单项选择题
A.volute pump B.centrifugal pump C.diaphragm pump D.gear pump
Most fuel injection nozzles are opened by （）.A.fuel oil...
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
The total starting air capacity required for reversible...
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
A large, low-speed, main propulsion diesel engine uses ...
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
