In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）

[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

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

[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]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]Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.A . exhaust gas temperature systemB . exhaust load systemC . constant or pulse pressure systemD . constant

A slow-speed two-stroke diesel is usually arranged to operate continuously onhea

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

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

[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]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