Nate Heat Pump Pretest – Q’s And A’s
One advantage of a self-purging recovery machine is to ✔️Ans - 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 ✔️Ans - Curb gasket
Which condition is the most important consideration when installing metal
supply ductwork in an unconditioned crawlspace ✔️Ans - 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 ✔️Ans - 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 ✔️Ans - 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 ✔️Ans - 4 or 8 O'Clock
What is the maximum acceptable supply voltage tolerance for a 120 volt
circuit ✔️Ans - +/- 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
✔️Ans - Compressor and the second stage calls for auxiliary heat
A heat pump operates normally in first stage heating. The first stage bulbs
appear to be calling, the compressor continues to run, but the auxiliary
electric heat does not come on. What could be a likely source of the problem
✔️Ans - The second stage heating circuit us open
One advantage of a self-purging recovery machine is to ✔️Ans - 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 ✔️Ans - Curb gasket
Which condition is the most important consideration when installing metal
supply ductwork in an unconditioned crawlspace ✔️Ans - 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 ✔️Ans - 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 ✔️Ans - 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 ✔️Ans - 4 or 8 O'Clock
What is the maximum acceptable supply voltage tolerance for a 120 volt
circuit ✔️Ans - +/- 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
✔️Ans - Compressor and the second stage calls for auxiliary heat
A heat pump operates normally in first stage heating. The first stage bulbs
appear to be calling, the compressor continues to run, but the auxiliary
electric heat does not come on. What could be a likely source of the problem
✔️Ans - The second stage heating circuit us open
