Mechanical Engineering - Steam Boilers and Engines

6. 

Loeffler boiler is a water tube boiler using a forced circulation of water.

A. True
B. False

Answer: Option A

Explanation:

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7. 

La-mont boiler, is a high pressure water tube steam boiler working on forced circulation.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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8. 

The function of a connecting rod is not to convert reciprocating motion of the piston into rotary motion.

A. True
B. False

Answer: Option B

Explanation:

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9. 

Which of the following statement is correct for a compound steam engine ?

A. The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
B. The forces in the working parts are increased as the forces are distributed over more parts.
C. The ratio of expansion is reduced, thus reducing the length of stroke.
D. The temperature range per cylinder is increased, with corresponding increase in condensation.

Answer: Option C

Explanation:

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10. 

When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a

A. slow speed engine
B. medium speed steam engine
C. high speed steam engine
D. none of these

Answer: Option B

Explanation:

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