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NATE Heat Pump Practice Test Exam Questions And
Correct Answers Rated 100%
A step down transformer has a rating of 40 VA. Its primary voltage is 120V with a
secondary voltage of 24V. This transformer must not be connected to a load above
a maximum current draw of... - ANSWER -1.7 amps
A bright red or orange glow from the resistance element in an duct heater... -
ANSWER - Indicates that the flow of air is insufficient
The outdoor fan on a heat pump stops during... - ANSWER -Defrost to minimize
defrost time
A capacitor start-capacitor run (CSCR) motor has and open run capacitor so it may
start... - ANSWER -But it draws a higher than normal running current
Bent vanes on a direct drive blower wheel in an air handler can cause... -
ANSWER -Loss in airflow, excessive motor wear, and Increased noise
A split system heat pump is using thermostatic expansion valves. The system
performs properly in heating but in cooling the compressor pumps down... -
ANSWER -Which could mean the
main power element of the indoor expansion valve has lost its charge
Conditions that can cause a reduction from design capacity in a heat pump are an...
- ANSWER -Undersized vapor line
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A symptom that a technician would expect on a heat pump system in the cooling
mode if the check valve is leaking internally is... - ANSWER Flooding of the
indoor coil
A voltage reading across a closed contact in a
24V control circuit indicates... - ANSWER Pitted or dirty contacts
The first two checks typically made on an electronic check are... - ANSWER -
Presence of proper input signals and proper output signals In a low voltage circuit,
a corroded wiretoterminal connection acts in the circuit like... - ANSWER -An
additional resistor
The continuity of a fuse should be tested by... - ANSWER -Checking resistance
with the power off
The first check made for most electrical troubleshooting is... - ANSWER -Voltage
check of the supply line
To properly check an energized compressor circuit... - ANSWER -The technician
should use a VOM set for volts
The following conditions exist in a circuit that supplies power to three parallel
loads
-One load is resistive
-One load is capacitive
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-One load is inductive - ANSWER -The total current in the circuit when operating
will be the sum of the currents through each load
The technician is using an analog multimeter to check a run capacitor. With the
meter set to ohms, the needle swings toward zero and then slowly rises toward
infinity... - ANSWER -This tells the technician that the capacitor charges and
discharges
If the technician believes that a hermetic compressor has a permanently open
internal protector... - ANSWER -The technician should test the compressor while
it is cool
A control string is defined as two or more switch contacts connected in a circuit, or
set of circuits, to control a load. In order to troubleshoot a load controlled by a
control string... - ANSWER -The technician must first check for proper voltage
applied across the load
The technician suspects that an outdoor thermostat used to bring on auxiliary heat
may out of calibration. The thermostat is a CLOSE ON FALL type that is
adjustable. One method for checking the thermostat calibration is to... - ANSWER
-Manually rotate the shaft until the thermostat until the thermostat closes and then
compare the dial setting to an accurate outdoor temp. reading plus 10F
When changing out the evaporator coil the installer mjust be certain to... -
ANSWER Plumb the cabinet so its sides are vertical The recommended
maximum external static pressure used for heating and cooling equipment with
blowers for 5 ton of cooling or less is... -
ANSWER -0.1 inWC
NATE Heat Pump Practice Test Exam Questions And
Correct Answers Rated 100%
A step down transformer has a rating of 40 VA. Its primary voltage is 120V with a
secondary voltage of 24V. This transformer must not be connected to a load above
a maximum current draw of... - ANSWER -1.7 amps
A bright red or orange glow from the resistance element in an duct heater... -
ANSWER - Indicates that the flow of air is insufficient
The outdoor fan on a heat pump stops during... - ANSWER -Defrost to minimize
defrost time
A capacitor start-capacitor run (CSCR) motor has and open run capacitor so it may
start... - ANSWER -But it draws a higher than normal running current
Bent vanes on a direct drive blower wheel in an air handler can cause... -
ANSWER -Loss in airflow, excessive motor wear, and Increased noise
A split system heat pump is using thermostatic expansion valves. The system
performs properly in heating but in cooling the compressor pumps down... -
ANSWER -Which could mean the
main power element of the indoor expansion valve has lost its charge
Conditions that can cause a reduction from design capacity in a heat pump are an...
- ANSWER -Undersized vapor line
,2 | Page
A symptom that a technician would expect on a heat pump system in the cooling
mode if the check valve is leaking internally is... - ANSWER Flooding of the
indoor coil
A voltage reading across a closed contact in a
24V control circuit indicates... - ANSWER Pitted or dirty contacts
The first two checks typically made on an electronic check are... - ANSWER -
Presence of proper input signals and proper output signals In a low voltage circuit,
a corroded wiretoterminal connection acts in the circuit like... - ANSWER -An
additional resistor
The continuity of a fuse should be tested by... - ANSWER -Checking resistance
with the power off
The first check made for most electrical troubleshooting is... - ANSWER -Voltage
check of the supply line
To properly check an energized compressor circuit... - ANSWER -The technician
should use a VOM set for volts
The following conditions exist in a circuit that supplies power to three parallel
loads
-One load is resistive
-One load is capacitive
, 3 | Page
-One load is inductive - ANSWER -The total current in the circuit when operating
will be the sum of the currents through each load
The technician is using an analog multimeter to check a run capacitor. With the
meter set to ohms, the needle swings toward zero and then slowly rises toward
infinity... - ANSWER -This tells the technician that the capacitor charges and
discharges
If the technician believes that a hermetic compressor has a permanently open
internal protector... - ANSWER -The technician should test the compressor while
it is cool
A control string is defined as two or more switch contacts connected in a circuit, or
set of circuits, to control a load. In order to troubleshoot a load controlled by a
control string... - ANSWER -The technician must first check for proper voltage
applied across the load
The technician suspects that an outdoor thermostat used to bring on auxiliary heat
may out of calibration. The thermostat is a CLOSE ON FALL type that is
adjustable. One method for checking the thermostat calibration is to... - ANSWER
-Manually rotate the shaft until the thermostat until the thermostat closes and then
compare the dial setting to an accurate outdoor temp. reading plus 10F
When changing out the evaporator coil the installer mjust be certain to... -
ANSWER Plumb the cabinet so its sides are vertical The recommended
maximum external static pressure used for heating and cooling equipment with
blowers for 5 ton of cooling or less is... -
ANSWER -0.1 inWC
