Esco Heat pump exam Questions And Answers | 100% Correct Answers | 2024 Updated Quiz

1. An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has a (an); - Answer-C: reversing valve. 2. What is the difference between "demand defrost" and "timed defrost?" - Answer-D: demand defrost only happens when needed, and time defrost is on timed temperature 3. The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called the; - Answer-C: outdoor ambient thermostat. 4. The outdoor temperature at which the heat pump provides the same amount of heat as the heat loss of the conditioned space without auxiliary heat is known as the; - Answer-A: initial balance point. 5. At what temperature is an outdoor ambient thermostat normally set? - Answer-B: At or slightly above the initial balance point. 6. The outdoor coil is frozen solid on a "no heat" service call. The most likely reason is: - Answer-D: outdoor fan is inoperative 7. In order to determine a heat pumps' balance point, you must first calculate; - Answer-A: the building's heat load. 8. Heat pumps are sized to handle the; - Answer-A: cooling load. 9. a high efficiency heat pump system designed to function from high or low ambient conditions below 10F may have; - Answer-C: auxiliary heat exchanger injected with a ethylene glycol solution. 10. Room thermostats for heat pumps should be installed; - Answer-B: as near to the main return air grill as possible.11. When the heat pump compressor has malfunetioned, the cus tomer has the option to switch the system into; - Answer-B: emergency heat mode. 12. Start-up with a night set back digital thermostat requires the technician to always; - Answer-D: teach the customer to program the thermostat. 13. The heat pump defrost board can be manipulated by the technician to; - Answer-C: simulate the defrost cycle. 14. The air-to-air heat pump outdoor unit is most efficient if located; - Answer-C: in a moderate climate zone. 15. Which of the following are innovations that may be found on new high efficiency units? - Answer-D. ECM motors 16. How may a lockout (impedance) relay be reset? - Answer-C: Simply disconnect power to the unit momentarily. 17. The temperature difference between the 1t and 2od bulbs for heating on a heat pump thermostat is; - Answer-C: approximately 2°F 18. SEER calculated by: - Answer-B. BTUs removed by the watts consumed during the cooling season 19. if the indoor fan is operated at an excessive speed in the coolin mode? - Answer-A: the system will not properly remove the humidity from the conditioned space. 20. The most preferred method of charging any system in the field is; - Answer-C: by weight. 21. What is the industry standard for deep vacuum? - Answer-C: Maintain 500 microns for 15 minutes. 22. Good service practice for installation of a reversing valve includes; - Answer-D. use heat paste and wet rags while brazing in the new valve