單項選擇題Fuel is delivered into the combustion space by （）.

A.a cooling system
B.a lubricating system
C.an electric system
D.an injection system


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1.單項選擇題Fuel injection valves should be taken out, cleaned, and lifting checked every （）.

A.two to four months
B.four to six months
C.six to eight months

3.單項選擇題Fuel injected into a diesel engines cylinder is ignited by （）.

A.the heat compressed fuel/air mixture in the cylinder
B.the fuel igniter
C.the fuel injector
D.the fuel pump

4.單項選擇題Fuel has been injected but ignition fails The possible cause may be （）.

A.leaky exhaust valve
B.increased scavenging air temperature
C.engine cylinders not scavenged sufficiently
D.water in the fuel oil

5.單項選擇題Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.

A.cylinder covers
B.lubricating space
C.crosshead
D.exhaust manifold