Mechanical Engineering - Steam Boilers and Engines

36. 

The fire tubes in a Cochran boiler are

A. horizontal
B. vertical
C. inclined

Answer: Option A

Explanation:

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37. 

A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly

A. 1.05
B. 2.86
C. 6.65
D. 10.05

Answer: Option B

Explanation:

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38. 

The aim of a compound steam engine is

A. to reduce the ratio of expansion in each cylinder
B. to reduce the length of stroke
C. to reduce the temperature range in each cylinder
D. all of the above

Answer: Option D

Explanation:

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39. 

The average operating pressure of Benson boiler is

A. 100 bar
B. 150 bar
C. 200 bar
D. 250 bar

Answer: Option D

Explanation:

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40. 

The diameter of Cornish boiler varies from

A. 0.5 to 1 m
B. 1 to 2 m
C. 1.25 to 2.5 m
D. 2 to 3 m

Answer: Option B

Explanation:

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