1951. Select the correct statement?
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A. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level

B. Gauge piessure is equal to atmospheric pressure plus instrument reading

C. Local atmospheric pressure depends upon elevation of locality only

D. Local atmospheric pressure is always below standard atmospheric pressure

E. A barometer reads the difference be-tween local and standard atmospheric pressure

1952. 100% efficiency of a thermal cycle cannot be achieved because of __________________?
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A. none of the above

B. non-availability of ideal substance

C. it is not possible to achieve 0K temperature

D. frictional losses

E. leakage

1954. A fusible plug is fitted in small boilers in order to ___________________?
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A. control steam dome

B. remove molten aslj

C. avoid excessive build up of pressure

D. extinguish fire if water level in the boiler falls below alarming limit

E. avoid explosion

1956. The property of a fluid which enables it to resist tensile stress is known as___________________?
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A. viscosity

B. compressibility

C. adhesion

D. cohesion

E. surface tension

1957. Center of pressure on an inclined plane is___________________?
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A. below the centroid

B. at the centroid

C. at center of pressure

D. at metacentre

E. above the centroid

1958. Pulverized fuel is used for___________________?
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A. medium sized units

B. less radiation loss

C. better burning

D. stoker fired boilers

E. more calorific value

1959. Heating of dry steam above saturation temperature is known as_____________________?
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A. supersaturation

B. enthalpy

C. super tempering

D. superheating

E. latent heat

1960. The relative heat absorption for successively added equal areas of boiler convection heating surfaces____________________?
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A. first decreases and then increases

B. first increases and then decreases

C. decreases

D. increases

E. remains unaffected

1962. Property of a fluid by which its own molecules are attracted is called___________________?
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A. viscosity

B. surface tension

C. cohesion

D. compressibility

E. adhesion

1963. The specific weight of water is 1000 kg/m_________________?
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A. at mean sea level

B. all the above

C. at normal pressure of 760 mm

D. at 4C temperature

E. none of the above

1964. Which of the following is steam dbal?
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A. brown coal

B. pulverised coal

C. none of the above

D. coking bituminous coal

E. non-coking bituminous coal
1967. A streamline is defined as the line________________?
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A. parallel to outer surface of pipe

B. parallel to central axis flow

C. along which the pressure drop is uniform

D. which occurs in all flows

E. of equal yelocity in a flow
1970. Steam exhaust from high pressure turbine is reheated in _____________________?
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A. boiler drum

B. superheater tubes

C. a separate coil located in convection path

D. a separate coil

E. economiser

1971. Center of pressure compared to e.g. is___________________?
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A. at same point

B. none of the above

C. above or below depending on area of body

D. below it

E. above it

1972. Newtons law of viscosity is a relationship between____________________?
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A. shear stress, velocity and viscosity

B. shear stress and viscosity

C. shear stress, pressure and rate of angular distortion

D. pressure, velocity and viscosity

E. shear stress anctthejiate of angular distortion
1973. Superheating of steam is done at_________________?
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A. constant volume

B. constant pressure

C. constant entropy

D. constant temperature

E. constant enthaply

1974. Secondary air is the used to_________________?
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A. air fed to pulverisers

B. air delivered by induced draft fan

C. transport and dry the coal

D. convert CO (formed in lower zone of furnace) into C02 at higher zone

E. provide air around burners for obtaining optimum combustion
1975. The high pressure boiler is oiie producing steam at a pressure more than_________________?
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A. 5 kg/cm2

B. 75-80 kg/cm2

C. 40 kg/cm2

D. atmospheric pressure

E. 10 kg/cm2

1976. Pressure of the order of 10? torr can be measured by__________________?
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A. McLeod gauge

B. micro-manometer

C. ionisastion gauge

D. Bourdon tube

E. Pirani Gauge

1977. In a throttling process_________________?
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A. all of the above

B. internal energy of steam changes

C. work is done by the expanding steam

D. heat transfer takes place

E. none of the above
1980. For combustion of a fuel, following is essential_____________________?
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A. all the three above

