单项选择题
The lube oil pump used in a diesel engine is a （）.
A.volute pump
B.centrifugal pump
C.diaphragm pump
D.gear pump
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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
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
