單項選擇題On opposite ends of a single shaft of a turboblower are a gas driven ()and a air compressor, which are sealed each other.

A.charge air receiver
B.scavenging air belt
C.turbine
D.air cooler


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2.單項選擇題On a diesel engine, fuel is delivered into the combustion space by ().

A.a cooling system
B.a lubrication oil system
C.an electric system
D.an injection system

3.單項選擇題Oil will lubricate these parts () effectively than water.

A.much
B.more
C.most
D.less

4.單項選擇題Oil pressure in the lubrication system is () the static sea water head to ensure that sea water () the stem-tube.

A.lower than;can lubricate
B.lower than;can cool
C.higher than;can enter
D.higher than ;cannot enter

5.單項選擇題Oil is supplied to the cylinder wall and () by means of mechanical lubricators.

A.the cylinder cover
B.the piston rings
C.the piston crown
D.the piston skirt