The Winning File of Ankit for Steam Epariksha April 2014

1.What will you do while Soot Blowing? MANDATORY

Raise the boiler firing rate

Lower the boiler firing rate ok

Do nothing

2.Steam at 45 t/hr, 60 bar, 510 C. What can be the configuration of astern turbine?

One Curtis of 4 row

2 curtis of 2 row each ok

6 rows

10 rows

3.For astern running, direction of turbine is reversed by- MANDATORY QUESTION

Admitting steam to a separate turbine connected to same shaft of one of the ahead

turbine

4.During maneuvering , how is condenser vacuum kept low?

Throttling one or more air ejector valve to reduce air ejector steam

Allowing air from glands ok

Cooling water output

5.During maneuvering , Y is condenser vacuum kept low?

To Prevent distortion of rotor ok

6.During Preheating ,vacuum is kept minimum why?

To Prevent distortion of rotor ok

7.Why is vacuum kept high in condenser (MCQ- MORE THAN ONE)

Steam condenses at lower temperature

Steam flow is directed towards condenser

Max heat is utilised

Steam entering condenser hits condensate at bottom readily

It is apparent that the greater the vacuum obtained, the lower will be the temperature of the

steam. The lower the temperature of the steam in the condenser, the more heat we have

available for conversion into mechanical energy in the engines.

After the steam leaves the exhaust section of the turbine, it enters a condenser, where it is

cooled to its liquid state. The process of condensing the steam creates a vacuum, which then

brings in more steam from the turbine

8.Why is Vacuum condenser used? MANDATORY QUESTION

preventing steam from becoming liquid at the end of turbine ok

easy air and non condensable gases removal

High Efficiency

Ease of Flow

9.If steam pressure is reduced at inlet of heat exchanger then- MANDATORY QUESTION

Steam temp increases ok

Steam temp reduces

Steam temp remains same

5 What effect does lowering the steam pressure have?

a) The steam temperature rises

b) It has no effect on the temperature but increases the latent heat

c) The steam temperature falls

d) The total heat in steam increases

10.If a h/e stops working what does that signify?

Steam inlet pr is low

Steam inlet pr is equal to or less than steam outlet pressure.

What is the prime cause of stall in heat exchangers?

a) Not enough steam pressure upstream of the control valve

b) The heat exchanger pressure is equal to or less than the backpressure

c) The heat exchanger is undersized

d) The condensate discharges to atmosphere

@ spirax sarco Stall is the reduction or the cessation of condensate flow from the heat exchanger,

and occurs when the pressure in the heat exchanger is equal to, or less than, the total backpressure

imposed on the steam trap.

11.For same inlet pressure of steam, steam flow rate reduces for bigger heat exchanger because-

MANDATORY QUESTION

More surface area for heat exchange

Steam pressure is less and so enthalpy of evaporation is more

V/v inlet is small

Evap. temp. Low

3 For the same heat load on two heat exchangers, why is the mass flowrate of steam

always less in the exchanger with greater heating surface?

a) Because the control valve is smaller

b) The steam pressure is less and so the enthalpy of evaporation is more

c) Because there is more heating area in the oversized exchanger

d) The steam pressure is less and so the steam will be drier

12.What happens to steam pipeline size after pressure reducing valve MANDATORY QUESTION

Reduces since steam volume is less at lesser pressure

Increases since steam volume is more at lesser pressure ok

Remains same

6 The steam pipe after a pressure reducing valve is likely to be:

a) Smaller than the upstream pipe because of the smaller volume of low pressure steam.

b) The same size as the connection to the plant.

c) Larger than the upstream pipe because the volume of the low pressure steam is

greater.

d) The same size as the upstream pipe because the flowrate through each pipe is the

same.

13.Where do u take bleed steam from? (MTOA)

HP Turbine + LP Turbine

After LP

Crossover Pipe ok

??????

14.Boiler efficiency is determined by NON MANDATORY

Fuel injected and shaft power

Heat input and power

Steam pressure ....... ok

Steam flow n heat input

15.In BCC system which has feedback from steam pressure, feed forward is provided from

Dump steam

Condensate temp ok

Steam flow rate

16.In single element feed control system if value of steam flow increases, then feed water flow

MANDATORY

Increases ok

No change

Decreases

17.Shrink and swell compensation?

feed fwd

feed back ok

feed fwd and feed back

cannot be compensated

18. Preheating of turbine is done by

Gland steam

condenser

Aux stop valve

Main ahead stop valve

19.Preheating of steam turbine is done slow and prolonged to- (MCQmore than one)

Allow uniform heating of turbine casing

Maintain gap between moving and fixed blades

Reduce differential temperature within casing

Reduce the gap between moving and fixed blades.

