Which work practice should be followed to best prevent the ingestion of chemicals? A) Schedule tasks during peak exposure periods
B) Do not eat or drink in regulated areas
C) Use air and ventilations systems
D) Wear hearing protections

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0