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[主观题]

The four-stroke engine is used for _____ and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.

A.alternator

B.turbo-charger

C.remote controller

D.windlass

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第1题

When you are asked to assist in accepting delivery of goods, you should .

A.make clear of your authority

B.make friends with ships crew

C.call the first engineer if there is a problem

D.call the master if there is a problem

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第2题

_____ is used to produce electric power.

A.An alternator

B.fresh water generator

C.A compressor

D.A clarifier

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第3题

When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?

A.During operation at low speed

B.During operation at rated speed, but low power output

C.During acceleration

D.All of the above

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第4题

The device used for preventing the passage of flames into enclosed spaces is called a _____.

A.flame relief valve

B.flame stopper

C.safety valve

D.flame arrester

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