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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1.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

3.單項選擇題Diesel engines are started by supplying () into the cylinders in the appropriate sequence for the required direction.

A.cooling water
B.compressing air
C.compressed air
D.cylinder oil

4.單項選擇題Cylinders of marine diesel engines are normally cooled by ().

A.sea water
B.fine mineral oil
C.sanitary water
D.fresh water

5.單項選擇題Cylinder liner cooling is often referred to as ().

A.piston cooling
B.sleeve cooling
C.central cooling
D.jacket cooling