77) The equivalent evaporation is defined as

the ratio of heat actually used in producing the steam to the heat liberated in the furnace

the amount of water evaporated or steam produced in kg per kg of fuel burnt

the amount of water evaporated from and at 100 Degree Centigrade into dry and saturated steam

the evaporation of 15.653 kg of water per hour from and at 100 Degree Centigrade

Answer is:

the amount of water evaporated from and at 100 Degree Centigrade into dry and saturated steam

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78) Locomotive boiler is a

single tube, horizontal, internally fired and stationary boiler

single tube, vertical, externally fired and stationary boiler

multitubular, horizontal, internally fired and mobile boiler

multitubular, horizontal, externally fired and stationary boiler

Answer is:

multitubular, horizontal, internally fired and mobile boiler

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

swept volume

clearance volume

total volume

none of these

Answer is:

swept volume

Explanation:

The ratio of clearance volume to the swept volume is called clearance ratio.

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

The ratio of volume at cut-off to the swept volume is known as cut-off ratio. It is the reciprocal of expansion ratio.

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

Yes

Unknown

None

Answer is:

Yes

81) The governing of steam engines keep the engine speed constant according to the changing load conditions

Yes

Unknown

None

Answer is:

Yes

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