單項(xiàng)選擇題Vents are led from the engine to the head tank for the release of () from the cooling water.

A.air
B.heat
C.sludge
D.steam


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1.單項(xiàng)選擇題Vents are led from the engine to head tank () from the cooling water.

A.for the release of air
B.for the release of water
C.in order to the release of air
D.because the release of air

3.單項(xiàng)選擇題Valve overlap is the period during which ().

A.the inlet valve is open
B.the exhaust valve is open
C.both valves are closed
D.both valves are open

4.單項(xiàng)選擇題Valve gear knocks are more easily located while the engine ().

A.is running
B.stops
C.is repaired
D.lacks of oil

5.單項(xiàng)選擇題VIT means ()

A.variable injection timing
B.variable inlet tonnage
C.vertical incoming tonnage
D.vertical inlet tank