Gas Heat esco exam questions with correct
answers
A gas furnace to be installed in a garage. The national standards requires that
the burners and ignition must be located ____ above the floor: - ....🔰
VERIFIED ANSWERS.... ✔✔18 inches
A good description of how a bi-metal fan switch operates the blower motor on
a gas furnace is: - ....🔰VERIFIED ANSWERS.... ✔✔Temperature on/
Temperature off
Redundant gas valves used on gas furnaces will shut down if gas pressure
exceeds: - ....🔰VERIFIED ANSWERS.... ✔✔13.5 in W.C. (or 1/2 psi)
This is the maximum pressure for gas valve operation
Burning one cubic foot of Liquefied Petroleum gas completely will produce
approximately ____ BTUs. - ....🔰VERIFIED ANSWERS.... ✔✔2,000 -
2,500
LP gas has a specific gravity of ...? - ....🔰VERIFIED ANSWERS....
✔✔1.5 - 2.0 ( actual is 1.5 heavier than air which is 1.0)
What is the purpose of a spoiler screw located on a burner, or adjustable-
shutters? - ....🔰VERIFIED ANSWERS.... ✔✔to mix primary air and
gas
, Furnace limit switches are wired in series with the: - ....🔰VERIFIED
ANSWERS.... ✔✔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. - ....🔰VERIFIED
ANSWERS.... ✔✔3 feet
A technician determines that a natural gas furnace has a defective heat
exchanger. The technician should: - ....🔰VERIFIED ANSWERS....
✔✔Inform the home owner and turn the gas off.
A natural gas furnace usually requires _____ gas pressure AT the manifold and
burners.
What should the inlet pressure be to the manifold? - ....🔰VERIFIED
ANSWERS.... ✔✔3.5 in WC
inlet- 5-7 in WC
The vent system for a condensing furnace is classified as ___ by the National
Field Gas Code. - ....🔰VERIFIED ANSWERS.... ✔✔Category IV (4)
Type B vent pipe must be kept at least ____ from combustible materials. - ....🔰
VERIFIED ANSWERS.... ✔✔one inch
Typical condensing furnaces have an AFUE rating of at least: - ....🔰
VERIFIED ANSWERS.... ✔✔90%
answers
A gas furnace to be installed in a garage. The national standards requires that
the burners and ignition must be located ____ above the floor: - ....🔰
VERIFIED ANSWERS.... ✔✔18 inches
A good description of how a bi-metal fan switch operates the blower motor on
a gas furnace is: - ....🔰VERIFIED ANSWERS.... ✔✔Temperature on/
Temperature off
Redundant gas valves used on gas furnaces will shut down if gas pressure
exceeds: - ....🔰VERIFIED ANSWERS.... ✔✔13.5 in W.C. (or 1/2 psi)
This is the maximum pressure for gas valve operation
Burning one cubic foot of Liquefied Petroleum gas completely will produce
approximately ____ BTUs. - ....🔰VERIFIED ANSWERS.... ✔✔2,000 -
2,500
LP gas has a specific gravity of ...? - ....🔰VERIFIED ANSWERS....
✔✔1.5 - 2.0 ( actual is 1.5 heavier than air which is 1.0)
What is the purpose of a spoiler screw located on a burner, or adjustable-
shutters? - ....🔰VERIFIED ANSWERS.... ✔✔to mix primary air and
gas
, Furnace limit switches are wired in series with the: - ....🔰VERIFIED
ANSWERS.... ✔✔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. - ....🔰VERIFIED
ANSWERS.... ✔✔3 feet
A technician determines that a natural gas furnace has a defective heat
exchanger. The technician should: - ....🔰VERIFIED ANSWERS....
✔✔Inform the home owner and turn the gas off.
A natural gas furnace usually requires _____ gas pressure AT the manifold and
burners.
What should the inlet pressure be to the manifold? - ....🔰VERIFIED
ANSWERS.... ✔✔3.5 in WC
inlet- 5-7 in WC
The vent system for a condensing furnace is classified as ___ by the National
Field Gas Code. - ....🔰VERIFIED ANSWERS.... ✔✔Category IV (4)
Type B vent pipe must be kept at least ____ from combustible materials. - ....🔰
VERIFIED ANSWERS.... ✔✔one inch
Typical condensing furnaces have an AFUE rating of at least: - ....🔰
VERIFIED ANSWERS.... ✔✔90%
