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單項(xiàng)選擇題

Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant? （）
(1) too little cooling water
(2) too much cooling water
(3) too warm cooler water

A.（1）only
B.anyof（1），（2）and（3）
C.anyof（1）and（3）
D.anyof（1）and（2）

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單項(xiàng)選擇題

Which of the following may cause that the compressor cuts off on high pressure cutout in a refrigeration plant? （）
(1) faulty condensing
(2) too few refrigerant
(3) high discharge pressure

A.any of (1) and (3)
B.any of (1) and (2)
C.any of (2) and (3)
D.any of (1), (2) and (3)

單項(xiàng)選擇題

The device used for low-pressure control and high-pressure cutout on a compressor is called （）.

A.cutout
B.controller switch
C.pressure controller
D.cutout switch

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