单项选择题

When a diesel engine compression pressure is checked, the indicator is connected to the （）

A.cylinder exhaust ports
B.injection line
C.cylinder indicator cock
D.banjo oiler line

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单项选择题

Diesel engine mufflers accomplish noise reduction by （）

A.reducing exhaust gas velocity
B.increasing the frequency of gas vibration
C.the use of long head pipes
D.the use of zinc electrodes

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

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