单项选择题
An increase in the heat load to a refrigeration system will cause （）.
A.the suction pressure to decrease B.the suction temperature to increase C.increased ice formation on the evaporator coil D.excessive short cycling of the compressor
单项选择题 Which of the following types of hydraulic pumps would be used in a steering system?（）
单项选择题 Which of the following statements is true concerning centrifugal pumps?（）
单项选择题 The temperature of the refrigerant in the evaporator coil depends mostly upon the （）.