20.Why do we open steam v/v slowly? (MCQmore than one) MANDATORY

prevent water hammer

prevent thermal shock doubt

drain condensate

see whether any leaks

21.More reliable method of testing Steam trap

Sight glass

Gauge glass ok

Temperature sensing device

Integrated steam trap sensor or separate chamber got on net

22.Why is steam trap not checked by temp sensing device MANDATORY QUESTION

It is expensive

It is injurious to health ok

Temp of steam changes with pressure

Temp of steam and water is same got on net

23.How many pockets in labyrinth seal of HP and LP Turbine MANDATORY QUESTION

0

2

3

4

24.In gravity type LO system, pressure sensing device is provided to MANDATORY

Ensure enough LO pressure at turbine

Ensure adequate lubrication of turbine

Both A and B

Neither A nor B

25.Advantage of regenerative(there are moving parts) air preheater over recuperative(no moving

parts) air preheater?........

Less bulky

More corrosion resistant ok

Easier to manufacture

Doesnt allow air temp to rise to an abnormal level

26.Why is air preheater used/WHY IS AIR PREHEATED? MTOA MANDATORY QUEST

For better combustion

Boiler Efficiency improves

To prevent thermal shock to furnace ok

To prevent corrosion

27.In Reheat cycle boiler,reheat steam after passing through _____ and ______ is taken back to

boiler and reheated before entering subsequent stages of ahead turbine MANDATORY QUESTION

Superheater ,HP turbine

Economizer, Astern Turbine

Superheater, economizer ok

Superheater, attemperator

28.Why is air heater in uptakes more prone to fire (MCQmore than one) MANDATORY

More oxygen

High temperature

Soot deposit

Proximity to furnace

29.Economizer tube material?

CI gill section ok

Mild Steel/Low Carbon steel

30.Whre is deaerator in a 4 stage feed heating system

At 1st stage of discharge of condensate pump

At 2nd stage feed heater

At 3rd stage ok

At 4th stage before entry to boiler

31.Position of Deaerator at top? MANDATORY QUESTION

To provide NPSH required

32.How is air removed from condenser? (MCQmore than one)

by cooling down the steam

by using steam in the air ejector ok

using water as a motive fluid for air ejector

daltons principal of partial pressure (this option may or may not be correct depending upon

what is written in the question)

33.How does air ejector remove air?

Uses steam

Uses cooling water ok

Uses condensate

Improves cooling water flow

34.Function of ejector in a condenser is (MTOA) MANDATORY

To allow steam to pass through to eject air

To allow feed water to pass through to eject air

To allow cooling water to cool

To allow cooling water to pass through to eject air

35.What information is provided on safety valve (MCQmore than one

Lifting pressure

Capacity-flow rate ok

Reseat press

Standard no

1 Which of the following information is not normally included on the safety valve marking plate?

a) Set pressure

b) Relieving pressure

c) The relevant standard number

d) Information relating to the capacity of the valve

36.Why safety valves are in pair (MCQmore than one) MANDATORY

One is at a higher pressure than the other

One is at a lower pressure than the other

One cant handle all the steam flow

If one fails, other will open

37.When safety vv is overhauled,the end of the spindle is MANDATORY

Rigidly connted to vv lid

is lapped in the recess of the valve seat after grounding the seat by carborundum paste

Ground

Kept detached from vv lid while assembly

38.What type of reduction gear used in turbine? MANDATORY

double helical and double reduction

Single helical ok

39.What type of reduction used in turbine?

Helical ok

40. Flexible coupling in turbine is installed between

turbine and pinion ok

41. If before you take over the watch, you see that there is no water level in the gauge glass,what

will u do?

Inform duty engineer

Secure the fire ok

42.Purpose of economizer?

To increase Main propulsion plant efficiency ok

To reduce the size of boiler

5 What is the purpose of an economiser ?

a) To cool boiler exhaust gases to below dew point

b) To reduce the amount of energy required in the production of steam

c) To enable more steam to be produced from a boiler

d) To utilise heat from boiler exhaust gases

43. Sea water is leaking in condenser then? (MCQmore than one)

Chloride content increases

Vacuum falls

Condenser temp increases

Condenser temp decreases

44.What cant be used as IG on LNG Ships?

