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.

[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

[单选题]The quantity of oil injected into the cylinder can be regulated （）.A . by turning the pump plungerB . by vary the fuel valve spring forceC . by no means by controlling the governorD . by enlarging or diminishing the injection hole

[单选题]Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during （）.A . the power strokeB . the compression strokeC . low load operation onlyD . periods of standby

[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]If quantity supplied of refrigerators exceeds quantity demanded at the curr

[单选题]As to the bearing, of the following, which statement is not true?（）A . ff overheat is found, the engine must be stopped for inspectionB . Much heat of the crankcase door indicates that the bearing is overheatedC . If bearing clearance is too large, k

[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 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