Esco Gas Furnace Exam Questions and
Answers 100% Pass
Burning one cubic foot of natural gas will produce approximately _____ BTU's -
✔✔900-1,100 BTU
The Natural Fuel Gas code classifies a vent system for a condensing furnace as : -
✔✔Category IV
what type of draft is used to move flue gas through the heat exchanger and into the
venting system in modern gas-fired furnaces? - ✔✔Mechanical
A customer complains that a 2-year-old, direct, hot surface ignition furnace will not
light. The inducer motor runs, the pressure switch closes, and the igniter begins to
glow, but there is no ignition. The furnace locks out while attempting to light. After
resetting the furnace, 17 VAC is measured at the gas valve and the technician correctly
concludes: - ✔✔The Electonic board is faulty
The efficiency rating of gas-burning appliance is determined using: - ✔✔Annual Fuel
Utilization Efficiency (AFUE)
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, when the burners of a furnace are ignited the blower motor operation is delayed to: -
✔✔Allow heat exchanger to warm up
Typical condensing furnaces have an AFUE rating of at least - ✔✔90%
A gas furnace has an integrated furnace control (IFC). How is the fan cycled during
heating? - ✔✔Heat Relay
What reading should a good thermocouple produce on a DC meter - ✔✔30 millivolts
A furnace nameplate specifies a temperature rise of 40 to 70 degrees. Temperature
measurements indicate a rise of 80 degrees. The most appropriate action is to: -
✔✔Increase the fan speed
The most common burner used in induced draft furnace is: - ✔✔In-shot
You are installing 1/2 and 3/4 black iron pipe to a natural gas furnace. When threading,
what is the approximate number of threads to cut? - ✔✔7-10
When exposed to low concentrations of carbon monoxide, healthy adults may exhibit: -
✔✔Headaches and Nausea
If voltage is applied across two speed terminals on a fan motor, the motor will -
✔✔Short-out/Burn-out
to react to a change in temperature, the fan/limit switch in a standing pilot furnace uses
a helical shaft made of - ✔✔Bi-metal
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Answers 100% Pass
Burning one cubic foot of natural gas will produce approximately _____ BTU's -
✔✔900-1,100 BTU
The Natural Fuel Gas code classifies a vent system for a condensing furnace as : -
✔✔Category IV
what type of draft is used to move flue gas through the heat exchanger and into the
venting system in modern gas-fired furnaces? - ✔✔Mechanical
A customer complains that a 2-year-old, direct, hot surface ignition furnace will not
light. The inducer motor runs, the pressure switch closes, and the igniter begins to
glow, but there is no ignition. The furnace locks out while attempting to light. After
resetting the furnace, 17 VAC is measured at the gas valve and the technician correctly
concludes: - ✔✔The Electonic board is faulty
The efficiency rating of gas-burning appliance is determined using: - ✔✔Annual Fuel
Utilization Efficiency (AFUE)
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, when the burners of a furnace are ignited the blower motor operation is delayed to: -
✔✔Allow heat exchanger to warm up
Typical condensing furnaces have an AFUE rating of at least - ✔✔90%
A gas furnace has an integrated furnace control (IFC). How is the fan cycled during
heating? - ✔✔Heat Relay
What reading should a good thermocouple produce on a DC meter - ✔✔30 millivolts
A furnace nameplate specifies a temperature rise of 40 to 70 degrees. Temperature
measurements indicate a rise of 80 degrees. The most appropriate action is to: -
✔✔Increase the fan speed
The most common burner used in induced draft furnace is: - ✔✔In-shot
You are installing 1/2 and 3/4 black iron pipe to a natural gas furnace. When threading,
what is the approximate number of threads to cut? - ✔✔7-10
When exposed to low concentrations of carbon monoxide, healthy adults may exhibit: -
✔✔Headaches and Nausea
If voltage is applied across two speed terminals on a fan motor, the motor will -
✔✔Short-out/Burn-out
to react to a change in temperature, the fan/limit switch in a standing pilot furnace uses
a helical shaft made of - ✔✔Bi-metal
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