單項選擇題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


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2.單項選擇題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

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

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

4.單項選擇題VIT means ()

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

5.單項選擇題Under manoeuvring condition the main engine may run on ().

A.gas oil
B.marine diesel oil
C.residue oil
D.crude oil