Mechanical Engineering - Steam Boilers and Engines

26. 

Water tube boilers produce steam at a __________ pressure than that of fire tube boilers.

A. lower
B. higher

Answer: Option B

Explanation:

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27. 

The equivalent evaporation is defined as

A. the ratio of heat actually used in producing the steam to the heat liberated in the furnace
B. the amount of water evaporated or steam produced in kg per kg of fuel burnt
C. the amount of water evaporated from and at 100° C into dry and saturated steam
D. the evaporation of 15.653 kg of water per hour from and at 100° C

Answer: Option C

Explanation:

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28. 

Locomotive boiler is a

A. single tube, horizontal, internally fired and stationary boiler
B. single tube, vertical, externally fired and stationary boiler
C. multitubular, horizontal, internally fired and mobile boiler
D. multitubular, horizontal, externally fired and stationary boiler

Answer: Option C

Explanation:

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29. 

The ratio of the __________ to the volume at cut-off is called expansion ratio.

A. swept volume
B. clearance volume

Answer: Option A

Explanation:

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30. 

In water tube boilers, the water passes through the tubes which are surrounded by flames and hot gases.

A. Yes
B. No

Answer: Option A

Explanation:

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