B. 02 to support combustion

C. none of the above

D. proper ignition temperature

E. correct fuel air ratio

1981. Choose the wrong statement ?
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A. For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy

B. The center of buoyancy is located at the center of gravity of the displaced liquid

C. All floating bodies are stable

D. For stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy

E. If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions

1982. For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal____________________?
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A. all the four ratios of inertial force to force due to viscosity, gravitation, sur-face tension, and elasticity

B. ratio of inertial force to force due to gravitation

C. ratio of inertial force to force due to surface tension

D. ratio of inertial force to force due to viscosity

1984. The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm. The pressure at 2.5 m below the oil surface will be __________________?
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A. 3 metres of water column

B. 3.5 metres of water column

C. 2 metres of water column

D. none of the above

E. 4 m of water column

1985. Orsat meter is used for__________________?
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A. volumetric analysis of the flue gases

B. mass flow of the flue gases

C. none of the above

D. gravimetric analysis of the flue gases

E. measuring smoke density of flue gases

1986. Lancashire boiler is of____________________?
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A. natural cirulation type

B. internally fired type

C. stationary<fire tube-type

D. horizontal type

E. all of the above
1987. Hygrometery deals with the_________________?
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A. density measurement

B. pressure of air

C. Hygroscopic substances

D. temperature of air

E. water vapour in air
1989. A supercritical boiler is one that operates above the pressure and temperature of following values_____________________?
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A. 218 kg/cm2 abs and 540C

B. 1 kg/cm2 and 100C

C. 100 kg/cm2 abs and 373C

D. 100 kg/cm2 and 540C

E. 218 kg/cm2 abs and 373C
1990. The latent heat of steam with increase of pressure__________________?
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A. none of the above

B. decreases

C. increases

D. remains same

E. behaves unpredictably

1991. Cochran boiler is a__________________?
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A. forced circulating boiler

B. veritcal water-tube boiler

C. horizontal fire-tube boiler

D. horizontal water-tube boiler

E. vertical fire tube boiler
1992. Coke is produced by__________________?
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A. enriching carbon in the coal

B. binding the pulverised coal into brick-etts

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

D. pulverising coal in inert atmosphere

E. heating wood in a limited supply of air at temperatures below 300GC

1993. 1 kg.m is equal to_________________?
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A. 539 Joules

B. All Joules

C. 102 Joules

D. 9.81 Joules

E. 427 Joules

1994. The speed of sound in a ideal gas varies directly as its__________________?
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A. pressure

B. absolute temperature

C. temperature

D. density

E. modulus of elasticity

1995. Cavitation will begin when__________________?
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A. pressure is increased

B. pressure becomes more than critical pressure

C. flow is increased

D. none of the above

E. the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
1996. Equivalent evaporation of water is the evaporation for a feed water supply at 100C__________________?
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A. and its corresponding conversion into dry saturated steam at 100C and 1.033 kg/cm2

B. and its corresponding conversion into dry steam at desired boiler pressure

C. conversion into steam at the same pres-sure at which feed water is supplied

D. conversion into steam at atmospheric condition

E. none of the above

1997. Choose the wrong statement?
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A. Viscosity of liquids is appreciably affected by change in pressure

B. Viscosity of liquids decreases with in-crease in temperature

C. Viscosity is due primarily to interaction between fluid molecules

D. Viscosity is expressed as poise, stoke, or saybolt seconds

E. Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force

1998. Principle of similitude forms the basis of_________________?
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A. hydraulic designs

B. comparing similarity between design and actual equipment

C. designing models so that the result can be converted to prototypes

D. comparing two identical equipments

E. performing acceptance tests

1999. The property of fluid by virtue of which it offers resistance to shear is called________________?
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A. adhesion

B. viscosity

C. cohesion

D. all of the above

E. surface tension

2000. The shell diameter and length of locomotive boiler are_______________?
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A. 1 m, 4 m

B. 1.5 m, 8 m

C. 2 m, 4 m

D. 1.5 m, 6 m

E. 1.5 m, 4 m