nate air conditioning and heat pumps exam questions 20222023 | consisting of 95 questions with verified answers from experts
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NATE Air Conditioning and Heat Pumps
Exam Question And Answers 2022/2023
1. 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)
2. 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%)
3. 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%)
4. 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%)
5. 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: b (3.2 kWh)
6. The three processes that transfer heat energy are conduction,
convection, and .
a. concentration
b. radiation
c. refraction
d. static pressure: b (radiation)
7. 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: b (conduction)
8. What effect does raising the pressure in a sealed system have on
refriger- ant?
a. It becomes more difficult to subcool the liquid refrigerant
b. It becomes more difficult to superheat the refrigerant vapor
c. The refrigerant's boiling point decreases
d. The refrigerant's boiling point increases: d (The refrigerant's boiling
point increases)
9. What is the primary danger to people near an accidental refrigerant
release or spill?
a. Blurred vision caused by the refrigerant vapor coming in contact with
the eyes
b. Changes in weather patterns caused by global warming
c. Damage to the food chain caused by decreased ozone levels in
the stratosphere
d. Suffocation caused by the heavier refrigerant displacing oxygen in the
air: d (Suffocation caused by the heavier refrigerant displacing oxygen
in the air)
10. The maximum temperature at
which refrigerant may be stored is °F when the container is no more
, than % full of liquid by volume.
a. 120°F, 60%
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