1901. Efficiency of rankine cycle can be increased by_________________?
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A. decreasing exhaust pressure

B. increasing number of regenerative heaters

C. decreasing initial steam pressure and temperature

D. increasing exhaust pressure

E. increasing the expansion ratio

1902. Which of the following is a fire tube boiler________________?
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A. Stirling boiler.

B. Babcock and Wilcox boiler

C. none of the above

D. all of the above

E. locomotive boiler
1903. Choose the wrong statement ?
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A. Relative density of liquids can be determined by means of the depth of flotation of hydrometer

B. The point through which buoyant force acts, is called the center of buoyancy

C. any weight, floating or immersed in a liquid, is acted upon by a buoyant force

D. Center of buoyancy is located above the center of gravity of the displaced liquid v

E. Buoyant force is equal to the weight of the liquid displaced

1904. Which of the following coals has the highest calorific value_________________?
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A. anthracite coal

B. bituminous coal

C. peat

D. lignite

E. wood

1905. Surface energy per unit area of a surface is numerically equal to _____________________?
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A. force of cohesion

B. atmospheric pressure

C. surface tension

D. viscosity

E. force of adhesion

1906. The process of diffusion of one liquid into the other through a semi-permeable membrane is called_______________________?
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A. diffusivity

B. cohesion

C. viscosity

D. surface tension

E. osmosis
1907. A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to_________________?
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A. 1000 kg

B. 1 kg

C. 100 kg

D. 10,000 kg

E. 10 kg
1908. Which of the following boilers is best suited to meet fluctuating demands___________________?
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A. babcock and wilcox

B. cochran

C. lancashire

D. comish

E. locomotive
1909. Locomotive boiler is of the following type__________________?
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A. internally fired

B. multitubular

C. all of the above

D. mobile

E. horizontal

1910. The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to_________________?
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A. 21,000

B. 2700

C. 1000

D. 2100

E. 10,000

1911. Hydrometer is used to determine____________________?
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A. relative humidity

B. specific gravity of gases

C. specific gravity of liquids

D. density

E. specific gravity of solids

1912. The coal requirement per kW hour generation in the thermal power plant is of the order of__________________?
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A. 1.0 to 1.5 kg

B. 0.2 to 0.4 kg

C. 0.1 to 0.2 kg

D. 0.6 to 0.8 kg

E. 1.5 to 2 kg

1913. Incomplete combustion can be best judged by__________________?
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A. excess air in flue gases

B. measuring oxygen in flue gases

C. smoky chimney exit

D. measuring carbon mono-oxide in flue gases

E. measuring temperature of flue gases at exit of furnace

1914. An ideal regenerative cycle is ______________________?
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A. more than carnot cycle

B. none of the above

C. equal to carnot cycle

D. less than carnot cycle

E. could be anything

1915. Tertiary air is the air used to____________________?
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A. cool the scanners

B. provide air around burners for obtaining optimum combustion

C. supply air for ignitors

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

E. transport and dry the coal

1916. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if___________________?
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A. all of the above

B. the area is horizontal

C. none of the above

D. the area is vertical

E. the area is inclined

1917. Viscosity of water in comparison to mercury is_________________?
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A. higher

B. lower

C. higher/lower depending on temperature

D. unpredictable

E. same

1918. A boiler in India should conform to safety regulations of__________________?
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A. GOST

B. ASTM

C. DIN

D. IBR

E. BS

1919. Equivalent evaporation is the amount of water evaporated in a boiler from and at ____________________?
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A. saturation temperature at given pressure

B. 20C

C. room temperature

D. 100C

E. 0C

1920. 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

1921. If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by___________________?
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A. none of the above

B. throttling calorimeter

C. separating calorimeter

D. combined separating and throttling calorimeter

E. bucket calorimeter

1922. Boiler H.P. is defined as the ________________ ?
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A. the evaporation of 15.65 kg of water per hour from and at 100C into dry saturated steam

B. work done by 1 kg of steam at saturation condition

C. work done in evaporating 1 kg of steam per hour from and at 100C into dry saturated steam

D. steam evaporation rate per kg of fuel fired

E. heat consumed in evaporating 1 kg water at 0C to steam at 100C and 1.033 kg/cm pressure

1923. In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than_______________?
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A. frictional force

B. none of the above

C. viscosity

D. all of the above

E. surface friction

1924. On Mollier chart, flow through turbine is represented by ________________?
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A. none of the above

B. straight inclined line

C. curved line

D. vertical straight line

E. horizontal straight line

1925. The biggest size of thermal power unit operating in India is ________________?
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A. 30 MW

