單項(xiàng)選擇題

A knocking sound emitted from an unloaded air compressor is probably caused by （）.

A.damaged intake valves
B.excessively tight mounting bolts
C.insufficient cylinder lubrication
D.a loose piston

你可能感興趣的試題

The refrigeration system low pressure cutout switch is actuated by （）.

A.an electric system manager
B.a sensing bulb at the tail coil of the evaporator
C.pressure changes in the suction line
D.failure of the king solenoid valve

單項(xiàng)選擇題

Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and （）.

A.fluid friction
B.fluid turbulence
C.component misalignment
D.pressure surges

无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

A knocking sound emitted from an unloaded air compressor is probably caused by （）.

你可能感興趣的試題

The refrigeration system low pressure cutout switch is actuated by （）.

Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and （）.