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單項(xiàng)選擇題

In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the （）.

A.starting air and fuel pumps
B.piston cooling pumps
C.exhaust valves
D.all of the above

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單項(xiàng)選擇題

A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （）
(1) MEP is lower and the scavenging air is cooling the exhaust gases
(2) valve overlap in a four-stroke

A.(1) only is correct
B.(2) only is correct
C.both (1) and (2) are correct
D.Neither (1) or (2) are correct

單項(xiàng)選擇題

A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.

A.water
B.babbitt
C.iron or steel
D.acids