單項選擇題The engine has one or two group of fuel pumps, depending upon ().

A.the number of fuel valves
B.the number of cylinders
C.the speed of engine
D.the power of engine


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1.單項選擇題The energy for pushing this piston up can be supplied from (), so that the piston can keep moving up and down.

A.the same piston
B.the piston nearby
C.the other pistons
D.the generators on board

3.單項選擇題The distance from TDC to BDC of the diesel engine is called ().

A.gap
B.clearance
C.radius
D.stroke

4.單項選擇題The diffuser prevents pressure pulses from one cylinder () another during operation.

A.to interfere with
B.interfering with
C.to help scavenging
D.helping scavenging

5.單項選擇題The diffuser prevents pressure pulses from one cylinder () another during operation.

A.to interfere with
B.interfering with
C.to help scavenging
D.helping scavenging