IG from boiler ok

Pure Nitrogen from shore

45.Why is steam line occasionally drained before entering the ahead turbine (MCQmore than one)

MANDATORY

To allow steam to come out

Water in steam can damage blades of turbine ok

There is a possibility of water hammering

46.Where is steam drain from FO tanks lead to

Observation tank ok

47.Steam line is drained to

Prevent water hammer ok

Remove dirt in line

48. ESRD Boiler(ESD type with reheat) , reheated tube is protected by.gas damper (fill in the blanks)

MANDATORY

49. How many gauge glasses are required and why at different levels? MANDATORY QUESTION

2,for compensating rolling-pitchng

50. When load decreases, what happens

Fuel decreases at a rate faster than air

51. When the boiler load is increased air is increased first and then fuel and vice versa. Why?

MANDATORY QUESTION

part of feed fwd control

to avoid incomplete combustion

fast response

for stablity

52.Chloride test-what all is added and what is the color?

N/35 of silver nitrate;reddish brown

53.Why is hydrazine handled properly?

Toxic n carcinogenic ok

54.What will happen if hydrazine is added to Low Pressure bOiler?

Reduces oxygen

Breaks down to ammonia

Copper Nitrate

55.What is done in high pressure boiler to remove oxygen? MANDATORY

Hydrazine added ok

Sodium sulphite added

Feed water taken to boiling point in feed heater

All of the above

56. In N/50 H2SO4, strength of conc is MANDATORY QUESTION

1/50 of normality

50 times normality ok

50% of normality

None of above

57.What does N mean in N/50?

Normality ok

58.Purpose of blowdown valve? (MCQmore than one........ not sure about this)

To remove deposits

To empty the boiler ok

Legal requiremen

Fill up the Boiler

59.Blowdown sequence

Open ship side then boiler side ok

Open boiler side then ship side

60.HP turbine is entirely impulse-reaction type MANDATORY QUESTION

True ok

False

61.Steam Bleeding from HP Turbine increases the turbine speed MANDATORY QUESTION

True

False

62.Manoeuvring can be done for more than 2hrs continuously

True

False

63.Does bleeding steam improve efficiency of plant

Yes

No

64.In Reaction turbine, Pr. Drop takes place in the nozzle and in the blades

True

False

65.Are all the sodium salts soluble?

Yes

No

66. HP Turbine gland is not sufficient for LP turbine gland pocket in low load condition?

True

False

67.What is open feed system?

Where u allow air to enter

Where u dont preheat the water

68.What is closed feed system?

Where u dont allow the air to enter ok

Where u preheat the water

69.Meaning of cross compounding? Mandatory question

HP n LP connection using a crossover pipe ok

70.Purpose of attemperator and desuperheater?

71.Disadvantage of regenerative and recuperative air preheater?

Attemperator- maintains the superheat; desuperheater- reduces the temp of superheated steam

72.Flow of cooling water through condenser?

Axial OK

radial

73.Why is steam passed through a strainer before passing PRV? MTOA MANDATORY

To prevent any impurity

To prevent any insoluble impurity OK

To prevent water from passing through

Strainer Strainers arrest any dirt before it is able to pass into the pressure reducing valve

74. In cross compound turbine, set of nozzle at beginning of HP turbine casing is spread over?

NON MANDATORY

An arc of periphery depending on no of sets of nozzles

Entire periphery ok

Abt 180 deg of peripehery

Abt 270 deg of peripehery

75. Gland steam in LP Turbine is required so that

No air leaks in turbine

NO steam leaks out of turbine

Both

None

76. Air is preheated in (MCQ- more than one) MANDATORY QUESTION

Economizer

Air heater OK

Boiler Casing

Air register

77. Joint material between turbine is

Chart paper

Reinforced heat and pressure resistant Metal to metal contact

Reinforced heat resistant

None

78. Gauge glass is blown through for (MTOA)

To ensure cocks are clear ok

Correct level is shown

To Ensure water level is above heating surface

79. Chemicals are added in boiler

As dissolved in small quantity and added to feed water going to the boiler

As dissolved in small quantity and added to boiler in one shot

80. In safety vv overhaul, the bottom side drain is

Kept open

Kept plugged

Connected to a drain pipe

Connected to a drain pipe and pipe is made clear

81. Low Pressure steam is obtained from (MCQ--- more than one)

Steam reducing vv

Low pressure boiler

Steam to steam generator

PRV

82. 2 Feed vv is placed in series at the inlet of the boiler to-

One is a non return vv which will prevent back flow of water in case the pipe ruptures

