HVAC NATE HEAT PUMP 171 2026 ACTUAL
PAPER FULL QUESTIONS AND ANSWERS 100
PERCENT CORRECT
◉ Drive slips are typically installed on the __________ sides of
rectangular ducts. Answer: Shorter
◉ To properly set a heat anticipator it is necessary to check the.
Answer: 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. Answer: Coil TD
(temperature difference)
◉ The smallest refrigerant leak that an electronic leak detector
should be capable of sensing is. Answer: 0.05 oz. per year
◉ When checking the pressures in an operating system with a
manifold gauge set, refrigerant oil in a hose will have ___ ______ on the
gauge reading. Answer: No effect
, ◉ At sea level, a gauge pressure of 35 psig is equal to an absolute
pressure of. Answer: 49.7 psia
◉ 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. The CFM would be. Answer: 1323 (TD= 135-
65=70 100,000/TDx1.08 100,000/75.6=1323)
◉ A residential supply diffuser that is noisy because of a loose vane
is best serviced by. Answer: Replacing the diffuser
◉ When performing preventive maintenance on a heat pump the
technician should check the outdoor fan to be certain that the fan.
Answer: runs freely with no binding
◉ What is the effect of 170 volts supplied to a 208/230 volt
compressor would cause a current. Answer: 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. Answer: liquid line is restricted
◉ A reason for cool air complaints when a heat pump is operating in
the heating cycle is. Answer: excessive supply air velocities
PAPER FULL QUESTIONS AND ANSWERS 100
PERCENT CORRECT
◉ Drive slips are typically installed on the __________ sides of
rectangular ducts. Answer: Shorter
◉ To properly set a heat anticipator it is necessary to check the.
Answer: 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. Answer: Coil TD
(temperature difference)
◉ The smallest refrigerant leak that an electronic leak detector
should be capable of sensing is. Answer: 0.05 oz. per year
◉ When checking the pressures in an operating system with a
manifold gauge set, refrigerant oil in a hose will have ___ ______ on the
gauge reading. Answer: No effect
, ◉ At sea level, a gauge pressure of 35 psig is equal to an absolute
pressure of. Answer: 49.7 psia
◉ 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. The CFM would be. Answer: 1323 (TD= 135-
65=70 100,000/TDx1.08 100,000/75.6=1323)
◉ A residential supply diffuser that is noisy because of a loose vane
is best serviced by. Answer: Replacing the diffuser
◉ When performing preventive maintenance on a heat pump the
technician should check the outdoor fan to be certain that the fan.
Answer: runs freely with no binding
◉ What is the effect of 170 volts supplied to a 208/230 volt
compressor would cause a current. Answer: 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. Answer: liquid line is restricted
◉ A reason for cool air complaints when a heat pump is operating in
the heating cycle is. Answer: excessive supply air velocities
