CAPSTONE PREP ESCO LIGHT COMMERCIAL REFRIGERATION QUESTIONS

CAPSTONE PREP ESCO LIGHT COMMERCIAL REFRIGERATION QUESTIONS 1. In a dry type (direct expansion) evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: A. Operate at high-efficiency B. Ensure that Frost is not accumulate C. Subcool the compressor D. Ensure proper oil return - CORRECT ANSWER -A. Operate at high-efficiency 2. The difference between the temperature of the refrigerant boiling in the evaporator and the temperature at the evaporator outlet is known as A. Evaporator superheat B. Latent heat C. Evaporator sub-cooling D. Sublimation - CORRECT ANSWER -A. Evaporator superheat 3. An expansion device that is stuck open will cause A. Low suction pressure B. A starved evaporator C. Excessive superheat D. A flooded evaporator - CORRECT ANSWER -D. A flooded evaporator 4. When measuring evaporator superheat on a commercial system that has a long suction line, the pressure reading should be taken at the