HVAC Master Exam Newest 2026 Questions and
Correct Detailed Answers Already Graded A+
A boiler operates at 150psi and 225 degree is called - CORRECT ANSWER-Low
pressure hot water
Materials used for fuel liner are all of the following except: - CORRECT
ANSWER-PVC
Minimum heigh above the highest point of the roof for type L vent - CORRECT
ANSWER-2'
Venting for appliances is prohibited from passing through which of the following -
CORRECT ANSWER-Air-duct
Minimum thickness of 16" connector in medium heat appliance - CORRECT
ANSWER-12 Gage
Which of the following methods can be used in connectors joints - CORRECT
ANSWER-Fasten with a screw
, Minimum distance for plume discharge of colling tower above a ventilation inlet
to a building - CORRECT ANSWER-5'
Potable water line that delivers makeup water to a hydronic boiler is required to
have - CORRECT ANSWER-A hand valve and pressure vacuum breaker
Minimum distance from the roof edge that will not require guard rail when an
appliance is installed which need roof hatch, provided that the roof is 8ft from the
grade level. - CORRECT ANSWER-10'
Minimum clearance for all sides of a central warm air furnace to be installed in a
new construction - CORRECT ANSWER-3"
Maximum horizontal hanger spacing for steel pipe in hydronic system -
CORRECT ANSWER-12'
Equipment installed under floor shall have a minimum accessible are of -
CORRECT ANSWER-22"X30"
Minimum depth of an auxiliary drain pain in a condensate disposal - CORRECT
ANSWER-1.5"
Correct Detailed Answers Already Graded A+
A boiler operates at 150psi and 225 degree is called - CORRECT ANSWER-Low
pressure hot water
Materials used for fuel liner are all of the following except: - CORRECT
ANSWER-PVC
Minimum heigh above the highest point of the roof for type L vent - CORRECT
ANSWER-2'
Venting for appliances is prohibited from passing through which of the following -
CORRECT ANSWER-Air-duct
Minimum thickness of 16" connector in medium heat appliance - CORRECT
ANSWER-12 Gage
Which of the following methods can be used in connectors joints - CORRECT
ANSWER-Fasten with a screw
, Minimum distance for plume discharge of colling tower above a ventilation inlet
to a building - CORRECT ANSWER-5'
Potable water line that delivers makeup water to a hydronic boiler is required to
have - CORRECT ANSWER-A hand valve and pressure vacuum breaker
Minimum distance from the roof edge that will not require guard rail when an
appliance is installed which need roof hatch, provided that the roof is 8ft from the
grade level. - CORRECT ANSWER-10'
Minimum clearance for all sides of a central warm air furnace to be installed in a
new construction - CORRECT ANSWER-3"
Maximum horizontal hanger spacing for steel pipe in hydronic system -
CORRECT ANSWER-12'
Equipment installed under floor shall have a minimum accessible are of -
CORRECT ANSWER-22"X30"
Minimum depth of an auxiliary drain pain in a condensate disposal - CORRECT
ANSWER-1.5"
