單項(xiàng)選擇題

Which of the following should be recorded in Oil Record Book Part I (machinery space operation) ?（）

A.Non automatic discharge overboard of machinery space bilge water
B.Automatic discharge overboard of machinery space bilge water
C.A and B
D.Neither A nor B

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單項(xiàng)選擇題

A ruptured diaphragm in a thermostatic expansion valve will cause the valve to （）.

A.open
B.close
C.remain in its position
D.flood the evaporator with refrigerant

單項(xiàng)選擇題

Black smoke coming from a boiler can be caused by （）.

A.low water level
B.low oil pressure
C.excessively high fuel pressure
D.an improper air/fuel ratio