U1.What will you do while Soot Blowing? MANDATORY Raise the boiler firing rate Lower the boiler firing rate ok Do nothing2. 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 rows3. 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 manoeuvring , 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 output5. During maneuvering , Y is condenser vacuum kept low? To Prevent distortion of rotor ok6.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 readilyIt 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 easy air and non condensable gases removal High Efficiency Ease of Flow9.If steam pressure is reduced at inlet of heat exchanger then- MANDATORY QUESTION Steam temp increasesok 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. Low3 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) ( MULTIPULE) 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 input15.In BCC system which has feedback from steam pressure, feed forward is provided from Dump steam Condensate temp ok Steam flow rate16.In single element feed control system if value of steam flow increases, then feed water flow MANDATORY Increasesok No change Decreases 17.Shrink and swell compensation? feed fwd feed backok feed fwd and feed back cannot be compensated18. Preheating of turbine is done by Gland steam condenser Aux stop valve Main ahead stop valve19.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 shockdoubt 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 net22.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 samegot on net23.How many pockets in labyrinth seal of HP and LP Turbine MANDATORY QUESTION 0 2 3 424.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 B25.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 level26.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 corrosion27.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, attemperator28.Why is air heater in uptakes more prone to fire (MCQmore than one) MANDATORY More oxygen High temperature Soot deposit Proximity to furnace29.Economizer tube material? CI gill section ok Mild Steel/Low Carbon steel30.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 stageok At 4th stage before entry to boiler31.Position of Deaerator at top? MANDATORY QUESTION To provide NPSH required EFFICIENT USE OFF MACHINERY SPACE/ SO AS TO AVOID AIR POCKETS STEAM BEING LIGTER FLOWS EASILY TO TOP TO REMOVE AIR EASILY FROM TOP WITHOUT PASSING THROUGH MACHINERY SPACE32.How is air removed from condenser? (MCQmore than one) by cooling down the steam by using steam in the air ejector 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 flow34.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 air35.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 (mandatory) (MCQmore than one) 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 open37.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 assembly38.What type of reduction gear used in turbine? MANDATORY double helical and double reduction Single helicalok39.What type of reduction used in turbine? Helicalok40. Flexible coupling in turbine is installed between turbine and pinionok41. 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 fireok42.Purpose of economizer? To increase Main propulsion plant efficiencyok 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 decreases44.What cant be used as IG on LNG Ships? IG from boilerok Pure Nitrogen from shore45.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 turbineok There is a possibility of water hammering TO REMOVE ANY DIRT IN LINE

46.Where is steam drain from FO tanks lead to Observation tankok47.Steam line is drained to Prevent water hammerok Remove dirt in line48. ESRD Boiler(ESD type with reheat) , reheated tube is protected by.gas damper (fill in the blanks) MANDATORYDuring long periods of steaming without the need for reheat, i.e. when running astern or during port stay, the reheater tube is protected by cooling air from FD fan. Closing of the reheat dampers automatically opens cooling dampers to admit air above the reheater.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 air51. 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 stablity52.Chloride test-what all is added and what is the color? N/35 of silver nitrate;reddish brown53.Why is hydrazine handled properly? Toxic n carcinogenicok54.What will happen if hydrazine is added to Low Pressure bOiler? Reduces oxygen Breaks down to ammonia Copper Nitrate55.What is done in high pressure boiler to remove oxygen? MANDATORY Hydrazine addedok Sodium sulphite added Feed water taken to boiling point in feed heater All of the above56. In N/50 H2SO4, strength of conc is MANDATORY QUESTION 1/50 of normality 50 times normalityok 50% of normality None of above57.What does N mean in N/50? Normalityok58.Purpose of blowdown valve? (MCQmore than one........ not sure about this) To remove deposits To empty the boiler ok Legal requiremen Fill up the Boiler59.Blowdown sequence Open ship side then boiler sideok Open boiler side then ship side60.HP turbine is entirely impulse-reaction type MANDATORY QUESTION Trueok False61.Steam Bleeding from HP Turbine increases the turbine speed MANDATORY QUESTION True False62.Manoeuvring can be done for more than 2hrs continuously True False63.Does bleeding steam improve efficiency of plant Yes No64.In Reaction turbine, Pr. Drop takes place in the nozzle and in the blades True False 65.Are all the sodium salts soluble? Yes No66. HP Turbine gland is not sufficient for LP turbine gland pocket in low load condition? True False67.What is open feed system? Where u allow air to enter Where u dont preheat the water68.What is closed feed system? Where u dont allow the air to enter ok Where u preheat the water69.Meaning of cross compounding? Mandatory question HP n LP connection using a crossover pipe ok70.Purpose of attemperator and desuperheater?Attemperator- maintains the superheat; desuperheater- reduces the temp of superheated steam71.Disadvantage of regenerative and recuperative air preheater? Heavy and occupies more space Less efficiency Easily corroded Leak through air seal 72.Flow of cooling water through condenser? Axial OK radial73.Why is steam passed through a strainer before passing PRV? MTOA MANDATORY (MULTIPLE) 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 valve74. 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 peripheryok Abt 180 deg of peripehery Abt 270 deg of peripehery75. Gland steam in LP Turbine is required so that No air leaks in turbine NO steam leaks out of turbine Both None76. Air is preheated in (MCQ- more than one) MANDATORY QUESTION Economizer Air heater OK Boiler Casing Air register77. Joint material between turbine is Chart paper Reinforced heat and pressure resistant Metal to metal contact Reinforced heat resistant None78. Gauge glass is blown through for (MTOA) To ensure cocks are clear ok Correct level is shown To Ensure water level is above heating surface79. 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 Tri sodium phosphate and Di sodium hydrogen phosphate with the Na/PO4 mole ratio of 2.8 added directly to boiler. Hydrazine for removing oxygen from feed water is added to the feed water.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 clear81. Low Pressure steam is obtained from (MCQ--- more than one) Steam reducing vv Low pressure boiler Steam to steam generator prv ok82. 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 time83. 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 water84. 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 Pipeline is meant for higher pressure Due to distribution5 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 these87. 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 steamok It doesnt condense readily in steam pipeline It doesnt condense till it reaches the condenser88. Steam turbine plant efficiency is increased by Bleeding steam in stages from turbine ok89.Protecting material on Economizer tubes is CI gills ok90. 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 signal92. NaOH reacts with : MANDATORY QUESTION MgCl2 CaSO4 NaClok Na2SO493. 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 ok 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 okc) hydraulic balancing the pump end d) all the above