Both can be used to control the feed flow ok

Only one is used at a time

83. Cooling water flow through the condenser (MCQmore than one NON MANDATORY

Is just sufficient to take the latent heat away

Is kept as high as possible to cool the condenser ok

Cannot be adjusted as the capactity of the pump is the same

Is adjusted commensurate with the outlet temp of the cooling water

84. Outlet of the steam trap is partially chocked

Capacity of steam trap will reduce ok

Increased differential pressure on steam trap

85. Pressure drop in steam distribution pipeline is due to MANDATORY QUESTION

Frictional loss and heat loss

Pipeline is meant for lesser pressure ok

Pipeline is meant for higher pressure

Due to distribution

5 Which of the following results in pressure losses in distribution pipework?

a) Sizing the pipes on low pressure instead of high pressure.

b) Frictional resistance within and heat loss from the pipe and fittings.

c) Sizing the pipes on start-up load of the plant.

d) Large steam users.

86. Feed water is preheated to

Less thermal shock while entering furnace

So that bleed steam can be used ok

So that only latent heat is required from the boiler

All of these

87. Steam entering HP turbine is dry and superheated .Why? (mcqmore than one) MANDATORY

It doesnt contain water which is injurious to blades

It contains more enthalpy than saturated steam ok

It doesnt condense readily in steam pipeline

It doesnt condense till it reaches the condenser

88. Steam turbine plant efficiency is increased by

Bleeding steam in stages from turbine ok

89.Protecting material on Economizer tubes is

CI gills ok

90. During warming up, the vacuum is kept at maximum

True

False ok

91. Boiler level control is

Feed back with feed forward signal

Feed forward control with feed back signal ok

Only feed back signal

Only feed forward signal

92. NaOH reacts with : MANDATORY QUESTION

MgCl2

CaSO4

NaCl ok

Na2SO4

93. A combustion control system-air is always kept more than required during load changes :

To avoid incomplete combustion

For more stable operation @spirax sarcoTo ensure complete combustion, an

amount of 'excess air' needs to be provided. This has an effect on boiler efficiency.

For quick response

Part of feed forward system

94. Function of a nozzle is :

to convert enthalpy into kinetic

95. gland packing avoids steam leak at LP side and air leak at HP side of turbine?

True ok

False

96. gland sealing in LP turbine is required why?

no air enters turbine

no steam leaks from turbine ok

neither of them

both

97. Air is Preheated in boiler . why? (mcqmore than one) MANDATORY QUESTION

To improve combustion

To effectively utilise bleed steam

To improve thermal efficiency

98. Disadvantage of regenerative type to recuperative type is MANDATORY

Heavy and occupies more space

Less efficiency

Easily corroded ok

Leak through air seal

99. During sea running conditions, direct contact type feed heater normally receives steam from:

(mcqmore than one)

Feed pump exhaust

Bleed steam ok

Pressure reducing v/v

???????

100. why weir is provided in remote water level indicator

Steam is always there in the steam side

water is always there in the steam side

water is always there in the water side ok

Steam is always there in the water side

101. Why phosphate is used in boiler?

To reduce chloride

To reduce alkalinity ok

To precipitate sludge

102. If water level increases in h/e what happens?

Temperature fluctuates and causes corrosion

Increases the pressure of steam ok

None

2 What effects will waterlogging cause in some heat exchangers?

a) None at all

b) It increases the steam pressure in the heat exchanger

c) It can cause swings in the temperature of the heated fluid and corrode the heat

exchanger?

d) It increases the thermal performance

103. Balancing of turbo feed p/p rotating part means?

a) static balancing of rotor

b) dynamic balancing of rotor ok

c) hydraulic balancing the pump end

d) all the above

104. Manoevring vacuum low

a) to have more steam

b) control relative expansion in ahead turbine

c) control relative expansion in astern turbine ok

d) to allow less steam to circulate within turbine

105. Hydrazine can be added in low pressure boiler

True

False

106. Formula of Hydrazine

N2H4

Ques 107 During maintenance what happens to the valve lid edge MANDATORY QUESTION

Its lapped and grinded by carbonised plate

Only grinded

Not removed/ fixed on valve seat

When it is assembled valve lid is put first

Ques 108 Steam trap if exit is restricted what will happen?

