Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during _____.

[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

Most large, low-speed, main propulsion diesel engines use duplex lube oil strain

[单选题]In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.A . inefficiencyB . oilinessC . detergencyD . purity

[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 lubricatorB . an oil jetC . internal splashingD . drilled passages in the crankshaft

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

[单选题]A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.A . cylinder headsB . exhaust valvesC . scavenging airD . injector

[单选题]Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.A . the cylinder coverB . the piston ringsC . the piston crownD . the piston skirt

[单选题]In addition to lubricating, cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner.A . additivesB . waterC . greaseD . acid solutio

[单选题]In a diesel engine, excessive cylinder liner wear will cause （）(1) increased blow-by(2) wear between the piston ring and grooveA . (1) only is correctB . (2) only is correctC . both (1) and (2) are correctD . neither (1) or (2) axe correct

[单选题]Turbulence in a diesel engine cylinder is of major importance in providing （）.A . proper fuel meteringB . complete fuel/air mixingC . minimal fuel penetrationD . proper fuel timing