NATE Exam Air Conditioning and Heat Pumps Questions and Complete Solutions Graded A+
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Course
Nate commercial
Institution
Nate Commercial
a. Air movement
b. Humidity
c. Temperature
d. All of the above - Answer: 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...
NATE Exam Air
Conditioning and Heat
Pumps Questions and
Complete Solutions
Graded A+
Denning [Date] [Course title]
,Which of the following factors affects a customer's level of comfort?
a. Air movement
b. Humidity
c. Temperature
d. All of the above - Answer: 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% - Answer: 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% - Answer: 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% - Answer: 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 - Answer: b (3.2 kWh)
The three processes that transfer heat energy are conduction, convection, and ____.
a. concentration
b. radiation
c. refraction
d. static pressure - Answer: 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 - Answer: b (conduction)
What effect does raising the pressure in a sealed system have on refrigerant?
a. It becomes more difficult to subcool the liquid refrigerant
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