單項(xiàng)選擇題Starting air for auxiliary engines may be taken directly from the main reservoirs or through ().

A.an auxiliary reservoir
B.a controlling air bottle
C.an emergency air compressor
D.a main air compressor


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1.單項(xiàng)選擇題Two main lubricating oil pumps are usual and are obligatory in ().

A.container ships
B.bulk carriers
C.passenger ships
D.barges

2.單項(xiàng)選擇題In motor-ships, (), after passing through main and motion bearings and oil cooled pistons, etcis either retained in the bedplate.

A.the fuel oil
B.the lubricating oil
C.the refrigerating oil
D.the hydraulic oil

3.單項(xiàng)選擇題In motorships,there are two main circuits, ().

A.one salt water, one fresh water
B.one salt water, one fuel
C.one fresh water, one fuel
D.one steam, one fuel

4.單項(xiàng)選擇題Auxiliary machinery covers everything onboard except ().

A.main engines
B.main boilers
C.pipes and fittings
D.A and B

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The treatment of the fuel oils involves storage, heating, filtering and()

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The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()

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()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

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Engine parameters shall be corresponded to NOx Technical Files. This is required by ()

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