B. 210 MW

C. 500 MW

D. 60 MW

E. 100 MW

1926. According to Bernoullis equation for steady ideal fluid flow____________________?
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A. the energy is constant along a stream-line but may vary across streamlines

B. none of the above

C. principle of conservation of mass holds

D. velocity and pressure are inversely proportional

E. total energy is constant throughout

1927. Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________?
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A. none of die above

B. force of adhesion

C. force of friction

D. force of diffusion

E. force of cohesion
1928. Rotameter is a device used to measure______________?
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A. velocity of fluid

B. velocity of air

C. flow

D. absolute pressure

E. rotation

1929. Bomb calorimeter is used to determine ___________________?
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A. Higher calorific value at constant pressure

B. Lower calorific value at constant pressure

C. None of the above

D. Lower calorific value at constant volume ,

E. Higher calorific value at constant volume
1930. The basic purpose of drum in boiler is to_____________________?
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A. remove salts from water

B. separate steam from water

C. serve as storage of steam

D. serve as storage of feed water for water wall

E. control level

1931. The region between the separation streamline and the boundary surface of the solid body is known as__________________?
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A. drag

B. boundary layer

C. aerofoil section

D. lift

E. wake
1932. Adiabatic process is________________?
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A. reversible process

B. constant temperature process

C. constant enthalpy process

D. non-heat transfer process

E. essentially an isentropic process

1933. Practical fluids___________________?
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A. possess none of the above properties

B. possess all the above properties

C. are compressible

D. are viscous

E. possess surface tension

1934. The equivalent evaporation of a boiler is a measure to compare _________________?
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A. any type of boilers operating under any conditions

B. two different makes of boilers operating under the same operating conditions

C. two boilers of same make but operaing under different conditions

D. the given boiler with the model

E. the two different boilers of the same make

1935. If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Daltons law, the pressure in condenser is equal to__________________?
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A. non of these

B. Ps-Pa

C. pa-ps

D. Pa+P
1936. Which of the following varieties of coals is mostly used in steam boilers____________________?
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A. brown coal

B. peat

C. non-coking bituminous coal

D. coking bituminous coal

E. none of the above
1937. Boiler stays are used to___________________?
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A. take care of failure in compression

B. take care of failure in shear

C. provide foundation of boiler

D. prevent flat surfaces under pressure from tearing apart

E. provide support for boiler

1938. During polytropic process_________________?
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A. heat transfer takes place across cylinder walls

B. none of the above

C. work is done

D. steam may be wet, dry or superheated after expansion

E. all of the above
1939. Which of the following gases has the highest calorific value ________________?
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A. water gas

B. coal gas

C. blast furnace gas

D. coke oven gas

E. producer gas

1940. 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. 50%

B. 40%

C. 90%

D. 25%

E. 80%
1941. Steam engine operates on_________________?
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A. Stirling cycle

B. none of the above

C. joule cycle

D. carnot cycle

E. brayton cycle
1942. 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. 24.5 mm, 65 mm

D. 47.5 mm, 130 mm
1943. A wet vapour can be completely specified by__________________?
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A. pressure only

B. pressure and dryness fraction

C. temperature only

D. dryness fraction only

E. specific volume only

1944. The fusible plug in small boilers is located ________________?
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A. at the inlet of chimney

B. in the fire tubes

C. above steam dome

D. over the combustion chamber

E. in the drum

1945. The difference of pressure between the inside and outside of a liquid drop is _______________?
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A. p = Txr

B. p = 2T/r

C. p = T/2r

D. p = T/r

E. none of the above

1946. Which type of boiler can meet rapid changes of load____________________?
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A. vertical water tube type

B. forced circulation type

C. horizontal water tube type

D. horizontal fire tube type

E. vertical fire tube type

1947. The flow which neglects changes in a transverse direction is known as_________________?
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A. streamline flow

B. uniform flow

C. one dimensional flow

D. steady flow

E. turbulent flow

1948. The bulk modulus of elasticity___________________?
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A. has the dimensions of 1/pressure

B. is independent of pressure and viscosity

C. increases with pressure

D. is large when fluid is more compressible

E. is directly proportional to flow

1949. The function of injector used in small steam plants is to________________?
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A. dose chemicals in feed water

B. control steam temperature by injecting water

C. create vacuum at turbine exhaust

D. pump feed water

E. create vacuum in furnace

1950. Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________?
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A. (1- moisture content)

B. 1 + moisture content

C. 1 moisture content

D. (1 + moisture content)