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單項選擇題

Piston No2 of main engine has been removed, and it will be （） by noon tomorrow.

A.lifted
B.reassembled
C.dismounted
D.disassembled

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單項選擇題

Persistent knocking in one cylinder of a diesel engine could be caused by（）.

A.a low load on that cylinder
B.sluggish piston ring action
C.excessive piston crown cooling
D.excessive clearance of piston pin

單項選擇題

Operating conditions in the crank chamber are very （） those in the cylinder.

A.the same as
B.similar to
C.separated from
D.different from

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