3301. Which of the following solid fuel has high caloric value : ___________?
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A. Peat

B. Bituminous coal

C. Wood

D. Anthracite coal
3302. All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________?
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A. One

B. Four

C. Two

D. Half

3303. The efficiency of the ideal diesel cycle is ________ than that of Otto cycle, for the same compression ratio
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A. None of these

B. Equal

C. Lower

D. Higher

3304. Which of the following solid fuel has high carbon content?
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A. Peat

B. Coke

C. None of these

D. Coal

3305. The average calorific value of wood is about : __________?
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A. 25000 kj/kg

B. 33500 kj/kg

C. 23000 kj/kg

D. 19700 kj/kg
3306. The part load efficiency of a carburettor is,___________________?
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A. Constant

B. Maximum

C. Poor

D. Optimum

3307. Scavenging air is supplied to a two-stroke engine at a density greater than that of atmosphere. This means the engine is__________________?
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A. Not supercharged

B. Charged

C. Supercharged

D. Supercharged provided its speed is low

3308. In turbulence chamber in diesel engine__________________?
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A. the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect of fuel mixture

B. only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge

C. there are no valves

D. fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat

E. fuel is partly burnt by spark

3309. Deposition of carbon in petrol engine cylinder would result in increase of__________________?
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A. compression ratio

B. swept volume

C. volumetric efficiency

D. clearance volume

E. mean effective pressure

3310. Which of the following is mostly used used as blast furnace fuel for extracting pig iron from iron ores?
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A. Brown coal

B. Hard coke

C. Woodchar coal

D. Anthracite coal

3311. In the case of petrol engine at maximum output, the percentage of CO in exhaust gases is ____________________?
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A. 5-10%

B. Considerable percent

C. Depends on load and quality of fuel

D. Zero

3312. A two stroke engine is usually identified by__________________?
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A. absence of valves

B. size of flywheel

C. location of fuel tank

D. type of lubrication system

E. weight of engine

3313. The basic requirement of a good combustion chamber is___________________?
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A. minimum turbulence

B. low compression ratio

C. high power output and high thermal efficiency

D. high compression ratio

E. low volumetric efficiency

3314. A two stroke crank compressed engine has following ports in the cylinder_______________?
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A. transfer port and exhaust port

B. suction port and transfer port

C. suction port, exhaust port and transfer port

D. transfer port only

E. suction port and exhaust port

3315. For water, at pressures below atmospheric___________________?
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A. melting point drops slightly and boiling point drops slightly

B. melting point rises slightly and boiling point drops markedly

C. melting point rises markedly and boiling point drops markedly

D. melting point drops slightly and boiling point drops markedly

E. none of the above

3316. The function of injector used in small steam plants is to________________?
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A. control steam temperature by injecting water

B. dose chemicals in feed water

C. create vacuum in furnace

D. create vacuum at turbine exhaust

E. pump feed water
3317. The diameter of fire tube of Cornish boiler compared to its shell is__________________?
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A. three-fifth

B. one-fifth

C. two-fifth

D. one third

E. one half
3318. Hard coke is produced by carborisation of coal at_______________?
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A. 120O-1500C

B. 70O-850C

C. 95O-1100C

D. atmospheric temperature

E. 500-600C

3319. Which of the following is a water tube boiler_________________?
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A. Cochran boiler

B. locomotive boiler

C. Lancashire boiler

D. Cornish boiler

E. Babcock and Wilcox boiler
3320. Hard coke is used in________________?
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A. cement industry

B. locomotives

C. blast furnace

D. thermal power plant

E. domestic use

3321. Lancashire boiler is a__________________?
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A. water tube boiler with natural/forced circulation

B. none of the above

C. stationary fire tube boiler

D. mobile fire tube boiler

E. stationary water tube boiler

3322. On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by_______________?
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A. curved line

B. vertical straight line

C. none of the above

D. straight inclined line

E. horizontal straight line
3323. Latent heat of dry steam at atmospneric pressure is equal to____________________?
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A. 100 kcal/kg

B. 427 kcal/kg

C. 539 BTU/lb

D. 471 kcal/kg

E. 539 kcal/kg
3324. In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?
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A. 40%

B. 50%

C. 80%

D. 90%

E. 25%

3325. Heating wet steam at constant temperature is heating it at constant_________________?
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A. enthalpy

B. pressure

C. none of the above

D. entropy

E. volume

3326. At very low temperature, the melting and boiling temperatures become equal. This temperature is____________________?
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A. 0K.

