NATE AC TEST PREP |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
During an annual service check up, it is discovered that there is a moderate amount of
resistance on a "bellyband" crankcase heater. What does this condition indicate?
A. the crankcase heater will operate
B. the crankcase heater will not operate
C. the crankcase heater is open
D. the crankcase heater voltage must be increased for proper operation
CORRECT ANSWER
A. the crankcase heater will operate
Question 2
High superheat is a symptom of:
A. a system overcharge
B. a clogged air filter
C. a blower fan operating on a speed that is too low
D. an extremely high indoor temperature
CORRECT ANSWER
D. An extremely high indoor temperature
1
,Question 3
Electronic type leak detectors typically have a push-button or knob for setting a reference
refrigerant level. This feature is useful for:
A. adjusting the detector after installing a new battery
B. checking the factory calibration of the instrument
C. setting the detector for use in environments with ambient refrigerant vapor
D. adjusting the detector for the type of refrigerant to be checked
CORRECT ANSWER
C. Setting the detector for use in environments with ambient refrigerant vapor
Question 4
The continuity of a fuse should be tested by:
A. checking resistance with power off
B. checking resistance with power on
C. checking resistance from the load side of the fuse to ground
D. checking resistance from the supply side of the fuse to ground
CORRECT ANSWER
A. Checking resistance with power off
Question 5
When performing a preventive maintenance on an outdoor unit, check the wiring to be
certain:
A. no wires have broken or loosened
2
, B. all wires are connected to their proper terminal
C. all wire sizes are correct
D. the correct wire type has been used
CORRECT ANSWER
A. No wires have broken or loosened
Question 6
What is the effect of 170 volts supplied to a 208/230 volt compressor?
A. no effect; the motor will continue to run
B. current decreases and the motor runs cooler
C. current increases and the motor may trip on overload
D. current increases and the motor runs cooler
CORRECT ANSWER
C. Current increases and the motor may trip on overload
Question 7
To properly set the heat anticipator it is necessary to check the:
A. voltage rating of the heat relay
B. heating control circuit amperage draw
C. BTU output of the furnace
D. VA rating of the transformer
CORRECT ANSWER
B. Heating control circuit amperage draw
3
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
During an annual service check up, it is discovered that there is a moderate amount of
resistance on a "bellyband" crankcase heater. What does this condition indicate?
A. the crankcase heater will operate
B. the crankcase heater will not operate
C. the crankcase heater is open
D. the crankcase heater voltage must be increased for proper operation
CORRECT ANSWER
A. the crankcase heater will operate
Question 2
High superheat is a symptom of:
A. a system overcharge
B. a clogged air filter
C. a blower fan operating on a speed that is too low
D. an extremely high indoor temperature
CORRECT ANSWER
D. An extremely high indoor temperature
1
,Question 3
Electronic type leak detectors typically have a push-button or knob for setting a reference
refrigerant level. This feature is useful for:
A. adjusting the detector after installing a new battery
B. checking the factory calibration of the instrument
C. setting the detector for use in environments with ambient refrigerant vapor
D. adjusting the detector for the type of refrigerant to be checked
CORRECT ANSWER
C. Setting the detector for use in environments with ambient refrigerant vapor
Question 4
The continuity of a fuse should be tested by:
A. checking resistance with power off
B. checking resistance with power on
C. checking resistance from the load side of the fuse to ground
D. checking resistance from the supply side of the fuse to ground
CORRECT ANSWER
A. Checking resistance with power off
Question 5
When performing a preventive maintenance on an outdoor unit, check the wiring to be
certain:
A. no wires have broken or loosened
2
, B. all wires are connected to their proper terminal
C. all wire sizes are correct
D. the correct wire type has been used
CORRECT ANSWER
A. No wires have broken or loosened
Question 6
What is the effect of 170 volts supplied to a 208/230 volt compressor?
A. no effect; the motor will continue to run
B. current decreases and the motor runs cooler
C. current increases and the motor may trip on overload
D. current increases and the motor runs cooler
CORRECT ANSWER
C. Current increases and the motor may trip on overload
Question 7
To properly set the heat anticipator it is necessary to check the:
A. voltage rating of the heat relay
B. heating control circuit amperage draw
C. BTU output of the furnace
D. VA rating of the transformer
CORRECT ANSWER
B. Heating control circuit amperage draw
3
