单选题 The amount of heat released by steam when it changes to water at the same temperature is called ( ).

A、 latent heat of condensation
B、 latent heat of vaporization
C、 latent heat of saturation
D、 sensible heat of condensation
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单选题 In a ( ) boiler the hot gases from the furnace pass through the tubes while the water is on the outside.

A、water-tube
B、fire-tube
C、exhaust gas
D、composite

单选题 The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust ( ).

A、gas composition
B、gas temperature
C、pressure
D、timing

单选题 The primary function of a waste heat boiler is to ( ).

A、reduce engine exhaust noise
B、reduce engine back pressure
C、recover heat which otherwise would be lost
D、increase turbocharger efficiency

单选题 A waste heat boiler is installed on some diesel propelled vessels to ( ).

A、provide steam for emergency propulsion
B、provide steam for the turbo-generator
C、heat the waste water tanks
D、steam for warming engines

单选题 Diesel engine waste heat boiler construction is usually of the fire-tube or ( ).

A、cyclone furnace boiler type
B、dry back boiler type
C、water-tube type
D、critical circulation boiler type

单选题 One function of a waste heat boiler is to ( ).

A、reduce engine exhaust noise
B、reduce engine back pressure
C、increase engine cycle efficiency
D、increase turbocharger efficiency

单选题 Which of the following statements concerning fire-tube boilers is correct ?

A、Combustion gases flow through the tubes.
B、Flames impinge on the tubes.
C、Combustion occurs in the tubes.
D、Water flows through the tubes.

单选题 In motor ship, ( ) is often used to recover some of the heat carried in the exhaust gases from the main engine.

A、a diesel oil heater
B、a waste heat boiler
C、a fresh water generator
D、a donkey boiler