1
NATE Heat
NATE Heat Pump Test Guide 100%
Verified Questions & Answers | Grade A |
Latest 2026/2027
1. What can cause a lower than normal suction pressure: A restricted drier
2. What is a primary consideration when bending soft copper tubing into a
bend of any radius?: The cross-sectional are of the tube must not be
significantly reduced
3. When is vapor line condensation of a residential heat pump in the cooling
mode a concern?: Routing refrigerant line within a wall
4. Bent vanes on a direct drive blower wheel in an air handler can cause:: Loss
in airflow, excessive blower motor wear, and increased noise
5. A technician measures the return air temperature of a 100,000 Btu output
furnace to be 65 F and the supply side air temperature is 135 F. What is the
SCFM (standard CFM)?: 1323 SCFM
NATE Heat
,6. What would cause a voltage reading across a closed contact in a 24V control
circuit?: Pitted or dirty contacts
7. A reason for cool air complaints when a heat pump is operating in the
heating cycle is:: Excessive supply air velocitie
8. The purpose of performing a duct traverse is to determine the average
duct:: Airflow using multiple CFM readings taken from several locations
across the cross section of the duct. 17 When fabricating ductboard for a
horizontal duct 36" X 24", which of the following is a preferred method for
preventing wall deflection?: Use 12 gauge rods, both horizontally and
vertically at a minimum of every 16"
18. What is used to measure duct static pressure?: Differential pressure
gauge
19. To more accurately sense the refrigerant temperature of horizontal
suction line that are 1 1⁄2 or lager, a thermostatic expansion valve sensing
bulb should be mounted at which positions?: 4 or 8 o'clock
20. What are the first two checks typically made on an electronic control?:
Presence of proper input signals and proper output voltages
, 21. The technician suspects that an outdoor thermostat used to bring on
auxiliary heat may be out of calibration. The thermostat is a close-on-fall
type that is adjustable. One method for checking the thermostats
calibration is to:: Manually
rotate the shaft until the thermostat closes and compare the dial setting to an
accurate outdoor temperature reading plus 10 F
22. In an economizer system, when the outdoor air enthalpy exceeds
setpoint, the outdoor air enthalpy exceeds setpoint, the outdoor air
damper: Closes to a preset minimum position
23. What effect does a low charge have on the switchover operation of a
reversing valve?: Reversing valves are less likely to shift if charges is very low
24. What is an effective method for reducing the transmissions from an air
handler installed in a closet?: Place the cabinet on an isolation pad
25. A technician finds a compressor contactor energized, but the compressor
is not running. To troubleshoot, the technician should check for proper.:
Voltage to the load
NATE Heat
NATE Heat Pump Test Guide 100%
Verified Questions & Answers | Grade A |
Latest 2026/2027
1. What can cause a lower than normal suction pressure: A restricted drier
2. What is a primary consideration when bending soft copper tubing into a
bend of any radius?: The cross-sectional are of the tube must not be
significantly reduced
3. When is vapor line condensation of a residential heat pump in the cooling
mode a concern?: Routing refrigerant line within a wall
4. Bent vanes on a direct drive blower wheel in an air handler can cause:: Loss
in airflow, excessive blower motor wear, and increased noise
5. A technician measures the return air temperature of a 100,000 Btu output
furnace to be 65 F and the supply side air temperature is 135 F. What is the
SCFM (standard CFM)?: 1323 SCFM
NATE Heat
,6. What would cause a voltage reading across a closed contact in a 24V control
circuit?: Pitted or dirty contacts
7. A reason for cool air complaints when a heat pump is operating in the
heating cycle is:: Excessive supply air velocitie
8. The purpose of performing a duct traverse is to determine the average
duct:: Airflow using multiple CFM readings taken from several locations
across the cross section of the duct. 17 When fabricating ductboard for a
horizontal duct 36" X 24", which of the following is a preferred method for
preventing wall deflection?: Use 12 gauge rods, both horizontally and
vertically at a minimum of every 16"
18. What is used to measure duct static pressure?: Differential pressure
gauge
19. To more accurately sense the refrigerant temperature of horizontal
suction line that are 1 1⁄2 or lager, a thermostatic expansion valve sensing
bulb should be mounted at which positions?: 4 or 8 o'clock
20. What are the first two checks typically made on an electronic control?:
Presence of proper input signals and proper output voltages
, 21. The technician suspects that an outdoor thermostat used to bring on
auxiliary heat may be out of calibration. The thermostat is a close-on-fall
type that is adjustable. One method for checking the thermostats
calibration is to:: Manually
rotate the shaft until the thermostat closes and compare the dial setting to an
accurate outdoor temperature reading plus 10 F
22. In an economizer system, when the outdoor air enthalpy exceeds
setpoint, the outdoor air enthalpy exceeds setpoint, the outdoor air
damper: Closes to a preset minimum position
23. What effect does a low charge have on the switchover operation of a
reversing valve?: Reversing valves are less likely to shift if charges is very low
24. What is an effective method for reducing the transmissions from an air
handler installed in a closet?: Place the cabinet on an isolation pad
25. A technician finds a compressor contactor energized, but the compressor
is not running. To troubleshoot, the technician should check for proper.:
Voltage to the load
