NATE A/C and Heat Pumps basics Exam with Questions and Answers

NATE A/C and Heat Pumps basics Exam with Questions and Answers What must be verified before you use performance charts or gauges to validate system operation? a. Refrigerant charge b. Correct air flow c. Check the voltage d. All the above - CORRECT ANSWER-b (Correct air flow) What type of component if installed will help protect the compressor from refrigerant slugging? a. driers b. heaters c. more refrigerant d. accumulator - CORRECT ANSWER-d (accumulator) What is used to maintain the correct superheat for a refrigeration system? a. more refrigerant b. TEV c. Check valves d. all the above - CORRECT ANSWER-b (TEV) A four way valve in a heat pump is also known as a __________. a. Reversing valve b. TEV c. heat pump d. check valve - CORRECT ANSWER-a (Reversing valve) If the vacuum reading rises to a value less than 2,500 microns and levels off at that point, the circuit has___________ a. reached a complete vacuum b. a leak c. no leaks but water vapors remains in the circuit. d. nitrogen still in the system - CORRECT ANSWER-c (no leaks but water vapors remains in the circuit.) If the vacuum reading rises above 2,500 microns and continue to rise, _________ exist