NATE HEAT PUMP [2026] UPDATED ACTUAL Exam |
Question and Answer | A+ VERIFIED ANSWERS
• The primary purpose of using flux when soldering copper or brass parts
is... -✓✓ To prevent oxidation
• The water that results from a defrost cycle of an air to air heat
pump(runoff) must... -✓✓ Drain off and away fro the outdoor coil to prevent
excessive ice build up on the bottom of the coil and reduce capacity
• The component used to reduce sound transmission and prevent water
leaks of a packaged heat pump installed on a roof is... -✓✓ Curb Gasket
• On some installations, a heat pump indoor coil can be installed on an
existing, operable, fossil fuel furnace. When this type of installation is done,
you need to add a control so that... -✓✓ The furnace and heat pump do not
operate at the same time in normal heating
• When under a deep vacuum, a hermetic refrigeration compressor's motor
windings could be... -✓✓ Damaged if energized
• In order for an evacuation to be considered complete... -✓✓ A heat pump
refrigeration circuit should be evacuated to a vacuum pressure of 500
microns or below
• A system is supplied from the factory with charge for a 15 FOOT
LINESET. The data plate shows the required system charge to be 5
POUNDS 10 OUNCES. The lineset uses 3/8 inch liquid line and is 25
FEET LONG. The manufacturers instruction sheet specifies 0.6 ounces of
refrigerant to be added for each added foot of refrigerant line length so... -
✓✓ The total refrigerant charge for the system would be 6 pounds
• Drive slips are typically installed on the... -✓✓ Shorter sides of rectangular
duct
• To properly set a heat anticipator, it is necessary to... -✓✓ Check the
heating control circuit amperage draw.
, • A heat pump operating in normal ice free conditions maintains a certain
temperature difference between the outdoor coil temperature and the
surrounding outdoor ambient... -✓✓ This temperature difference is referred
to as coil TD
• The smallest refrigerant leak that an electronic leak detector should be
capable of sensing is... -✓✓ 1/2 an ounce a year
• When checking the pressures in an operating system with a manifold
gauge set... -✓✓ Refrigerant oil in a hose will have no effect on the gauge
reading
• At sea level, a gauge pressure of 35 psig is equal to an... -✓✓ Absolute
pressure of 49,7 psia
• A technician measures the return air temperature of a 100,000 Btu output
furnace to be 65F and the supply side air temperature is 135F... -✓✓ The
CFM should be 1323
• A residential supply diffuser that is noisy because of a loose vane is best
serviced by... -✓✓ Replacing the diffuser
• When performing preventive maintenance on a heat pump the technician
should check the outdoor fan to be certain that the... -✓✓ Fan runs freely
with no binding
• What is the effect of 170 volts supplied to a 208/230 volt compressor... -
✓✓ Would cause a current increase and the motor may trip on overload
• On a service call for a cooling problem with a heat pump, your inspections
find a liquid line that has condensation on it... -✓✓ The most likely cause
would be the liquid line is restricted
• A reason for cool air complaints when a heat pump is operating in the
heating cycle... -✓✓ Excessive supply air velocities
Question and Answer | A+ VERIFIED ANSWERS
• The primary purpose of using flux when soldering copper or brass parts
is... -✓✓ To prevent oxidation
• The water that results from a defrost cycle of an air to air heat
pump(runoff) must... -✓✓ Drain off and away fro the outdoor coil to prevent
excessive ice build up on the bottom of the coil and reduce capacity
• The component used to reduce sound transmission and prevent water
leaks of a packaged heat pump installed on a roof is... -✓✓ Curb Gasket
• On some installations, a heat pump indoor coil can be installed on an
existing, operable, fossil fuel furnace. When this type of installation is done,
you need to add a control so that... -✓✓ The furnace and heat pump do not
operate at the same time in normal heating
• When under a deep vacuum, a hermetic refrigeration compressor's motor
windings could be... -✓✓ Damaged if energized
• In order for an evacuation to be considered complete... -✓✓ A heat pump
refrigeration circuit should be evacuated to a vacuum pressure of 500
microns or below
• A system is supplied from the factory with charge for a 15 FOOT
LINESET. The data plate shows the required system charge to be 5
POUNDS 10 OUNCES. The lineset uses 3/8 inch liquid line and is 25
FEET LONG. The manufacturers instruction sheet specifies 0.6 ounces of
refrigerant to be added for each added foot of refrigerant line length so... -
✓✓ The total refrigerant charge for the system would be 6 pounds
• Drive slips are typically installed on the... -✓✓ Shorter sides of rectangular
duct
• To properly set a heat anticipator, it is necessary to... -✓✓ Check the
heating control circuit amperage draw.
, • A heat pump operating in normal ice free conditions maintains a certain
temperature difference between the outdoor coil temperature and the
surrounding outdoor ambient... -✓✓ This temperature difference is referred
to as coil TD
• The smallest refrigerant leak that an electronic leak detector should be
capable of sensing is... -✓✓ 1/2 an ounce a year
• When checking the pressures in an operating system with a manifold
gauge set... -✓✓ Refrigerant oil in a hose will have no effect on the gauge
reading
• At sea level, a gauge pressure of 35 psig is equal to an... -✓✓ Absolute
pressure of 49,7 psia
• A technician measures the return air temperature of a 100,000 Btu output
furnace to be 65F and the supply side air temperature is 135F... -✓✓ The
CFM should be 1323
• A residential supply diffuser that is noisy because of a loose vane is best
serviced by... -✓✓ Replacing the diffuser
• When performing preventive maintenance on a heat pump the technician
should check the outdoor fan to be certain that the... -✓✓ Fan runs freely
with no binding
• What is the effect of 170 volts supplied to a 208/230 volt compressor... -
✓✓ Would cause a current increase and the motor may trip on overload
• On a service call for a cooling problem with a heat pump, your inspections
find a liquid line that has condensation on it... -✓✓ The most likely cause
would be the liquid line is restricted
• A reason for cool air complaints when a heat pump is operating in the
heating cycle... -✓✓ Excessive supply air velocities
