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【单选题】

Oil slick caused by spillage of oil from tanker ship is().

A、a drop of oil

B、the emulsion of oil at sea surface

C、the weathered oil

D、the oil floating on the surface of the sea water

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第2题

A、gums, acids, and varnishes  B、removed by cellulose type filters  C、neutralized by oil additives  D、not removed by absorbent filters  

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第3题

A、A.Oil vapour in air piping are dangerous  B、B.Explosion will cause oil vapouring in air lines  C、C.Oil vapour in air piping should be drained  D、D.Oil in air piping should not be drained  

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第4题

A、using a slightly dirty air filter  B、using oil having an excessive viscosity  C、intercooler or after-cooler leaks  D、carrying the oil level higher than normal  

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第5题

A、clogged lube oil piping  B、excessive valve-guide clearance  C、high lube oil viscosity  D、low lube oil temperature  

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第6题

A、refrigerant boiling out of solution from the lube oil  B、liquid refrigerant flooding the compressor and system  C、lube oil viscosity being reduced by refrigerant dilution  D、compressor suction pressure suddenly increasing  

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第7题

A、water in the fuel oil  B、excessive cycling  C、high fuel oil pressure  D、improper burner maintenance  

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第9题

A、high lube oil temperature  B、low lube oil temperature  C、excessive cylinder cooling  D、high air injection pressure  

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