to determine the generating capacity of the boiler
to determine the thermal efficiency of the boiler when working at a definite pressure
to prepare heat balance sheet for the boiler
all of the above
✅ The correct answer is option D.
Steam Boilers and Engines MCQs
112. Babcock and Wilcox boiler is a stationary type of water tube boiler.
Correct
Incorrect
✅ The correct answer is option A.
113. The length of Lancashire boiler varies from
5 to 6 m
6 to 7 m
7.25 to 9 m
9 to 10 m
✅ The correct answer is option C.
114. The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as
feedpump
injector
feed check valve
pressure gauge
✅ The correct answer is option A.
115. The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called
condenser efficiency
vacuum efficiency
nozzle efficiency
boiler efficiency
✅ The correct answer is option A.
116. For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is __________ the piston speed of single acting steam engine.
equal to
twice
three times
four times
✅ The correct answer is option B.
117. The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
efficiency of the boiler
efficiency of the chimney
efficiency of the fan
power of the boiler
✅ The correct answer is option B.
118. The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.
Correct
Incorrect
✅ The correct answer is option A.
119. The rate of flow of steam is __________ in case of fire tube boilers.
less
more
✅ The correct answer is option A.
120. A compound steam engine requires a heavier flywheel than simple steam engines.
TRUE
FALSE
✅ The correct answer is option B.