制冷试题(B卷)（Refrigeration test (volume B)）.docVIP

制冷试题(B卷)（Refrigeration test (volume B)） Operation management system technical center equipment management department Refrigeration test (volume B) 1. Selection: 1. The function of compressor oil is (A) seal and silencing. A, lubrication B, cool C, sound insulation 2. Daily test of ammonia leakage in the refrigeration workshop, using (B) test paper or ammonia detection portable instrument. If the test paper is used for testing, the operator should have a clear understanding of how the test paper is used. A, PH B, phenolphthalein C, alcohol, 3. The main characteristic of frozen oil is (C). A, high temperature without solidification B, high temperature, not vaporization C. Low temperature and no solidification 4. The refrigerant vapor from the compressor is called (A). A, superheated steam Supercooled steam C. Saturated vapor 5. The actual work cycle of the compressor goes through four processes, which in turn are (B). A, inhale, exhaust, expand, compress B, inhale, compress, exhaust, expand C, inhale, expand, exhaust, compress 6. The driving mechanism of compressor refers to piston, connecting rod, crankshaft and (A) etc. A, coupling B. motor C, valve The refrigerant is (C) in the condenser. A, too cold B, overheating C, saturated 8. During the work of refrigeration equipment, the supply of evaporator should be the change of heat load Heat load increases the volume of fluid supply (A). A. Heat load decreases the supply of liquid B, the heat load increases the supply of fluid When the heat ammonia defrost, the pressure before entering the evaporator must not exceed (C). A, 3.0 Mpa B, 1.8 Mpa C, 0.8 Mpa 10. When the refrigerant is used, the distance from the open flame is generally not less than (C). A, 1 meter B, 3 m C, to 10 m The refrigerant in the evaporator is vaporized under (A). A, isothermal pressure B. Isothermal differential pressure C, isostatic pressure The air conditioner is cooled by condensation and the evaporator For (B). A, the process of increasing the