HVAC (Gas Heat) Master Test
Questions and Complete
Solutions Graded A+
The division of air into primary and secondary types is a matter of which of the following - Answer:
Pressure of gas available, burner design, type of flame desired (all of them)
In the air stream leaving direct gas fired units, concentrations of carbon monoxide as per ANSI shall not
be more than __________ - Answer: 5 PPM
Gas Burners approved by the ________ should be used in a heating system - Answer: AGA
Current Flow - Answer: The flow of electrons
Impedance - Answer: Opposition of current flow
Conducter - Answer: Material that will readily release electrons
Symbol for current - Answer: I
The Primary air is admitted at a ratio of about __________ parts primary air to 1 part gas, for
manufactured gas - Answer: 5
An __________ is characterized by a burner tube that extends horizontally from the unit and then bends
to assume a vertical position - Answer: Upshot gas burner
What cannot be carried out to identify leaks in gas piping - Answer: Flame Test
The Bunsen burner flame is __________ in color - Answer: Bluish
, No more than _______ of Carbon monoxide is allowed in furnace flue gases air measurement - Answer:
400 ppm
Natural gas has a heating value of approximately ________ Btu per cubic foot - Answer: 1000
Joint Compound in gas piping is applied sparingly to the threads only - Answer: male
LPG has a specific gravity of _____ - Answer: 1.5
Too much ________________ causes the flame to lift off the burner ports - Answer: Primary Air
_______________ is regulated by means of an adjustable shutter - Answer: Primary Air
________________ will also control back-drafts that tend to extinguish the gas burner flame and the
amount of excess air. - Answer: Draft Hood
Which of the following fuel is used Direct Gas-Fired Heating Systems - Answer: Natural Gas
The maximum allowable concentration of continuous 24hr exposure of Carbon monoxide according to
ASHRAE is about ___________ - Answer: 0.009 ppm
When burning natural gas, the air adjustment is generally made to secure as __________ a flame as
possible - Answer: Blue
___________ on pipes and pipe fittings should be located by spreading a soap solution over the surface -
Answer: Gas Leaks
Which of the following gas is the main constituent in Natural gas - Answer: Methane
Questions and Complete
Solutions Graded A+
The division of air into primary and secondary types is a matter of which of the following - Answer:
Pressure of gas available, burner design, type of flame desired (all of them)
In the air stream leaving direct gas fired units, concentrations of carbon monoxide as per ANSI shall not
be more than __________ - Answer: 5 PPM
Gas Burners approved by the ________ should be used in a heating system - Answer: AGA
Current Flow - Answer: The flow of electrons
Impedance - Answer: Opposition of current flow
Conducter - Answer: Material that will readily release electrons
Symbol for current - Answer: I
The Primary air is admitted at a ratio of about __________ parts primary air to 1 part gas, for
manufactured gas - Answer: 5
An __________ is characterized by a burner tube that extends horizontally from the unit and then bends
to assume a vertical position - Answer: Upshot gas burner
What cannot be carried out to identify leaks in gas piping - Answer: Flame Test
The Bunsen burner flame is __________ in color - Answer: Bluish
, No more than _______ of Carbon monoxide is allowed in furnace flue gases air measurement - Answer:
400 ppm
Natural gas has a heating value of approximately ________ Btu per cubic foot - Answer: 1000
Joint Compound in gas piping is applied sparingly to the threads only - Answer: male
LPG has a specific gravity of _____ - Answer: 1.5
Too much ________________ causes the flame to lift off the burner ports - Answer: Primary Air
_______________ is regulated by means of an adjustable shutter - Answer: Primary Air
________________ will also control back-drafts that tend to extinguish the gas burner flame and the
amount of excess air. - Answer: Draft Hood
Which of the following fuel is used Direct Gas-Fired Heating Systems - Answer: Natural Gas
The maximum allowable concentration of continuous 24hr exposure of Carbon monoxide according to
ASHRAE is about ___________ - Answer: 0.009 ppm
When burning natural gas, the air adjustment is generally made to secure as __________ a flame as
possible - Answer: Blue
___________ on pipes and pipe fittings should be located by spreading a soap solution over the surface -
Answer: Gas Leaks
Which of the following gas is the main constituent in Natural gas - Answer: Methane
