单项选择题
A.a brief trial with turning gear B.a brief trial on power C.a long trial by steering gear D.one minutes trial with windlass
Bedplates are the （） of the engine, without the support...
单项选择题Bedplates are the （） of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.
A.hull B.projection C.graphitization D.foundation
Because the castings of smaller engines are not so big ...
单项选择题Because the castings of smaller engines are not so big and heavy, （） and cylinder block may be made in one piece.
A.the column B.the jacket C.cylinder cover D.cylinder liner
Bearing knocks are likely to occur from （）.A.less clear...
单项选择题Bearing knocks are likely to occur from （）.
A.less clearance B.dirty lube oil C.overload D.bearing wear
