单项选择题

The lower section of a piston is called the （）.

A.land
B.skirt
C.crown
D.plate

<上一题 目录 下一题>
热门 试题

单项选择题
The diesel engine valve subjected to most severe conditions of service is the （）.

A.cylinder exhaust valve
B.air starting valve
C.air inlet valve
D.cylinder relief valve
单项选择题
A piston in a four-stroke cycle diesel engine makes four strokes during each （）.

A.crankshaft revolution
B.mechanical cycle of operation
C.period of two combustion cycles
D.cycle of two events
相关试题