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【单选题】

Two main lubricating oil pumps are usual and are obligatory in （）.

A、container ships

B、bulk carriers

C、passenger ships

D、barges

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更多“Two main lubricating oil pumps are usual and are obligatory in （）.”相关的问题

第1题

[单选题] Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.

A、cylinder liners and piston rings B、main bearings C、crankpin bearings D、turboblower

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第2题

[单选题] Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）

A、bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed B、bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed C、the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine D、two-stoke/cycle diesel engines require more complicated lubrication piping

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第3题

[单选题] A grease gun is generally used to lubricate a （）.

A、condensate pump ball bearing B、main shaft bearing C、main turbine bearing D、diesel engine wrist pin bearing

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第4题

[单选题] Large crosshead type engine generally has two lubrication systems, a function performed only by crankcase oil system is（）

A、lubricating B、cooling C、cleaning D、neutralizing

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第5题

[单选题] On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.

A、a spindle lubricator B、an oil jet C、internal splashing D、drilled passages in the crankshaft

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第6题

[] Large crosshead type engine generally has two lubrication systems, a function performed only by cylinder oil system is（）

A、A.lubricating B、B.cooling C、C.sealing D、D.cleaning

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第7题

[单选题] Generally the function of lubrication is to form of a film of lubricant between any two surfaces that have relative （）, so that surfaces dont get touch with each other.

A、gravity B、motion C、ratio D、density

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第8题

[单选题] There should be a lubricating oil （） between the main beatings and the crankshaft.

A、film B、cap C、lacquer D、shell

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第9题

[] In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.

A、A.metal particles loosened by wear B、B.air when no air cleaners are used C、C.condensation of water vapors D、D.breakdown of the lubricating oil by dilution

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