151. Which of the following is required for a steam condensing plant ?
Condenser
Condensate pump
Air extraction pump
all of these
✅ The correct answer is option D.
Steam Boilers and Engines MCQs
152. By compounding the expansion of steam in two or more cylinders, the ratio of expansion
does not change
increases
decreases
✅ The correct answer is option C.
153. The function of an eccentric is to provide __________ motion to the slide valve.
reciprocating
rotary
✅ The correct answer is option A.
154. The governing of steam engines keep the engine speed constant according to the changing load conditions
Yes
No
✅ The correct answer is option A.
155. The ratio of the clearance volume to the swept volume is called
cut-off ratio
expansion ratip
clearance ratio
none of these
✅ The correct answer is option C.
156. The damper in a steam boiler is provided to control the draught (i.e. rate of flow of air) and thus regulate the rate of generation of steam.
Correct
Incorrect
✅ The correct answer is option A.
157. A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as
superheater
air preheater
economiser
injector
✅ The correct answer is option B.
158. Which of the following are boiler accessories ?
economiser
superheater
both (a) and (b)
none of these
✅ The correct answer is option C.
159. The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler.
TRUE
FALSE
✅ The correct answer is option A.
160. The high steam and low water safety valve is used to blow off steam when the
steam pressure exceeds the working pressure
water level in the boiler becomes too low
both (a) and (b)
none of the above
✅ The correct answer is option C.