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【单选题】

A diesel driven emergency generator is prevented from being paralleled with the ships service generators by （）

A、an electrical interlock system

B、an automatic paralleling trip switch

C、the synchronizing oscilloscope

D、the reverse current relay

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第1题
[] In a diesel engine, a positive displacement type blower is usually （）

A、A.gear drive by the engine  B、B.driven by an exhaust gas turbine  C、C.driven by a camshaft  D、D.driven by separate motor  

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第2题
[单选题] A hydraulic motor may be driven by （）.

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第3题
[] An electrically driven automatically operating auxiliary blower is provided for slow speed and （） of a low speed diesel engine.

A、A.manoeuvring operations  B、B.bad combustion  C、C.cooling  D、D.mooring trial  

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第4题
[单选题] “This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）

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第5题
[单选题] Vessel constrained by her draught is（）.

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第6题
[单选题] The ship（）on a low rock was broken in two by the waves.

A、that had been driven  B、had been driven  C、have been driven  D、which to have been driven  

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第7题
[单选题] The ship（）on a low rock was broken in two by the waves.

A、that had been driven  B、had been driven  C、have been driven  D、which to have been driven  

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第8题
[单选题] On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the （）.

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第9题
[] 要使紧急刹车工作（）

A、A、将刹车手柄拉到EMER位  B、B、将刹车手柄拉到EMER位，踩脚蹬  C、C、将刹车手柄放任意位，踩脚蹬施加最大刹车压力  D、D、以上人一个都可以  

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