题目内容

Steam generated by boilers may be used for driving the main engine when( ) are fitted.

A. diesel engines
B. gas engines
C. gas turbines
D. steam turbines

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Circulation in a water-tube boiler is caused by the difference in the( )

A. area and length of the water-tubes
B. densities of the circulating water
C. heights of the boiler drum
D. angle of inclination of the tubes

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Which of the following statements is NOT the characteristic of fire-tube boiler?( )

A. Natural good circulation.
B. Capable of operating with poor quality feed water.
C. Providing low pressure steam.
D. Hot furnace gas passing through the tubes.

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Marine boilers are used for producing steam which may be used for the following except( )

A. driving auxiliary machinery
B. driving the main engines
C. heating heavy oil
D. producing drinking water

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In which of the listed components is chemical energy converted to thermal energy with regards to boiler operation?( )

A. Furnace.
B. Super-heater.
C. Steam drum.
D. Economizer.

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Steam generated by boilers may be used for driving the main engine when( ) are fitted.

A. diesel engines B. gas engines C. gas turbines D. steam turbines

Circulation in a water-tube boiler is caused by the difference in the( )

Which of the following statements is NOT the characteristic of fire-tube boiler?( )

Marine boilers are used for producing steam which may be used for the following except( )

In which of the listed components is chemical energy converted to thermal energy with regards to boiler operation?( )

A. diesel engines
B. gas engines
C. gas turbines
D. steam turbines