Esco Heat pump exam

Esco Heat pump exam 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); - correct answersC: reversing valve. 2. What is the difference between "demand defrost" and "timed defrost?" - correct answersD: 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; - correct answersC: 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; - correct answersA: initial balance point. 5. At what temperature is an outdoor ambient thermostat normally set? - correct answersB: 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: - correct answersD: outdoor fan is inoperative 7. In order to determine a heat pumps' balance po