B. 300K

C. 373K

D. 273.16K

E. 303K

3327. 100% efficiency of a thermal cycle cannot be achieved because of __________________?
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A. non-availability of ideal substance

B. frictional losses

C. it is not possible to achieve 0K temperature

D. leakage

E. none of the above

3328. The saturation temperature of steam with increase in pressure increases____________________?
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A. linearly

B. inversely

C. slowly first and then rapidly

D. rapidly first and then slowly

E. none of the above

3329. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are________________?
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A. none of the above

B. supplied by same manufacturer loose and assembled at site

C. packaged boiler does not exist

D. supplied mounted on a single base

E. purchased from several parties and packed together at site

3330. The specific volume of steam with increase in pressure decreases_____________________?
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A. slowly first and then rapidly

B. linearly

C. none of the above

D. rapidly first and then slowly

E. inversely

3331. Which of the following gases has the highest calorific value ________________?
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A. producer gas

B. coal gas

C. blast furnace gas

D. coke oven gas

E. water gas

3332. The water tubes in a babcock and wilcox boiler are__________________?
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A. vertical

B. horizontal

C. horizontal and inclined

D. inclined

E. vertical and inclined

3333. The shell diameter and length of locomotive boiler are_______________?
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A. 1.5 m, 8 m

B. 1.5 m, 4 m

C. 2 m, 4 m

D. 1 m, 4 m

E. 1.5 m, 6 m

3334. Which of the following varieties of coals is mostly used in steam boilers____________________?
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A. peat

B. non-coking bituminous coal

C. none of the above

D. brown coal

E. coking bituminous coal

3335. The biggest size of thermal power unit operating in India is ________________?
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A. 60 MW

B. 100 MW

C. 500 MW

D. 210 MW

E. 30 MW

3336. The fire tubes in, a Coarran and Scotish marine boiler are_________________?
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A. horizontal

B. vertical

C. inclined

D. both horizontal and vertical

E. horizontal and inclined

3337. Efficiency of a thermal cycle increases by ________________?
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A. regeneration

B. reheating of steam

C. both A. and B.

D. cooling of steam

E. none of the above

3338. The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is___________________?
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A. same

B. could be more or less depending on other factors

C. none of the above

D. more

E. less

3339. Which of the following is steam dbal?
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A. non-coking bituminous coal

B. pulverised coal

C. none of the above

D. coking bituminous coal

E. brown coal

3340. The specific heat of superheated steam in kcal/kg is generally of the order of___________________?
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A. 0.1

B. 0.5

C. 1

D. 0.8

E. 0.3

3341. Superheating of steam is done at_________________?
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A. constant pressure

B. constant entropy

C. constant enthaply

D. constant volume

E. constant temperature

3342. Mechanical equivalent of heat for 1 kcal or Joules equivalent is equal to_________________?
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A. 102 kgm

B. 75 kgm

C. 539 kgm

D. 421 kgm

E. 421 kgm
3343. The diameters of fire tubes and superheaer tubes in locomotive boiler are_________________?
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A. 32.5 mm, 180 mm

B. 65.5 mm, 210 mm

C. 47.5 mm, 130 mm

D. 24.5 mm, 65 mm

3344. During polytropic process_________________?
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A. steam may be wet, dry or superheated after expansion

B. work is done

C. none of the above

D. all of the above

E. heat transfer takes place across cylinder walls

3345. The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become_______________?
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A. remain dry saturated

B. wet

C. none of the above

D. superheated

E. dry

3346. Water boils when its vapour pressure ___________________?
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A. equals 760 mm of mercury

B. equals to atmospheric pressure

C. equals that of the surroundings

D. boiling has ^nothing to do with vapour pressure

E. equals the pressure of water in the container

3347. A boiler in India should conform to safety regulations of__________________?
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A. BS

B. DIN

C. GOST

D. IBR

E. ASTM

3348. In a throttling process_________________?
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A. internal energy of steam changes

B. all of the above

C. none of the above

D. work is done by the expanding steam

E. heat transfer takes place

3349. Carbonation of coal is the process of________________________?
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A. heating wood in a limited supply of air at temperatures below 300C

B. binding the pulverised coal into brick-ettes

C. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel

D. enriching carbon in the coal

E. pulverising coal in inert atmosphere

3350. Pick up the correct statement as regards Cornish boiler and Lancashire boiler _______________?
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A. cornish is fire tube and lancashire is water tube

B. cornish is water tube and lancashire is fire tube

C. cornish has two fire tubes and lancashire has one

D. lancashire has two fire tubes and cornish has one

E. both have two fire tubes