單項選擇題（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.

A.Except for
B.Beside
C.Except
D.In addition to


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1.單項選擇題（） or air venting arrangement is fitted to the fuel supply passage.

A.An air pump
B.A compressor
C.A fuel pump
D.A priming

2.單項選擇題（） neutralizes the acid conditions and（） cleanses the rings and grooves.

A.The detergency；the alkalinity
B.The alkalinity；the detergency
C.The inhabitant；the water
D.The additives；the distilled water

3.單項選擇題（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.

A.An air receiver
B.An operating valve
C.An automatic valve
D.An air distributor

4.單項選擇題（） is made of a boss with separated blades mounted into it.

A.A variable pitch propeller
B.A variable pitch nut
C.A fixed pitch parallel
D.A fixed pitch screw

5.單項選擇題（） is fully floating in both connecting rod small end and the piston skirt.

A.The piston rod
B.The cross head pin
C.The gudgeon pin
D.The crank-pin