Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）decrease the time required between cleanings removes all large and small foreign objects ensure a positive flow of oil at all times ensure that all lube oil has been treated twice

[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

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

[单选题]For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.A . a gravity tankB . a sumpC . a vesselD . a bottle

[单选题]Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.A . fuel oil vapor at the sludge tank ventB . unburned fuel vapors in the scavenge air receiverC . lube oil vapors in the crank caseD . lub

[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

[单选题]In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）A . Bed plateB . ColumnC . EntablatureD . Tie rod

[单选题]On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.A . banjo feedB . splash feedC . gravity feedD . pressure feed

On a medium-speed main propulsion diesel engine, the crank-pin or crank journalb

[单选题]All marine low-speed diesels are of what design?（）A . Four-strokeB . Two-strokeC . Electronic ignitionD . Forced exhaust

[单选题]One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.A . the extra weight required for the diesel reduction gearingB . a minimum speed for the engines that limits the minimum speed of the vesselC . the highe