单项选择题

The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）

A.check the cylinder exhausts for black smoke
B.listen for combustion knock in that cylinder
C.isolate each cylinder and inspect the injector
D.check the cylinder exhaust temperature frequently

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单项选择题

Diesel engine mufflers or silencers reduce the engine exhaust noise by （）

A.passing the exhaust through long head pipes
B.diffusing exhaust vibrations through activated carbon baffles
C.increasing the exhaust gas velocity
D.reducing the exhaust gas velocity

单项选择题

If a diesel engine were running at 20% overload with a smoky exhaust, you should（）

A.stop the engine immediately to prevent damage
B.increase lube oil pressure
C.slow the engine allowing it to gradually cool
D.decrease the cooling water it temperature to the water jacket

单项选择题

A substantial increase pressure could be an indication of a/an （）

A.worn cylinder liner
B.faulty cylinder relief valve
C.excessive lube oil pressure
D.excessive scavenge air pressure