Differential pressure will increase

Temp increase

Temp of condensate released reduces

Capacity reduces (depending upon options available, mark C or D)

6 What is the effect of increasing backpressure on a bimetallic trap?

a) It reduces the temperature of the condensate released by the trap

b) It allows the trap to be used on a higher steam pressure

c) It increases the differential pressure across the trap

d) The trap must be the same size as the condensate drain line

4 What is the effect of higher backpressure on a steam trap?

a) None whatsoever

b) It reduces the steam pressure in the heat exchanger

c) It reduces the capacity of a steam trap

d) It increases the differential pressure across the steam trap

Ques109 Steam trap fails to operate in open position , what happen to the equipment before it?

Efficiency increases

Efficiency decreases

The steam trap is lost

The Equipment does not work

What effect does a steam trap have when failed in the open position?

a) It will stop the plant from operating

b) It will loose steam and cost money

c) Plant efficiency is maintained

d) Plant efficiency is increased

Ques 110 what type of steam trap used on board?

Thermodynamic type ok

Ques 111 Motive fluid for air ejector in condenser?

Lp steam doubt

Ques 112 when the feed pump is not supplying water to the boiler then,

It stops

It churns in the casing ok

It recirculates

Ques 113 before taking watch from another watchkeeper you notice that the gauge glass is empty

for the boiler, what do you do?

Blow down the boiler

Increase the feed flow to the boiler ok

Inform the watchkeeper

Secure the fire

Ques 114 Condensate heating from the cargo tanks goes to the

observation tank

Ques 115 Reaction turbine has both fixed and free moving nozzles?

True ok

false

Ques 116 Outer gland pocket in steam turbine what it is used for? MANDATORY

Supply

Exhaust of excess steam

Leak off of Gland (reeds pg-178, GJ Roy Pg-48, Taylor pg-60 ---all except Roy say that

steam leaks from one pocket of gland to the other. In the end we are left with leak off.)

Supply and exhaust

There are two pockets in the glands fitted to all the ends of the turbine; the inner pocket is connected to the gland steam supply and the outer to the exhaust line . The

HP turbine has to further inner pockets due to it having to deal with steam at higher

pressures and hence increased leakage. The innermost pocket simply passes leakage

steam back to the casing a few stages downstream, the next pocket passes the leakage

steam to the HP turbine exhaust.

When the engine is stopped the gland steam make-up supplies the system requirements. When the engine is in use the flow of steam to the supply pocket of the

inlet end to the HP end reverses and the gland starts to supply the system reducing the

quantity the make-up has to provide. At full power the only gland requiring steam will

be the exhaust end of the LP turbine, the other will be either supplying the system or

supplying themselves sufficiently to not require steam from the system.In this

condition the make-up would be shut and the pressure regulated by the dump opening.

Ques 117 In normal running condition HP gland steam is not sufficient for LP gland. Do we need

external steam?

True

false

Ques 118 what type of turbine is HP turbine?

Impulse reaction

Reaction

Impulse ok

Rateau

Ques 119 How is the speed of turbo alternator governed?

By governing the main steam valve

By governing the aux steam valve

By governor controlling the set of nozzle ok

Something about set of nozzles

Ques 120 why is steam drain from fuel oil heating lead to filter tank? (MTOA) MANDATORY

QUESTION

a) Trap the oil

b) Filter oil and insoluble impurity ok

c) To watch if any oil coming with the condensate

d) To cool the condensate in the condenser

Ques 121 Excess steam from hp gland cannot be supplied to the LP gland during normal running of

the vessel? MANDATORY QUESTION

True ok

False

Q 122 LP Turbine is purely impulse turbine?

True ok

False

Q 123 What type of turbine is feed pump?

Impulse ok

Impulse reaction

Q 124 Material of air heater for low temp. Corrosion? MANDATORY QUESTION

CI Grills

MS fins

Glass or Enamel coating ok

Electroplating of tin

Q 125 Low vacuum during warming up period so that steam flows slowly

True

False ok

Q 126 What happens when bearing runs out of turbine?

Severly damaged

Flow of steam automatically stops

Layers of white metal comes out (Reeds pg-142, Taylor pg-65.bearing damaged and being soft comes out.. contact of rotor with bronze sleeve and this alerts operator but no excessive vibration caused as offset due

to bearing clearance already accounted for during axial alignment of rotor )

Q 127 Markings on steam safety vv

Set pressure

Relieving pressure

Capacity/flow rate

Std. no.

