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單項選擇題

When the direction handle of telegraph is moved, the relative position of camshaft and crankshaft will be（）

A.changed accordingly
B.unchanged
C.positioned ahead
D.positioned astern

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單項選擇題

Which one of the followings may not be checked before engine starting?（）

A.tank level
B.Various filters
C.Drains
D.seawater temperature

單項選擇題

The is employed to warm up a large diesel engine before its starting（）

A.hot air
B.hot boiler water
C.cylinder water
D.hot seawater

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