NEVADA C-21B AIR CONDITIONING
CONTRACTOR ACTUAL EXAM PAPER 2026
◉ Work that is exempt from being required from having mechanical
permit. Answer: Portable heat appliances, closed system of steam
piping, or unit refrigeration system
◉ Hydraulic testing of process piping must be done at not less than.
Answer: Not less than one and one-half times the operating pressure
◉ A space having a volume less than 50 cubic feet per 1000tu/h of
the agragate input rating of all its burning appliances is. Answer:
Confined space
◉ The automatic controls on a water heater limit leaving
temperature to a maximum of. Answer: 210 degrees
◉ Gas piping shall be installed in a manner. Answer: To not interfere
with inspection, maintenance, and servicing
◉ How much ventilation air is required for a nail salon. Answer: 20
cfm/person
, ◉ A 120 volt electrical receptacle is required within ______ of the
equipment. Answer: 25 feet
◉ Exhaust system make up air shall be provided to replenish air.
Answer: Exhausted by the ventilation system
◉ Grease filter must be installed at an angle of not less than.
Answer: 45 degrees
◉ Electric duct heaters shall be equipped with an automatic reset
temperature limit. Answer: 200 degrees
◉ R-134a is. Answer: In safety group A1
◉ The minimum dimension of outdoor combustion air opening shall
be no less than. Answer: 76mm
◉ A joint made by joining metal parts with metallic mixture or alloys
that melt at a temperature up to and including 840 degrees F.
Answer: A soldered joint
◉ Electrical wires and cables and optical fiber cables shall be listed
and labeled for use n plenums and shall have a flame spread
distance not exceeding. Answer: 5 feet
CONTRACTOR ACTUAL EXAM PAPER 2026
◉ Work that is exempt from being required from having mechanical
permit. Answer: Portable heat appliances, closed system of steam
piping, or unit refrigeration system
◉ Hydraulic testing of process piping must be done at not less than.
Answer: Not less than one and one-half times the operating pressure
◉ A space having a volume less than 50 cubic feet per 1000tu/h of
the agragate input rating of all its burning appliances is. Answer:
Confined space
◉ The automatic controls on a water heater limit leaving
temperature to a maximum of. Answer: 210 degrees
◉ Gas piping shall be installed in a manner. Answer: To not interfere
with inspection, maintenance, and servicing
◉ How much ventilation air is required for a nail salon. Answer: 20
cfm/person
, ◉ A 120 volt electrical receptacle is required within ______ of the
equipment. Answer: 25 feet
◉ Exhaust system make up air shall be provided to replenish air.
Answer: Exhausted by the ventilation system
◉ Grease filter must be installed at an angle of not less than.
Answer: 45 degrees
◉ Electric duct heaters shall be equipped with an automatic reset
temperature limit. Answer: 200 degrees
◉ R-134a is. Answer: In safety group A1
◉ The minimum dimension of outdoor combustion air opening shall
be no less than. Answer: 76mm
◉ A joint made by joining metal parts with metallic mixture or alloys
that melt at a temperature up to and including 840 degrees F.
Answer: A soldered joint
◉ Electrical wires and cables and optical fiber cables shall be listed
and labeled for use n plenums and shall have a flame spread
distance not exceeding. Answer: 5 feet
