NATE HVAC SUPPORT TECHNICIAN
COMPREHENSIVE TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
●● What are the two different types of ducts? Answer: Rigid and
Flexible
●● Describe rigid ducts. Answer: made out of galvanized steel,
polyurethane, and fiberglass. Very durable
●● Location of rigid ducts? Answer: main trunk ductwork
●● Describe flexible ducts Answer: insulated outer jacket surrounded by
a plastic film-coil spring inner liner
●● location of flexible ducts? Answer: branches off of main ductwork.
can be found in crawl spaces and suspended for floor joists
●● supply and return duct requirments? Answer: adequate size, properly
sealed, and well insulated
●● what component does the outdoor coil act as on a heat pump?
Answer: evaporator
, ●● what component does the indoor coil act as on a heat pump? Answer:
condenser
●● describe what a compressor does? Answer: acts as a pump, circulates
refrigerant through tubing
●● what does the metering device do in a refrigeration circuit? Answer:
regulates flow of refrigerant to achieve desired refrigerant temperatures
●● list the different refrigerants that have been used in homes. Answer:
R-12, R-500, R-22, R-410A
●● why could a loose fan belt have an impact on air flow? Answer: It
could slip on its pulley, thereby slowing the fan speed and reducing air
flow.
●● Describe grilles Answer: coverings with small opening that allow air
to pass through them, while preventing large objects from entering
●● Describe location of supply register Answer: outer walls or under
windows
●● Describe location of return register Answer: up high on inside walls
COMPREHENSIVE TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
●● What are the two different types of ducts? Answer: Rigid and
Flexible
●● Describe rigid ducts. Answer: made out of galvanized steel,
polyurethane, and fiberglass. Very durable
●● Location of rigid ducts? Answer: main trunk ductwork
●● Describe flexible ducts Answer: insulated outer jacket surrounded by
a plastic film-coil spring inner liner
●● location of flexible ducts? Answer: branches off of main ductwork.
can be found in crawl spaces and suspended for floor joists
●● supply and return duct requirments? Answer: adequate size, properly
sealed, and well insulated
●● what component does the outdoor coil act as on a heat pump?
Answer: evaporator
, ●● what component does the indoor coil act as on a heat pump? Answer:
condenser
●● describe what a compressor does? Answer: acts as a pump, circulates
refrigerant through tubing
●● what does the metering device do in a refrigeration circuit? Answer:
regulates flow of refrigerant to achieve desired refrigerant temperatures
●● list the different refrigerants that have been used in homes. Answer:
R-12, R-500, R-22, R-410A
●● why could a loose fan belt have an impact on air flow? Answer: It
could slip on its pulley, thereby slowing the fan speed and reducing air
flow.
●● Describe grilles Answer: coverings with small opening that allow air
to pass through them, while preventing large objects from entering
●● Describe location of supply register Answer: outer walls or under
windows
●● Describe location of return register Answer: up high on inside walls
