單項(xiàng)選擇題

Most fuel injection nozzles are opened by （）.

A.fuel oil pressure
B.a cam operated follower
C.a spring-loaded pressure plate
D.timing gears keyed to the crankshaft

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單項(xiàng)選擇題

The total starting air capacity required for reversible main engines is to be sufficient for at least （）.

A.six consecutive starts
B.eight consecutive starts
C.ten consecutive starts
D.twelve consecutive starts

單項(xiàng)選擇題

A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.

A.cylinder heads
B.exhaust valves
C.scavenging air
D.injectors

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