Nate Ac Service Certification Exam With 100% Correct Answers 2023

What effect does overcharging have on subcooling? A. It depends on which type of refrigerant is used B. It increases it C. It decreases it D. It depends on the metering device used {Ans: *D It depends on the metering device used}Which of the following substances could create an extremely dangerous condition if used to check refrigeration system for leaks? A. R-22 B. Nitrogen C. Oxygen D. Carbon Dioxide {Ans: D. Carbon Dioxide}How should a mercury bulb thermostat be disposed of? A. Return to the original equipment manufacturer B. Return to approved recycling facility C. Return to homeowner D. Dispose in a sealed container {Ans: B. Return to approved recycling facility}Hard start kits are typically required on: A. systems with reciprocating compressors and thermostatic expansion valve metering devices. B. systems with reciprocating compressors and fixed orifice metering. C. any system where a crankcase heater is used. D. any system where a crankcase heater is not used. {Ans: *A}Thermostatic expansion valves meter refrigerant flow to a coil to maintain: A. superheated refrigerant leaving the coil. B. subcooled refrigerant leaving the coil. C. constant pressure in the coil. D. constant temperature in the coil. {Ans: A. superheated