HVAC Gas Heat Exams (Latest 2024/ 2025 Updates
BUNDLE PACKAGE WITH COMPLETE SOLUTIONS) 100%
Correct Questions and Verified Answers | Grade A
The division of air into primary and secondary types is a matter of which of the
following - ANSWERPressure 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 __________ - ANSWER5 PPM
Gas Burners approved by the ________ should be used in a heating system -
ANSWERAGA
Current Flow - ANSWERThe flow of electrons
Impedance - ANSWEROpposition of current flow
Conducter - ANSWERMaterial that will readily release electrons
Symbol for current - ANSWERI
The Primary air is admitted at a ratio of about __________ parts primary air to 1 part
gas, for manufactured gas - ANSWER5
An __________ is characterized by a burner tube that extends horizontally from the
unit and then bends to assume a vertical position - ANSWERUpshot gas burner
What cannot be carried out to identify leaks in gas piping - ANSWERFlame Test
The Bunsen burner flame is __________ in color - ANSWERBluish
No more than _______ of Carbon monoxide is allowed in furnace flue gases air
measurement - ANSWER400 ppm
Natural gas has a heating value of approximately ________ Btu per cubic foot -
ANSWER1000
Joint Compound in gas piping is applied sparingly to the threads only - ANSWERmale
LPG has a specific gravity of _____ - ANSWER1.5
Too much ________________ causes the flame to lift off the burner ports -
ANSWERPrimary Air
, _______________ is regulated by means of an adjustable shutter - ANSWERPrimary
Air
________________ will also control back-drafts that tend to extinguish the gas
burner flame and the amount of excess air. - ANSWERDraft Hood
Which of the following fuel is used Direct Gas-Fired Heating Systems -
ANSWERNatural Gas
The maximum allowable concentration of continuous 24hr exposure of Carbon
monoxide according to ASHRAE is about ___________ - ANSWER0.009 ppm
When burning natural gas, the air adjustment is generally made to secure as
__________ a flame as possible - ANSWERBlue
___________ on pipes and pipe fittings should be located by spreading a soap
solution over the surface - ANSWERGas Leaks
Which of the following gas is the main constituent in Natural gas - ANSWERMethane
A yellow flame indicates dependence entirely on ______ air for combustion -
ANSWERSecondary
The primary air is admitted at a ratio of about _______ parts primary air to 1 part gas
for natural gas - ANSWER10
During incomplete combustion which of the following is produced - ANSWERCO
Propane is ______ than air - ANSWERHeavier
Natural gas has a specific gravity of _____ - ANSWER0.6
Which fittings should NOT be used for the main gas line - ANSWERAluminum tubing
OSHA standards prohibit worker exposure to Carbon monoxide not more than _____
PPM air averaged during an 8 hour period - ANSWER50
Install the main manual gas shutoff valve on the riser at least _______ above the
floor level - ANSWER4 ft
The Bunsen burner flame is practically _________ - ANSWERNonluminous
The burner tube of an ________ is commonly a straight, adjustable venturi that
extends horizontally from the unit - ANSWERInshot Gas Burner
A ___________ is used to ensure the maintenance of constant lowdraft conditions in
the combustion chamber with a resultant stability of air supply - ANSWERDraft Hood
BUNDLE PACKAGE WITH COMPLETE SOLUTIONS) 100%
Correct Questions and Verified Answers | Grade A
The division of air into primary and secondary types is a matter of which of the
following - ANSWERPressure 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 __________ - ANSWER5 PPM
Gas Burners approved by the ________ should be used in a heating system -
ANSWERAGA
Current Flow - ANSWERThe flow of electrons
Impedance - ANSWEROpposition of current flow
Conducter - ANSWERMaterial that will readily release electrons
Symbol for current - ANSWERI
The Primary air is admitted at a ratio of about __________ parts primary air to 1 part
gas, for manufactured gas - ANSWER5
An __________ is characterized by a burner tube that extends horizontally from the
unit and then bends to assume a vertical position - ANSWERUpshot gas burner
What cannot be carried out to identify leaks in gas piping - ANSWERFlame Test
The Bunsen burner flame is __________ in color - ANSWERBluish
No more than _______ of Carbon monoxide is allowed in furnace flue gases air
measurement - ANSWER400 ppm
Natural gas has a heating value of approximately ________ Btu per cubic foot -
ANSWER1000
Joint Compound in gas piping is applied sparingly to the threads only - ANSWERmale
LPG has a specific gravity of _____ - ANSWER1.5
Too much ________________ causes the flame to lift off the burner ports -
ANSWERPrimary Air
, _______________ is regulated by means of an adjustable shutter - ANSWERPrimary
Air
________________ will also control back-drafts that tend to extinguish the gas
burner flame and the amount of excess air. - ANSWERDraft Hood
Which of the following fuel is used Direct Gas-Fired Heating Systems -
ANSWERNatural Gas
The maximum allowable concentration of continuous 24hr exposure of Carbon
monoxide according to ASHRAE is about ___________ - ANSWER0.009 ppm
When burning natural gas, the air adjustment is generally made to secure as
__________ a flame as possible - ANSWERBlue
___________ on pipes and pipe fittings should be located by spreading a soap
solution over the surface - ANSWERGas Leaks
Which of the following gas is the main constituent in Natural gas - ANSWERMethane
A yellow flame indicates dependence entirely on ______ air for combustion -
ANSWERSecondary
The primary air is admitted at a ratio of about _______ parts primary air to 1 part gas
for natural gas - ANSWER10
During incomplete combustion which of the following is produced - ANSWERCO
Propane is ______ than air - ANSWERHeavier
Natural gas has a specific gravity of _____ - ANSWER0.6
Which fittings should NOT be used for the main gas line - ANSWERAluminum tubing
OSHA standards prohibit worker exposure to Carbon monoxide not more than _____
PPM air averaged during an 8 hour period - ANSWER50
Install the main manual gas shutoff valve on the riser at least _______ above the
floor level - ANSWER4 ft
The Bunsen burner flame is practically _________ - ANSWERNonluminous
The burner tube of an ________ is commonly a straight, adjustable venturi that
extends horizontally from the unit - ANSWERInshot Gas Burner
A ___________ is used to ensure the maintenance of constant lowdraft conditions in
the combustion chamber with a resultant stability of air supply - ANSWERDraft Hood
