單項選擇題

Dirt in the fuel oil system of a diesel engine can cause （）.

A.clogged filters
B.poor combustion
C.overloading of the diesel
D.shock of fuel lines

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單項選擇題

Diesel oil may be used to cool （） of a diesel engine.

A.cylinders
B.exhaust valves
C.pistons
D.fuel valves

單項選擇題

Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

A.fuel oil
B.diesel oil
C.compressed air
D.jacket water