantages.

5. Differentiate between attribute and variable quality

GROUP 4

1. Explain Double Sampling plan.

2. Differentiate variable and attribute control chart.

3. State the techniques of S.Q.C.

4. During the production of I.C. Engine 10 engine were inspected and defects

in each engine were as under

Engine

no

1 2 3 4 5 6 7 8 9 10

No of

defects

3 5 6 4 7 2 8 5 10 5

Calculate control limits for “C” chart.

5. In X-R chart upper control limit is 52.50 and is 48.25. If subgroup size is




GROUP 5

1. For observing 10 samples of 100 each defective pieces noted as

6,8,9,5,10,8,4,7,11,9 find out control limits for appropriate chart.

2. Calculate process capability from following data. X -R = 25 , No of samples

inspected N = 10, d2 = 2.059

3. find the following (i) Lower control limit of - chart. (ii) Control limits of R-chart.

[ constants- A2 =0.729, D3=0, D4= 2.282 ]

4. Define Quality Control (QC) and Quality Assurance (QA)

5. List various Statistical Quality Control (SQC) tools.

6. Explain in brief Total Quality Management (TQM)

7. Explain critical examination.





CO 3 . Select material handling equipment for effective plant layout.CO 3 . Select material handling equipment for effective plant layout.CO 3 . Select material handling equipment for effective plant layout.CO 3 . Select material handling equipment for effective plant layout.

GROUP 1

1. Define the term Plant Layout.

2. State the types of Plant Layout.

3. Discuss briefly any one Plant Layout with neat sketch, advantages as well as

limitations.

4. Differentiate process layout and product layout w.r.t. plant layout.

5. Which type of plant layout is required for production of standard product &

for mass production? Justify your answer.

6. How material handling system is important in industry?

GROUP 2

1. Which factors to be considered during selection of plant layout?

2. State advantages and limitation of product type plant layout

3. Explain product layout with advantages and disadvantages.

4. Explain process layout with advantages and disadvantages.

5. Explain process layout with example.

6. Classify different types of material handling equipment with example.

GROUP 3

1. Describe importance and application of material handling equipment.

2. Explain relation between plant layout and material handling.

3. Explain features of good material handling system.

4. How material handling system is important in industry?

5. Classify material handling equipment.




6. List various types of plant layouts.

GROUP 4

1. State at least one material handling system of each class.

2. Define the term Plant Layout. Enlist the Principles and characteristics of a

good plant layout.

3. Discuss briefly any one plant layout with neat sketch, advantages as well as

limitations.

4. Explain effect of method study on material handling

5. Which type of plant layout is required for job production? Justify your

answer.

GROUP 5

1. Write the names of any 4 material handling equipment

2. State the objectives of plant layout.

3. List various points to be kept in mind while designing workplace.

4. Explain effect of method study on plant layout

5. Which type of material handling equipments are used in hydel power plant?





CO4 Explain the importance of ergonomics and recent trendsCO4 Explain the importance of ergonomics and recent trendsCO4 Explain the importance of ergonomics and recent trendsCO4 Explain the importance of ergonomics and recent trends

GROUP 1GROUP 1GROUP 1GROUP 1

1. What is Ergonomics?

2. Write short note on Anthropometry

3. Explain the importance of ISO 9000

4. Explain in brief TQM.


1. Write short note on Just in Time.

2. Write short note on Re-engineering

3. What is mean by kaizen?

4. Explain in brief TQC.

GROUP 3 GROUP 3 GROUP 3 GROUP 3

1. Explain six sigma concept.


3. Write short note on zero defect.

4. Explain concept of Re-engineering.


1. What is reliability? EXPLAIN


3. What do you mean by JIT

4. What is ergonomics? Write the objectives of ergonomics


MECHANICAL ENGINEERING DEPARTMENT

SUBJECT: ESTMATING, COSTING AND CONTRACTING (3351905)

ASSIGNMENT

CO 1. Calculate catalogue price of engineering product.

1. List difference between costing and estimating.

2. Write formula of methods to calculate depreciation.

3. List methods of Overhead allocation

4. Draw block diagram of Selling price and Catalogue price

5. Catalogue price of Shaper machine is Rs. 50,000. Distributor is given discount of 10%.

Office overhead + sales over head = factory cost, Material cost: Labour cost: Factory

overhead = 1:3:2 & labour cost is = Rs. 9000, find profit on Shaper.

