Fundamentals of Processing Technology (Multiple Choice) 20181026
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The main hazard of excessively low viscosity in refrigeration oil is . A. Oil leakage is easy to occur. B. Oil loss is too rapid. C. Air leakage increases. D. The amount of oil entering the system increases. Hint: The operating temperature of the refrigeration compressor is not high; the refrigerant oil serves both lubricating and cooling functions, so attention should be paid to the impact of viscosity on sealing performance.
B. Excessive oil loss C. Increased air leakage D. Increased amount of oil entering the system
C. Decreased volumetric efficiency of the compressor