Lubrication for the main reduction gears used with diesel engines is usually supplied by

A．oil from the main engine sump

B．an independent lube oil system

C．the stern bearing head tank

D．the stem bearing sump tank

[单选题]In using reduction gears to obtain efficient propeller speeds, （）.A . they must be located at the after end of the engineB . they can only be used with one engine at a timeC . they eliminate the need for controllable pitch propellersD . they are conn

[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

[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

[问答题] 什么是Google Gears？

[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

[问答题] 如何变更Google Gears的设定？

[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]In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the （）.A . lube oil pump suction lineB . lube oil pump discharge lineC . bottom of the lube oil sumpD . outlet from the lube oil header

[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