HVAC GAS HEAT CERTIFICATION
EXAM 2025-2026 QUESTIONS &
CORRECT ANSWERS
A gas furnace is to be installed in a garage. The national standards require
that the burners and ignition sources must be located above the
floor - ✅✅-18 inches
A good description of how a bi-metal fan switch operates the blower motor
on a gas furnace is - ✅✅-Temperature on- temperature off
Redundant gas valves used on gas furnaces have - ✅✅-Dual gas shut off
seats
Burning one cubic foot of liquefied petroleum gas completely will
produce approximately BTUs - ✅✅-2000 - 2500
LP gas has a specific gravity of - ✅✅-1.5 - 2.0
What is the purpose of a spoiler screw located on a burner,
or adjustable-shutters? - ✅✅-Mix primary air and gas
Furnace limit switches are wired in series with the - ✅✅-Gas valve
A technician is using an extension ladder to work on roof top unit. The
, top of the ladder should extend beyond the support point - ✅✅-3
feet
A technician determines that a natural gas furnace has a defective heat
exchanger. The technician should - ✅✅-Inform the homeowner and turn
the gas off
A natural gas furnace usually requires gas pressure at the manifold
and burners - ✅✅-3.5 in. W.C.
The vent system for a condensing furnace is classified as by the
National
Field Gas Code. - ✅✅-Category IV
Type B vent pipe must be kept at least from combustible materials
-✅✅-One inch
Typical condensing furnaces have an AFUE rating of at least - ✅✅-90%
You have installed a Category IV two-pipe vent system that terminates
through the roof of the residence. The elbow for the combustion air intake,
above the roof, should - ✅✅-Point it down
The reason heating thermostat have anticipated is to - ✅✅-Reduce lag
The typical flue gas temperature of a Category III furnace is - ✅✅-280°F
- 300°F
Natural gas primary consists of - ✅✅-Methane
EXAM 2025-2026 QUESTIONS &
CORRECT ANSWERS
A gas furnace is to be installed in a garage. The national standards require
that the burners and ignition sources must be located above the
floor - ✅✅-18 inches
A good description of how a bi-metal fan switch operates the blower motor
on a gas furnace is - ✅✅-Temperature on- temperature off
Redundant gas valves used on gas furnaces have - ✅✅-Dual gas shut off
seats
Burning one cubic foot of liquefied petroleum gas completely will
produce approximately BTUs - ✅✅-2000 - 2500
LP gas has a specific gravity of - ✅✅-1.5 - 2.0
What is the purpose of a spoiler screw located on a burner,
or adjustable-shutters? - ✅✅-Mix primary air and gas
Furnace limit switches are wired in series with the - ✅✅-Gas valve
A technician is using an extension ladder to work on roof top unit. The
, top of the ladder should extend beyond the support point - ✅✅-3
feet
A technician determines that a natural gas furnace has a defective heat
exchanger. The technician should - ✅✅-Inform the homeowner and turn
the gas off
A natural gas furnace usually requires gas pressure at the manifold
and burners - ✅✅-3.5 in. W.C.
The vent system for a condensing furnace is classified as by the
National
Field Gas Code. - ✅✅-Category IV
Type B vent pipe must be kept at least from combustible materials
-✅✅-One inch
Typical condensing furnaces have an AFUE rating of at least - ✅✅-90%
You have installed a Category IV two-pipe vent system that terminates
through the roof of the residence. The elbow for the combustion air intake,
above the roof, should - ✅✅-Point it down
The reason heating thermostat have anticipated is to - ✅✅-Reduce lag
The typical flue gas temperature of a Category III furnace is - ✅✅-280°F
- 300°F
Natural gas primary consists of - ✅✅-Methane
