121. The diameter of fire tubes in Cochran boiler is of the order of___________________?
A. 2 cm
B. 6 Cm ,
C. 8 cm
D. 12 cm
E. 15 cm

122. A safety valve in a locomotive starts leaking. The leaking medium will be_________________?
A. water
B. dry steam
C. wet steam
D. super heated steam
E. supersaturated steam

123. In regenerative air preheater, the heat is transferred _____________________?
A. from a metal wall from one medium to another
B. from heating an intermediate anaterial and then heating the air from this material
C. by direct mixing
D. heat is transferred by bleeding some gas from furnace
E. none of the above

124. The pressure of reheat steam after passing through reheater compared to inlet condition is _________________?
A. more
B. less
C. equal
D. may be more or less depending on capacity of reheater
E. none of the above

125. The safety valve at super heater as compared to drum safety valve setting is set at___________________?
A. higher value
B. lower value
C. same value
D. any value
E. none of the above

126. Steam exhaust from high pressure turbine is reheated in _____________________?
A. boiler drum
B. superheater tubes
C. economiser
D. a separate coil
E. a separate coil located in convection path

127. Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?
A. desirable
B. economical
C. essential
D. optional
E. uneconomical

128. Reheating of steam under ideal conditions takes place at constant __________________?
A. entropy
B. enthaply
C. pressure
D. temperature
E. all of the above

129. Proximate analysis of fuel is determination of percentage of ____________________?
A. carbon, hydrogen, nitrogen, sulphur, moisture
B. fixed carbon, ash, volatile matter, moisture
C. higher calorific value
D. lower calorific value
E. rough analysis

130. Bomb calorimeter is used to determine ___________________?
A. Higher calorific value at constant volume
B. Lower calorific value at constant volume ,
C. Higher calorific value at constant pressure
D. Lower calorific value at constant pressure
E. None of the above

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