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單項(xiàng)選擇題

In the （） pressure charging system the pulse of energy that occur as the exhaust is released from the cylinder to improve the output of the turbocharger.

A.constant
B.pulse
C.high
D.none of the above

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單項(xiàng)選擇題

In some designs the cylinder oil is timed so that the oil injects only on the （）.

A.piston crown
B.piston groove
C.piston skirt
D.piston ring belt

單項(xiàng)選擇題

In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be （）.

A.craned out
B.rolled out
C.lifted out
D.turned out