Mechanical Engineering - Steam Boilers and Engines

1. 

For the same diameter and thickness of tube, a water tube boiler has __________ heating surface as compared to fire tube boiler.

A. more
B. less
C. equal

Answer: Option A

Explanation:

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2. 

Throttle governing of steam engines is a method of controlling the engine output by varying

A. volume of intake steam
B. pressure of intake steam
C. temperature of intake steam
D. all of these

Answer: Option B

Explanation:

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3. 

In a double acting steam engine, the steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft.

A. Yes
B. No

Answer: Option B

Explanation:

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4. 

Cornish boilers are multi-tubular boilers.

A. True
B. False

Answer: Option B

Explanation:

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5. 

Expansion ratio is the ratio of

A. swept volume to the volume at cut-off
B. clearance volume to the swept volume
C. volume at cut-off to the swept volume
D. swept volume to the clearance volume

Answer: Option A

Explanation:

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