NATE Air Conditioning and Heat Pump Practice Questions with Complete Solutions

NATE Air Conditioning and Heat Pump Practice Questions with Complete Solutions Which of the following factors affects a customers level of comfort? - Correct Answer All of the above A cooling load calculation estimates the sensible heat gain of the structure. The cooling-only system should be within _____% of this calculated value. - Correct Answer +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. - Correct Answer +25% The combined output of a heatpump and its auxiliary heat should not exceed the calculated heat loss of a home by more than ____%. - Correct Answer 15% What amount of auxiliary electronic 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? - Correct Answer 3.2 kWh The three processes that transfer heat energy are conduction, convection, and _________. - Correct Answer Radiation Heat transfer that occurs when substances of different temperatures are in contact with each other is called _______. - Correct Answer conduction What effect does raising the pressure in a sealed system have on refrigerant? - Correct Answer The boiling point increases What is the primary danger to people near an accidental refrigerant release or spill? - Correct Answer suffocation caused by the heavier refrigerant displacing oxygen in the air The maximum temperature at which refrigerant may be stored is ______ F when the container is no more than ____% full of liquid by volume.; - Correct Answer 125 F, 80%