NATE HEAT PUMP ACTUAL EXAM with most tested
questions and correct detailed answers
already graded A+ assured pass latest version 2025
A condition that can cause a reduction from design capacity in a heat
pump is --- correct answer ---an undersized vapor line
Flash gas in the liquid line of any heat pump must be avoided. Liquid
line flash gas can be caused by --- correct answer ---excessive liquid
line length or lift
A symptom that a technician would expect on a heat pump system in
the cooling mode if the check valve is leaking internally is a --- correct
answer ---flooding of the indoor coil
A voltage reading across a closed contact in a 24V control circuit ---
correct answer ---indicates pitted or dirty contacts
The first two checks typically made on an electronic control are ---
correct answer ---presence of proper input signals and proper output
voltages
In a low voltage circuit, a corroded wire-to-terminal connection acts
in the circuit like an --- correct answer ---additional resistor
,The continuity of a fuse should be tested by checking resistance with -
-- correct answer ---power off
The first check made for most electrical troubleshooting is a ---
correct answer ---voltage check of the supply line
To properly check an energized compressor circuit the technician
should use a --- correct answer ---VOM set for volts
The following conditions exist in a circuit that supplies power to three
parallel loads. --- correct answer ---One load is resistive
One load is capacitive
One load is inductive
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, this tells the technician that the capacitor
--- correct answer ---charges and discharges
If the technician believes that a hermetic compressor has a
permanently open internal overload protector, the technician should --
- correct answer ---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, the technician must
first check --- correct answer ---for proper voltage applied across the
load
When changing out an evaporator coil the installer must be certain to
--- correct 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 ---
correct answer ---0.1 in W.C
When a balancing check of a newly installed duct system the dampers
should be --- correct answer ---open completely in all rooms
Operating sound is a consideration in the location of a condensing unit
because --- correct answer ---excessive noise could be disruptive to
the customer
A technician has determined a supply in a flexible duct system is
leaking so --- correct answer ---All connections including inner and
outer layers should be checked
Sensible heat ratio is --- correct answer ---sensible removed ÷ total
heat removed
questions and correct detailed answers
already graded A+ assured pass latest version 2025
A condition that can cause a reduction from design capacity in a heat
pump is --- correct answer ---an undersized vapor line
Flash gas in the liquid line of any heat pump must be avoided. Liquid
line flash gas can be caused by --- correct answer ---excessive liquid
line length or lift
A symptom that a technician would expect on a heat pump system in
the cooling mode if the check valve is leaking internally is a --- correct
answer ---flooding of the indoor coil
A voltage reading across a closed contact in a 24V control circuit ---
correct answer ---indicates pitted or dirty contacts
The first two checks typically made on an electronic control are ---
correct answer ---presence of proper input signals and proper output
voltages
In a low voltage circuit, a corroded wire-to-terminal connection acts
in the circuit like an --- correct answer ---additional resistor
,The continuity of a fuse should be tested by checking resistance with -
-- correct answer ---power off
The first check made for most electrical troubleshooting is a ---
correct answer ---voltage check of the supply line
To properly check an energized compressor circuit the technician
should use a --- correct answer ---VOM set for volts
The following conditions exist in a circuit that supplies power to three
parallel loads. --- correct answer ---One load is resistive
One load is capacitive
One load is inductive
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, this tells the technician that the capacitor
--- correct answer ---charges and discharges
If the technician believes that a hermetic compressor has a
permanently open internal overload protector, the technician should --
- correct answer ---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, the technician must
first check --- correct answer ---for proper voltage applied across the
load
When changing out an evaporator coil the installer must be certain to
--- correct 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 ---
correct answer ---0.1 in W.C
When a balancing check of a newly installed duct system the dampers
should be --- correct answer ---open completely in all rooms
Operating sound is a consideration in the location of a condensing unit
because --- correct answer ---excessive noise could be disruptive to
the customer
A technician has determined a supply in a flexible duct system is
leaking so --- correct answer ---All connections including inner and
outer layers should be checked
Sensible heat ratio is --- correct answer ---sensible removed ÷ total
heat removed
