In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the （）.

[单选题]Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.A . lower than；can lubricateB . lower than；can coolC . higher than；can enterD . higher than ；cannot enter

[名词解释] 点式调速系统 point type speed control system

[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 . gravityB . motionC . ratioD . density

[单选题]In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .A．all of the oil used by the engine through a filterB．some of the oil used by the engine through a filterC．some of the oil used by the engine thro

[单选题]Lubrication for the main reduction gears used with diesel engines is usually supplied byA．oil from the main engine sumpB．an independent lube oil systemC．the stern bearing head tankD．the stem bearing sump tank

[单选题]Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.A．The direction of pressure on the journal in four-stroke engine is continuou

[名词解释] 英译汉：lubrication

[单选题]The oil quantity for bearing lubrication should be applied in such an amount as to be sufficient to carry away the （） caused by the friction at the bearings.A . acidsB . additivesC . heatD . gear

[单选题]The main function of the lubrication system in to enable （） of a film of oil between the moving parts.A . the informationB . the formationC . the scatterD . the frictio

[单选题]It is well known that good lubrication will （） the bearings from becoming overheated.A . presentB . preventC . avoidD . provide