6. Define:(1) Prime Cost (2) Factory Cost (3) Production Cost (4) Market value

(5) Book Value, (6) Scrap Value, (7) Salvage Value.

7. List and explain different elements of cost.

8. A tablet producing company is daily producing 120 tablets. Direct material cost is Rs.

180000 and direct labour cost is Rs 120000. Factory overheads are 40% of direct labour

cost. Administrative overheads are 20% of factory cost. Sales and distribution overheads

is 30% of production cost. If the profit per tablet is Rs. 300, then Find the selling price of

one tablet.

9. A m/c was purchased at Rs.3000/, the transportation and installation charges are

Rs.400/ and Rs.600/ respectively. Useful life is 8 years scrap value is 300.rate of

depreciation fund is 12 %. find the rate of depreciations per year by straight line &

Sinking Fund method.

CO 2. Apply break even analysis to get optimum production level.

1. Explain with sketch effects of changing following parameters on Breakeven point:(i) If

fixed cost F decreases (ii) If variable cost V increases

2. The fixed cost of a company is Rs. 8, 00,000. Selling price of unit is Rs.500 and variable

cost of unit is Rs. 300. Determine total profit and Safety margin when total production is

18,000 units.

3. A factory has fixed cost of Rs. 10000. Variable cost/product is Rs. 2. Selling price

/product is Rs. 4. Find breakeven point. Calculate margin of safety if net actual sales is of

8000 units. Also calculate sales target if the factory must earn a profit of Rs. 6000.

CO 3. Estimate cost for various conventional manufacturing processes.

1. Define the terms with unit: cutting speed, feed.

2. List elements of cost & factors effecting Gas welding.

3. Two flat plates each of 200 cm long, 10 cm wide, 1 cm thick are joined in such a way that

a plate of approximate size of 200 cm×20 cm×1 cm size is produced. Neglecting edge

preparation cost, estimate the total material cost of welding. Assume (1) cost of O2= Rs

1.2/ m3. (2) Cost of C2H2= Rs 6/m3. (3) Cost of filler material=Rs 3/kg. (4) Consumption

of O2=1 m3/hr.(5) consumption of C2H2=1 m3/hr. (6) filler rod diameter=5mm. (7)

length of filler rod required=4.5m/m weld (8) density of filler rod=9 gm/C.C. and (9)

Welding speed is 2 m/hr.

4. Two 4 m long plate is welded by manually flux shielded metal arc welding process. Find

total welding cost by use following data. Welding speed-10 m/h, Operating fector-60 %,

Labour charge- Rs.15/h, Use of electrodes-0.4 kg/meter welding length, Electrodes

price-.80/kg, Arc voltege-22V, Arc Courent-200 I, Transformercapacity-60%, Power

charge-Rs.5/KW.

5. A cylindrical boiler 2.5m height & 1.2m diameter is made from 15mm thick plate.

Circular ends & cylindrical length is welded. Welding is to be done both inside & outside.

Find the cost of arc welding from the data given below. Welding speed = 2.5 m/hr

outside Labour cost = 15 Rs/hr Welding speed = 2 m/hr inside Use of power = 4kwh/m

weld Use of electrode = 1.5 m/meter weld Cost of power = 4 Rs/kwh Wasted electrode=

5% of used electrode Wasted time = 5% of weld time ,Cost of electrode = 15Rs/meter

Overhead cost = 2times of labour cost.

6. Explain any five-sheet metal operation with sketch.

7. Define forging. Explain different types of forging losses.

8. A square bar of 4cm side and 40 cm length is to be converted by hand forging into bar of

hexagonal cross section having each side equal to 3 cm. calculate the length of

hexagonal bar produced. Consider 6% scale loss of total volume.

9. A square bar of 5 mm side and 40 cm length is to be converted by hand forging in to a

bar of hexagonal section having each side equal to 3 mm calculate the length of

hexagonal bar produced.

10. A 15 cm long M.S. bar is to be turned from 4cm dia. In a single cut to 3.8 cm dia. For first

5 cm length and to 3.4 cm for next 10 cm length. If cutting speed is 45 m / min and feed

is 0.02 cm / rev, and required setting and mounting time of job in three jaw chuck is 45

sec, estimate the total time required for turning

11. Estimate time required to drill 6 holes of 1 cm. diameter in a plate. Depth of hole =2 cm,

Cutting speed = 15 mtr/min & feed = 0.01 cm/rev.

