單項(xiàng)選擇題

When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.

A.increase the amount of cooling water to the condenser
B.decrease the amount of cooling water to the condenser
C.add more refrigerant to the system
D.remove some refrigerant from the system

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單項(xiàng)選擇題

Which of the following statements is correct concerning heat transfer?（）

A.Heat is given off from a high temperature region known as a heat sink
B.Heat transfer rate is affected most by the size of the heat sink involved
C.Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink
D.Heat transfer by radiation will occur only by mass motion of a fluid substance

單項(xiàng)選擇題

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）

A.Maritime Safety Administration
B.Master of the vessel
C.Chief Engineer
D.Chief Mate

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When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.

你可能感興趣的試題

Which of the following statements is correct concerning heat transfer?（）

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）