单项选择题
A.cast iron B.forged steel C.stainless steel D.aluminum alloy
Piston No2 of main engine has been removed, and it will...
单项选择题Piston No2 of main engine has been removed, and it will be （） by noon tomorrow.
A.lifted B.reassembled C.dismounted D.disassembled
Persistent knocking in one cylinder of a diesel engine ...
单项选择题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
Operating conditions in the crank chamber are very （） t...
单项选择题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
