101. A device used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit, is called
blow off cock
stop valve
superheater
none of these
✅ The correct answer is option D.
Steam Boilers and Engines MCQs
102. The length of Cornish boiler varies from
2 to 4.5 m
3 to 5 m
5 to 7.5 m
7 to 9 m
✅ The correct answer is option C.
103. When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by
none of these
✅ The correct answer is option A.
104. Which of the following compound steam engine requires a smaller flywheel ?
Receiver type
Tandem type
Woolf type
all of these
✅ The correct answer is option A.
105. Cut-off ratio is the ratio of
swept volume to the volume at cut-off
volume at cut-off to the clearance volume
volume at cut-off to the swept volume
clearance volume to th
✅ The correct answer is option C.
106. The draught is the __________ of pressures above and below the fire grate.
sum
difference
✅ The correct answer is option B.
107. Which of the following is a water tube boiler ?
Lancashire boiler
Babcock and Wilcox boiler
Locomotive boiler
Cochran boiler
✅ The correct answer is option B.
108. The water tubes in a Babcock and Wilcox boiler are
vertical
horizontal
inclined
✅ The correct answer is option C.
109. The motion of a D-slide valve in a steam engine is simple harmonic.
Yes
No
✅ The correct answer is option A.
110. Lancashire boiler is used where working pressure and power required are
low
moderate
high
none of these
✅ The correct answer is option B.