A.a spindle lubricator
B.an oil jet
C.internal splashing
D.drilled passages in the crankshaft
[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]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]C.rankcase explosions in propulsion diesel engines result fromA.the splashing of lubrication oil by the crankshaftB.the dilution of crankcase oil with particles of combustionC.broken fuel lines spraying oil on the crankcaseD.the ignition of unburned
[单选题]C.rankcase explosions in propulsion diesel engines result from ____.A.the splashing of lubrication oil by the crankshaftB.the dilution of crankcase oil with particles of combustionC.broken fuel lines spraying oil on the crankcaseD.the ignition of unb
[单选题]Crankshafts of medium speed engines are () from a single piece of steel.A . unusually solid weldedB . never be solid forgedC . almost invariably solid forgedD . almost invariably be welded
[单选题]The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the () cycle.A . two-strokeB . four-stokeC . long-strokeD . short-stroke
[单选题]Most medium and slow speed diesels are started by what medium?()A . Electric starting motorsB . HydraulicsC . Compressed airD . Ether
[单选题]Pistons of marine medium speed diesel engines may be made of () in order to keep the weight down for balancing purpose at high speed.A . leadB . forged steelC . alloy steelD . aluminum alloy
[单选题]In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the _____.A.governor droopB.speeder spring tensionC.fuel rack lagD.load on the engine