NATE Heat Pump Pretest Exam and
Answers
One advantage of a self-purging recovery machine is to - ✔✔Purge itselfof most refrigerant
after use
The component used to reduce sound transmission and prevent water leaks of a packaged heat
pump installed on a roof is the - ✔✔Curb gasket
Which condition is the most important consideration when installing metal supply ductwork in
an unconditioned crawlspace - ✔✔Insulate the ductwork and wrap with a vapor barrier
Air that remains in the refrigerant circuit of a heat pump because of a poor evacuation will
cause - ✔✔High condensing pressures with loss of capacity
A packaged heat pump in a two story installation is to be located at ground level with ductwork
running up the outside wall to a chase in the second floor. What precautions need to be taken
with the outside ductwork - ✔✔It must be insulated and weather proofed
To more accurately sense the temperature of horizontal suction lines that are 1 and an 1 ⅛ inch
or larger, TEV sensing bulb should be mounted at which of the following positions - ✔✔4 or 8
O'Clock
What is the maximum acceptable supply voltage tolerance for a 120 volt circuit - ✔✔+/- 10%
When checking that a heat pump thermostat is operating properly in heating, the tech should
confirm that the thermostat's first stage switches on the - ✔✔Compressor and the second stage
calls for auxiliary heat
Answers
One advantage of a self-purging recovery machine is to - ✔✔Purge itselfof most refrigerant
after use
The component used to reduce sound transmission and prevent water leaks of a packaged heat
pump installed on a roof is the - ✔✔Curb gasket
Which condition is the most important consideration when installing metal supply ductwork in
an unconditioned crawlspace - ✔✔Insulate the ductwork and wrap with a vapor barrier
Air that remains in the refrigerant circuit of a heat pump because of a poor evacuation will
cause - ✔✔High condensing pressures with loss of capacity
A packaged heat pump in a two story installation is to be located at ground level with ductwork
running up the outside wall to a chase in the second floor. What precautions need to be taken
with the outside ductwork - ✔✔It must be insulated and weather proofed
To more accurately sense the temperature of horizontal suction lines that are 1 and an 1 ⅛ inch
or larger, TEV sensing bulb should be mounted at which of the following positions - ✔✔4 or 8
O'Clock
What is the maximum acceptable supply voltage tolerance for a 120 volt circuit - ✔✔+/- 10%
When checking that a heat pump thermostat is operating properly in heating, the tech should
confirm that the thermostat's first stage switches on the - ✔✔Compressor and the second stage
calls for auxiliary heat
