NATE CORE PRACTICE COMPREHENSIVE TEST
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ Recycling machines. Answer: May contain filter-driers, oil
separators, and recover refrigerant in liquid phase
◉ Relay. Answer: Used to convert contacts, control voltage circuits,
and reduce electrical hum
◉ Time delay relay. Answer: Prevents thermostat short cycling of a
compressor
◉ Self-purging recovery machine. Answer: Automatically vents most
non-condensable refrigerants
◉ Air flow. Answer: Moves from spaces of higher pressure to lower
pressure
◉ Split system air conditioner. Answer: Consists of a remote
condensing unit and an evaporator
, ◉ Horizontal flexible duct. Answer: Should be supported at intervals
not to exceed 8 to 9 feet
◉ Evaporator coil change. Answer: Installer must ensure vertical
cabinet, level condensate pan, and check fin spacing
◉ Direct drive blower wheel. Answer: Has an rpm determined by the
blower motor
◉ Short radius elbows. Answer: Added to a suction line can affect
system efficiency
◉ Suction line condensation. Answer: A concern when routing
refrigerant lines underground or within a wall
◉ Oxyacetylene torch. Answer: Uses a neutral flame for silver
soldering
◉ Electronic charging scale. Answer: Must be set for the weight of
desired charge before use
◉ Fabricated duct board sections. Answer: Should be stapled and
sealed with approved foil tape
2026 QUESTIONS WITH ANSWERS GRADED
A+
◉ Recycling machines. Answer: May contain filter-driers, oil
separators, and recover refrigerant in liquid phase
◉ Relay. Answer: Used to convert contacts, control voltage circuits,
and reduce electrical hum
◉ Time delay relay. Answer: Prevents thermostat short cycling of a
compressor
◉ Self-purging recovery machine. Answer: Automatically vents most
non-condensable refrigerants
◉ Air flow. Answer: Moves from spaces of higher pressure to lower
pressure
◉ Split system air conditioner. Answer: Consists of a remote
condensing unit and an evaporator
, ◉ Horizontal flexible duct. Answer: Should be supported at intervals
not to exceed 8 to 9 feet
◉ Evaporator coil change. Answer: Installer must ensure vertical
cabinet, level condensate pan, and check fin spacing
◉ Direct drive blower wheel. Answer: Has an rpm determined by the
blower motor
◉ Short radius elbows. Answer: Added to a suction line can affect
system efficiency
◉ Suction line condensation. Answer: A concern when routing
refrigerant lines underground or within a wall
◉ Oxyacetylene torch. Answer: Uses a neutral flame for silver
soldering
◉ Electronic charging scale. Answer: Must be set for the weight of
desired charge before use
◉ Fabricated duct board sections. Answer: Should be stapled and
sealed with approved foil tape
