81. The artificial draught is produced by
steam jet
centrifugal fan
chimney
both (a) and (b)
✅ The correct answer is option D.
Steam Boilers and Engines MCQs
82. The capacity and working pressure.of a Cornish boiler is __________ as compared to Lancashire boiler.
low
high
✅ The correct answer is option A.
83. By compounding the expansion of steam in two or more cylinders, the length of stroke
does not change
increases
decreases
✅ The correct answer is option C.
84. A single ended Scotch marine steam boiler may have one to four furnaces which enter from front end of the boiler.
Correct
Incorrect
✅ The correct answer is option A.
85. Which of the following is not a boiler mounting?
Blow off cock
Feed check valve
Economiser
Fusible plug
✅ The correct answer is option C.
86. The shell of the Cochran boiler is made hemispherical
to give maximum space and strength
to withstand the pressure of steam inside the boiler
both (a) and (b)
none of the above
✅ The correct answer is option C.
87. The amount of water evaporated in kg per kg of fuel burnt is called
evaporative capacity of a boiler
equivalent evaporation from and at 100° C
boiler efficiency
none of these
✅ The correct answer is option A.
88. Willian’s law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)
I.P.
(I.P.)2
✅ The correct answer is option C.
89. In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.
TRUE
FALSE
✅ The correct answer is option B.
90. The fire tubes in a Locomotive boiler has __________ diameter.
4.75 mm
5.47 mm
7.45 mm
47.5 mm
✅ The correct answer is option D.