C．rankcase explosions in propulsion diesel engines result from

A．the splashing of lubrication oil by the crankshaft

B．the dilution of crankcase oil with particles of combustion

C．broken fuel lines spraying oil on the crankcase

D．the ignition of unburned fuel and air in the crankcase

[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]On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).A．a spindle lubricatorB．an oil jetC．internal splashingD．drilled passages in the crankshaft

[单选题]A． magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles ofA．waterB．babbittC．iron or steelD．acids

[单选题]The pressure differential across a diesel engine lube oil system duplex filter should be checked to ________.A．determine the need for filter cleaningB．measure any change in oil viscosityC．prevent damage to the filterD．determine the need for batch fil

[单选题]The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the （）.A . turbocharger stallsB . exhaust pressure increasesC . air charge density decreasesD . scavenge effect incre

[单选题]A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.A . waterB . babbittC . iron or steelD . acid

[单选题]The crankcase can not be opened （）the parts have been cooled down.A . ifB . asC . unlessD . whe

[单选题]Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）A . free entry of air to the crankcaseB . water entering the crankcase while engine wash-downs are being performedC . excessive oil lea

[单选题]The crankcase of many diesel engines are kept under a slight vacuum by the （）.A . scavenging action of the pistonB . piston type vacuum pump taking suction off a differential manometerC . gland exhausting manometerD . crankcase exhaust fa

[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