NATE Air Conditioning and Heat Pumps Exam Questions with Verified Answers from Experts

NATE Air Conditioning and Heat Pumps Exam Questions with Verified Answers from Experts Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above -Ans d (All of the above: air movement, humidity, temperature) A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling-only system should be within ____% of this calculated value. a. ±10% b. +10% c. +15% d. +30% -Ans c (+15%) The maximum sensible cooling capacity of a heat pump should be within ____% of the calculated sensible heat gain of a structure with a large heating load. a. ±10% b. +15% c. -25% d. +25% -Ans d (+25%) The combined output of a heat pump and its auxiliary heat should not exceed the calculated heat loss of a home by more than ____%. a. 10% b. 15% c. 20% d. 25% -Ans b (15%) What amount of auxiliary electric heat is needed when the output of a heat pump on a design day equals 18,800 Btuh and the heat loss of a home is 29,700 Btuh? a. 2.1 kWh b. 3.2 kWh c. 5.0 kWh d. 10.9 kWh Note: 3,413 Btu/kW -Ans b (3.2 kWh) The three processes that transfer heat energy are conduction, convection, and ____. a. concentration b. radiation c. refraction d. static pressure -Ans b (radiation) Heat transfer that occurs when substances of different temperatures are in contact with each other is called ____. a. concentration b. conduction c. convection d. radiation -Ans b (conduction)