Steam Boilers and Engines MCQs

203. The function of a flywheel is

to convert reciprocating motion of the piston into rotary motion.
to convert rotary motion of the crankshaft into to and fro motion of the valve rod
to prevent fluctuation of speed
to keep the engine speed uniform at all load conditions
✅ The correct answer is option C.

208. The function of a safety valve is

to blow off steam when the pressure of steam inside the boiler exceeds the working pressure
to indicate the water level inside the boiler to an observer
to measure pressure of steam inside the steam boiler
none of the above
✅ The correct answer is option A.

210. The aim of a compound steam engine is

to reduce the ratio of expansion in each cylinder
to reduce the length of stroke
to reduce the temperature range in each cylinder
all of the above
✅ The correct answer is option D.
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