Gas Heat-HVAC Exam UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Upflow - CORRECT ANSWER A furnace with a vertical air flow through the heat exchanger
and the blower compartment beneath the heat exchanger is called a(n)___.
Spud - CORRECT ANSWER The orifice is a precisely sized hole in the____.
Atmospheric - CORRECT ANSWER Most gas furnaces and appliances use a(n)_____.
Blue with Slight Orange Tips - CORRECT ANSWER The proper color of a gas flame is_____.
Vented by Natural Convection - CORRECT ANSWER In a conventional gas furnace, the hot
flue gases are___.
Latent Heat - CORRECT ANSWER A condensing gas furnace uses_____ from a condenser-
type heat exchanger to improve the furnace efficiency.
Integrated Furnace Controller (IFC) - CORRECT ANSWER A small microprocessor with
integrated circuits mounted on a board to control the logic or sequence events is a(an):
Micro-amp - CORRECT ANSWER Flame current in a flame rectification system is measured
in____ units.
Pre-purge - CORRECT ANSWER A process where the combustion air blower motor runs for a
specified time period before the furnace lites to ensure a safe ignition is called:
Measure Gas Pressure - CORRECT ANSWER A manometer is used to:
Flame Sensor - CORRECT ANSWER A device in a gas furnace that detects the presence of a
flame to ensure safe operation.
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Upflow - CORRECT ANSWER A furnace with a vertical air flow through the heat exchanger
and the blower compartment beneath the heat exchanger is called a(n)___.
Spud - CORRECT ANSWER The orifice is a precisely sized hole in the____.
Atmospheric - CORRECT ANSWER Most gas furnaces and appliances use a(n)_____.
Blue with Slight Orange Tips - CORRECT ANSWER The proper color of a gas flame is_____.
Vented by Natural Convection - CORRECT ANSWER In a conventional gas furnace, the hot
flue gases are___.
Latent Heat - CORRECT ANSWER A condensing gas furnace uses_____ from a condenser-
type heat exchanger to improve the furnace efficiency.
Integrated Furnace Controller (IFC) - CORRECT ANSWER A small microprocessor with
integrated circuits mounted on a board to control the logic or sequence events is a(an):
Micro-amp - CORRECT ANSWER Flame current in a flame rectification system is measured
in____ units.
Pre-purge - CORRECT ANSWER A process where the combustion air blower motor runs for a
specified time period before the furnace lites to ensure a safe ignition is called:
Measure Gas Pressure - CORRECT ANSWER A manometer is used to:
Flame Sensor - CORRECT ANSWER A device in a gas furnace that detects the presence of a
flame to ensure safe operation.
