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

In a trunk engine the cylinder lubrication is done by the oil mist thrown up by_

[单选] In a bypass type lubrication system for a diesel engine， the dirty oil line

Cylinder lubrication oil for low speed main propulsion diesel engines is admitte

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

[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