12. Determine time required for preparing M.S. bolt M20 x 3 mm by single point cutting tool

with a cutting speed 8m/min and length of threaded portion is 40mm. Consider No. of

cuts required for threading is 8.

13. A 20 cm × 6 cm C.I. surface is to be faced on a milling machine with a cutter having 8 cm

diameter and 12 teeth. If the cutting speed and feed are 40 m/min and 4 cm/min

respectively, determine the milling time, R.P.M. of cutter and feed per tooth. Assume

over run is 0.70 cm.

14. A slot of 2 cm deep and 10cm long is to be cut in a M.S. job with a milling cutter of 8 cm

diameter & rotating at 120 rpm. If milling is done in 2 cut and feed per revolution is 0.05

cm., then calculate the milling time.

15. Find the time for surface finish of a job 20cm×20cm size on shaping machine in two cut.

If cutting speed is 10meter/min. and feed 0.06mm/stroke.

16. Estimate the time required to shape a keyway 40 cm long,1 cm wide and 0.5 cm deep in

a C.I machine part. Assume1) Cutting speed for shaping = 10 m/min2) Feed = 0.08 cm

/Stroke3) Depth of cut not to be exceed = 0.25 cm.

17. One shaft has 20 cm length and its diameter is reduced from 4.2 cm to 4 cm by grinding

process, find time of grinding process by use following data. Wheel face width = 2 cm,

Cutting speed = 16.5 m/min, Depth of cut= 0.25 mm.

18. Top of a cast iron table of size 40 cm X 100 cm is to be ground by a wheel having 2.5 cm

width. If the feed is ¼ of the width of the wheel and table moves 8 m/min, find the time

required for grinding in 3 cuts.

19. Find out the cost of 1500 C.I. pulley as shown in figure (1). After casting all the surfaces

are to be machined. Use the data as follows I. Metal cost- Rs. 3 per kg II. No of moulds

per day- 20 per moulder III. Melting charges-20% of material cost IV. Machining

allowance on each surface- 2mm V. Wages of moulder- Rs. 15 per day VI. Density of cast

iron – 7.2 grams per c.c VII. Overhead cost- 35% of material cost.

20. Find the cost of C.I. pulley 1000 cm3 volume. Use following data (Pattern is supplied by

the customer): I. Cost of metal- Rs. 25 per kg II. Wages of moulder – Rs. 150 per day III.

Overhead cost- 10 % of material cost IV. Melting charges- 15 % of material cost V. No of

moulds per day- 30 per moulder VI. Density of cast iron – 7.2 grams per c.c

21. List modern tools & techniques of cost reduction.

22. Explain in brief area of cost reduction.

23. A diesel power plant has a capacity of 1800 kW. Its pick load and load factors are 1700

kW and 85% respectively. Estimate power generation cost of this plant. Assume

1. Capital cost- Rs. 900/kW. 2. Interest on capital-10%. 3. Operating cost/year Rs.

60,000. 4. Fuel consumption- 0.4 litre / kWh. 5. Fuel cost- Rs.40 per litre.

24. A thermal power plant produces 80 Mw to satisfy maximum demand. Load factor of

plant is 40%. Estimate power cost per unit for power produced by this plant. Operating

cost Rs. 1.94/kwh.(Assume capital cost as Rs.1800 per kw and depreciation is 12%)

25. The cost of active wheel washing powder packed in 1 kg. pouch is Rs.26. The plastic

material for pouch cost Rs.1 per pouch. An operator is packing 500 pouches in a shift of

8 hours. If operator is paid Rs.150 per 8 hours shift. Estimate pouch packaging cost

assuming interest & depreciation. Power cost per pouch is Rs.0.15.

CO 4. Prepare budgets and engineering contracts related to mechanical domain.

1. State Need, Scope and importance of Contracting in industries.

2. Define "Budget" & Budgetary control and Write type of budget and explain any one.

3. Explain documents required for engineering contract.

4. Explain various types of budget in brief.

5. Write types of contract and general conditions of contract.

6. Write a short note on e-tendering.

7. List various types of tenders and explain any one.

R.C. TECHNICAL INSTITUTE, AHMEDABAD MECHANICAL …

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