单项选择题

An indication of an overloaded main propulsion diesel engine is （）

A.white smoke in the exhaust
B.high exhaust gas pyrometer readings
C.sparks in the exhaust
D.blue smoke in the exhaust

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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

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