單項(xiàng)選擇題During repair,lubrication lines and orifices must be ().

A.taken away
B.engaged
C.connected
D.sealed off


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題During (), the starting air valves should be closed to prevent the engine from turning.

A.overhaul
B.running
C.blowing down
D.All of the above are correct

4.單項(xiàng)選擇題Dirty oil must be () before being used again.

A.mixed with clean oil
B.purified
C.heated
D.strained

5.單項(xiàng)選擇題Dirt in the fuel oil system of a diesel engine can cause ().

A.clogged filters
B.poor combustion
C.overloading of the diesel
D.shock of fuel lines