104. Manoevring vacuum low a) to have more steam bbb) control relative expansion in ahead turbine c) control relative expansion in astern turbine okd) 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 firstQues 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 typeokQues 111 Motive fluid for air ejector in condenser?Lp steam doubtHP Steam super heated steam used to avoid erosion of ejector nozzle.Ques 112 when the feed pump is not supplying water to the boiler then, It stops It churns in the casingok It recirculatesQues 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 boilerok 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 Gland 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 RateauQues 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 nozzlesQues 120 why is steam drain from fuel oil heating lead to filter tank? (MTOA) MANDATORY QUESTIONa) Trap the oilb) Filter oil and insoluble impurity okc) To watch if any oil coming with the condensated) 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 FalseQ 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 okQ 126 What happens when bearing runs out of turbine? Severly damaged Flow of steam automatically stops Layers of white metal comes out 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 rotorQ 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 compensatedQ 129 Advantage of Rotary cup burner MANDATORY High tdr Less maintenance Cheaper Less complexQ 130 Hydrazine can be used in all boilers Trueok FalseQ 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 nitrateQ 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 requirementb) To compare readings of the twoc) One show different viewing angle from other. gauge glass cover d different aread) Only one is used at a time

Q 135 What is inner pocket of gland used for Exhaust Makeupok Both ??????Q 136 During sea runnin g conditions, direct contact type feed heater normally receives steam from (MTOA)a) Feed pump exhaustokb) PRVc) Bleed steamd) Something ?????Q 137 Why gauge glass blown peroidcaly? a)to check level b)visible rangeok 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)trueok 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 CaCO3Q 141 Direct Contact Feed Water comes in direct contact with 1 Chemicals 2 Steam 3 air 4 O2Q 142 Vac condensor P low 1 condenstae level increases 2 air ejector not working 3 air leak 4 cooling water througput decreaseQ 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 open1. its expensive and steam lost ok2. eff decreases3. eff increases Q 145 Function of outer pocket a exhaust of excess steam b supply and exhaust c supplyQ 146 Function of inner pocketa exhaust of excess steamb supply and exhaustc supplyOpen feed systemIn the feed water tank we cool deed water reducing the vapour lossFeed water tank is used for heating feed waterQ 147 shrink and swell compensation

feed back onlyfeed fwdfeed back control with feed fwd signal

Q 148 feed pump turbine typeimpulsecurtisvelcoity compoundedimpulse reaction

Q 149 How blades are secured (neither question nor options are clear) It will not come out by centrifugal force They dont touch each other rotational force All of the above Q150 HOW WILL YOU ENSURE THAT SCUM IS DIRECT OUT OF BOILER a.TAKE THE LEVEL OF WATER ABOVE THE SCUM PAN b.SCUM PAN FLOATS ON WATER c.SOME AMOUNT OF LOSS OF WATER IS INAVOITABLE d..FLOW OF SCUMB THROUGH GAUGE GLASSQ 151 Turbine heating should be in what drn Uniform Fwd AftQ 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 PRVQ154 Speed of feed pump always remains constant True FlaseQ155 Enthalpy of ecaporation of water 540 Kcal/Kg

Top of Form2 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

Q156. WHILE REVERSING THE TURBINE THE MESHING TEETHS OF GEAR FACE GETS CHANGEDa.TRUE b.FALSEBottom of Form

Q157.LP TURBINE IS ENTIRELY IMPULSE-REACTIONa.TRUEb.FALSE

Q158. HOW TO DETERMINE STEAM PLANT EFFICIENCY1 FUEL BURNT IN BOILER TO SHAFT POWER OF TURBINE2.HEAT INPUT TO POWER DEVELOPED3. HEAT INPUT TO SPPED OF SHIP4. STEAM PRODUCED TO STEAM ABSORBED