NATE AC SERVICE CERTIFICATION
CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS
GRADED A+
◍ A technician has determined a supply in a flexible duct system is leaking.
What should be checked?.
Answer: All connections inner and outer layers.
◍ What can listening carefully to a customer help you with?.
Answer: Diagnose the problem
◍ Electronic air cleaners can operate with internal voltages as high as?.
Answer: 5000v
◍ Why do some electromechanical type thermostats require connections to
both the hot side and common side of the low voltage transfromer.
Answer: Display lights must be powered using both sides of the line
◍ Customers depend on you to be patient, loyal and?.
Answer: Honest
◍ Using a (BLANK) can cut hard or soft copper, leave no metal shavings to
contaminate the system and produce a clean, square cut..
Answer: Tube cutter
◍ In discussing human comfort, the temperature most commonly referred to
is?.
Answer: Dry-bulb
◍ A sling psychrometer uses two glass-stem thermometers. One measures
dry-bulb and the other measures?.
, Answer: Wet-bulb
◍ What agency regulates cylinders and chemicals transported in a service
vehicle?.
Answer: DOT
◍ Which of the following classifications of fire extinguishers should be used
for electrical fires?.
Answer: Class C
◍ When using a ladder. you should always?.
Answer: Maintain three points of contact
◍ When does a ground fault circuit interrupter open an electrical circuit?.
Answer: When current travels through a ground path other than the normal
neutral
◍ the continuity reading on a functional fuse will be.
Answer: 0 ohms
◍ A natural cooling process produced by moisture on the skin changing to
low-pressure steam is called?.
Answer: Evaporation
◍ the technician believes that a hermetic compressor has a permanently openn
internal overload protectio the technician should test the compressor while it
is?.
Answer: cool
◍ outdoor condensing units that are installed in areas where flooding is
possible must.
Answer: be mounted above flood level
◍ During the heating season, human comfort can be enhanced without
changing the temperature of the air by?.
Answer: Adding moisture
◍ During the cooling season, dampers on bypass humidifiers should be?.
Answer: Completely closed
CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS
GRADED A+
◍ A technician has determined a supply in a flexible duct system is leaking.
What should be checked?.
Answer: All connections inner and outer layers.
◍ What can listening carefully to a customer help you with?.
Answer: Diagnose the problem
◍ Electronic air cleaners can operate with internal voltages as high as?.
Answer: 5000v
◍ Why do some electromechanical type thermostats require connections to
both the hot side and common side of the low voltage transfromer.
Answer: Display lights must be powered using both sides of the line
◍ Customers depend on you to be patient, loyal and?.
Answer: Honest
◍ Using a (BLANK) can cut hard or soft copper, leave no metal shavings to
contaminate the system and produce a clean, square cut..
Answer: Tube cutter
◍ In discussing human comfort, the temperature most commonly referred to
is?.
Answer: Dry-bulb
◍ A sling psychrometer uses two glass-stem thermometers. One measures
dry-bulb and the other measures?.
, Answer: Wet-bulb
◍ What agency regulates cylinders and chemicals transported in a service
vehicle?.
Answer: DOT
◍ Which of the following classifications of fire extinguishers should be used
for electrical fires?.
Answer: Class C
◍ When using a ladder. you should always?.
Answer: Maintain three points of contact
◍ When does a ground fault circuit interrupter open an electrical circuit?.
Answer: When current travels through a ground path other than the normal
neutral
◍ the continuity reading on a functional fuse will be.
Answer: 0 ohms
◍ A natural cooling process produced by moisture on the skin changing to
low-pressure steam is called?.
Answer: Evaporation
◍ the technician believes that a hermetic compressor has a permanently openn
internal overload protectio the technician should test the compressor while it
is?.
Answer: cool
◍ outdoor condensing units that are installed in areas where flooding is
possible must.
Answer: be mounted above flood level
◍ During the heating season, human comfort can be enhanced without
changing the temperature of the air by?.
Answer: Adding moisture
◍ During the cooling season, dampers on bypass humidifiers should be?.
Answer: Completely closed