Q 128 How does feed water control system regulate the feed inlet and compensate for large

fluctuations of shrink n swell MANDATORY QUESTION

feed fwd ok

feed back

feed fwd and feed back

cannot be compensated

Q 129 Advantage of Rotary cup burner MANDATORY

High tdr

Less maintenance

Cheaper

Less complex

Q 130 Hydrazine can be used in all boilers

True ok

False

Q 131 How is the content of chloride tested in boiler . MANDATORY QUESTION

Titration by H2SO4

Titration by silver nitrate ok

By adding drops of silver nitrate

Q 132 If HP Turbine breaks then what arrangement kept on continuing to reach the port?

Desuperheated steam sent to the l.p turbine, flexible coupling removed ok

Nozzle attached to flange on LP And steam supplied to it.

Q 133 During overhaul of high lift safety valve how is the spindle attached to valve lid

Rigidly so as to allow no movement. ok

By a pin so that there is some movement between them. Found in safety valve survey(Loose pin is provided to secure valve lid and allow thermal expansion.)

Q 134 Why boiler gauge glass is used in pair ? (MTOA)

a) Legal requirement

b) To compare readings of the two

c) One show different viewing angle from other./ gauge glass cover d different area

d) Only one is used at a time

Q 135 What is inner pocket of gland used for MANDATORY

Exhaust

Makeup

Makeup and Exhaust of excess steam

Leak off of steam

Q 136 During sea runnin g conditions, direct contact type feed heater normally receives steam from

(MTOA)

a) Feed pump exhaust ok

b) PRV

c) Bleed steam

d) Something ?????

Q 137 why gauge glass blown peroidcaly?

a)to check level

b)visible range ok

c)1 is standyby

d)to clear cocks.

Q 138 To prevent stm leak and air leak from/to turbines,they r sealed packed.

a)true ok

b)false.

Q 139 bleed stm used for-

a)heat fo

b)heat feed water

c)stm to stm generator

d)use in evaporating plant for heating.

Q 140 Hardest salt

MgSO4

CaSO4

CaCO3

Q 141 Direct Contact Feed Water comes in direct contact with

1 Chemicals

2 Steam

3 air

4 O2

Q 142 Vac condensor P low

1 condenstae level increases

2 air ejector not working

3 air leak

4 cooling water througput decrease

Q 143 how is condensor Pressure kept low

1 By throttling

2 allowing air via valve from valve connected onto the shell

3 cooling water output

4 via glands on turbine

Q 144 what if steam trap fails open

1. its expensive and steam lost ok 2. eff decreases 3. eff increases

Q 145 Function of outer pocket

a exhaust of excess steam

b supply and exhaust

c supply

Q 146 Function of inner pocket

a exhaust of excess steam

b supply and exhaust of excess steam

c supply

Open feed system

In the feed water tank we cool deed water reducing the vapour loss

Feed water tank is used for heating feed water

Q 147 shrink and swell compensation

feed back only

feed fwd

feed back control with feed fwd signal

Q 148 feed pump turbine type

impulse

curtis

velcoity compounded

impulse reaction

Q 149 How blades are secured

It will not come out by centrifugal force

They dont touch each other

It will not come out by centrifugal force

All of the above

Q150 Something related to scum blowdown (wording is quite clear)

Q 151 Turbine heating should be in what drn

Uniform

Fwd

Aft

Q 152 If LO pump of turbine fails then what happens

Maneuvering vv closes instantly and alarm is actuated

Maneuvering vv closes gradually after alarm is actuated

Q 153 How is lp steam obtained onboard MTOA

Using a steam to steam generator

Bleed steam

Lp boiler

PRV

Q154 Speed of feed pump always remains constant

True

Flase

Q155 Enthalpy of ecaporation of water

540 Kcal/Kg

2 Which of the following is the most reliable steam trap tester?

a) A sight glass

b) An ultrasonic listening device

c) A temperature monitoring device

d) An integrated steam trap sensor or separate chamber

3 What are the operating principles of an integrated trap sensing system?

a) Ultrasound detection

b) Conductivity and temperature for leaks and blockages respectively

c) Temperature sensing only

d) Pressure sensing

4 Why is it not feasible to rely on temperature sensing for testing steam leaks?

a) Because it is too difficult

b) Temperature sensing devices cost too much

c) Because steam and condensate can co-exist at the same temperature

d) Because saturation temperature varies with steam pressure

5 What are the most convenient steam trap connections to consider for maintenance

purposes?

a) Screwed connections

b) Flanged connections

c) Socket weld connections

d) Universal swivel connections

6 Which of the following statements is true?

a) Ultrasonic trap testers cannot differentiate live steam and flash steam

b) A Spiratec hand held unit cannot indicate a failed closed steam trap

c) Sight glasses cannot differentiate between live steam and flash steam

d) All of the above