Cfesa Refrigeration Practice Test Guide

A compressor draws locked rotor amps immediately on start and trips the internal overload. The first step is: a) Replace the compressor b) Check for electrical short to ground c) Check for mechanical seizure d) Measure start capacitor microfarads Section 4: Commercial Refrigeration Specifics 10. In a multiple-evaporator supermarket rack system, oil return to the compressor is maintained by: a) Oil separators and timed oil return valves b) High hot gas pressure c) Continuous compressor operation d) Low superheat settings

The maximum allowable refrigerant leak rate per year for commercial refrigeration under EPA Section 608 (with 50+ lb charge) is: a) 15% b) 20% c) 25% d) 35% Section 5: Safety & Best Practices 13. When recovering refrigerant from a system with a burned-out compressor, you should: a) Recover into the same tank as good refrigerant b) Use a filter drier in the recovery line c) Vent the non-condensables to speed recovery d) Skip recovery if the system is under 5 lbs cfesa refrigeration practice test

A reach-in freezer with hot gas defrost has frost only on the last pass of the evaporator. This indicates: a) Undercharge of refrigerant b) Defrost termination failed open c) TXV stuck open d) Non-condensables in the system A compressor draws locked rotor amps immediately on