GAS FITTER 2 PRACTICE TEST 2026 UPDATED EXAM QUESTIONS
& ANSWERS WITH DETAILED RATIONALES | INSTANT PDF
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A room heater installed in either a sleeping area or public area shall be:
A. direct vent only
B. equipped with a regulator
C. equipped with a fan
D. equipped with an on / off switch on the wall - correct answer -B
What type of vent must be used when the vent of a wall furnace will be concealed in a partition
wall?
A. B vent
B. L vent
C. BH vent
D. BW vent - correct answer -D
Single wall vent connectors:
A. may pass through floors, ceilings or roofs provided a metal thimble is used
B. may pass through floors, ceilings or roofs provided the required minimum distance from
combustible material is maintained
C. may pass through floors, ceilings or roofs provided they are insulated
D. shall not pass through floors, ceilings or roofs - correct answer -D
BW vent shall be used only with an approved:
A. decorative appliance
B. down flow furnace
,C. revertible flue boiler
D. recessed wall furnace - correct answer -D
What must be done during the installation of a gas log fireplace?
A. Make sure there is a metal mesh screen in front of the fireplace
B. Secure the chimney damper in the open position
C. Install a pressure regulator
D. Install a metal chimney liner - correct answer -B
When can a certified hose be used to connect a construction heater to temporary piping?
A. Only if a lever handle shut off valve is installed upstream of the hose
B. Only if the hose is 15 feet long
C. Never - correct answer -A
Which of the following is acceptable when a fireplace insert is installed?
A. A metal chimney linear
B. The existing fireplace flue
C. BW vent
D. A tile lined fireplace flue? - correct answer -A
An unvented infra-red heater can be installed in ________ application
A. A warehouse
B. A commercial building
C. An industrial building
D. All of the above - correct answer -D
,Dirt pockets are required on:
A. Decorative appliances
B. Gas logs
C. Room heaters
D. None of the available choices - correct answer -D
What diameter and length of a dirt pocket is required when a drop line is 3-inch diameter?
A. 3 inch diameter by 3 inches long
B. 1 inch diameter by 3 inches long
C. 3/4 inch diameter by 3 inches long
D. 2 inch diameter by 3 inches long - correct answer -D
What type of room heater maybe installed in a bathroom?
A. Natural draft
B. Direct fired
C. Forced draft
D. Direct vent - correct answer -D
What safety control protects a steam boiler if the condensate pump fails to return water to the
boiler?
A. High pressure limit control
B. Low pressure limit control
C. Flame safeguard control
D. Low water cut off - correct answer -D
The relief valve for a residential low-pressure hot water boiler system should be?
, A. 14.7 psia
B. 15 psia
C. 30 psig
D. 30 psia - correct answer -C
A sbackflow sprevent sused sin sa sboiler ssystem sshould sbe slocated sin sthe:
A. sOver sflow sline sconnected sto sthe sdrain
B. sReturn sline sclose sto sthe sboiler
C. s1/4" sline sconnecting sthe sboiler sand scushion stank
D. sMake sup swater sline sto sthe ssystem s- scorrect s sanswer s-B
Automatic schlorinators smust sbe sinstalled:
A. supstream sof sthe sheater
B. sdownstream sof sthe sheater
C. supstream sof sthe sfilter
D. sdownstream sof sthe sfilter s- scorrect s sanswer s-B
On sseasonal sstart sup, sa spool sheater sshould srun:
A. sintermittently
B. scontinuously sfor s24 shours
C. scontinuously suntil sthe sthermostat sis ssatisfied
D. sone shour son sand sone shour soff suntil sthe sthermostat sis ssatisfied s- scorrect s sanswer s-C
Before slighting sa sburner sin sa ssteam sboiler, sensure sthat:
A. sthere sis swater sin sthe sboiler
B. sthe stemperature scontroller sis sset sproperly
& ANSWERS WITH DETAILED RATIONALES | INSTANT PDF
DOWNLOAD
A room heater installed in either a sleeping area or public area shall be:
A. direct vent only
B. equipped with a regulator
C. equipped with a fan
D. equipped with an on / off switch on the wall - correct answer -B
What type of vent must be used when the vent of a wall furnace will be concealed in a partition
wall?
A. B vent
B. L vent
C. BH vent
D. BW vent - correct answer -D
Single wall vent connectors:
A. may pass through floors, ceilings or roofs provided a metal thimble is used
B. may pass through floors, ceilings or roofs provided the required minimum distance from
combustible material is maintained
C. may pass through floors, ceilings or roofs provided they are insulated
D. shall not pass through floors, ceilings or roofs - correct answer -D
BW vent shall be used only with an approved:
A. decorative appliance
B. down flow furnace
,C. revertible flue boiler
D. recessed wall furnace - correct answer -D
What must be done during the installation of a gas log fireplace?
A. Make sure there is a metal mesh screen in front of the fireplace
B. Secure the chimney damper in the open position
C. Install a pressure regulator
D. Install a metal chimney liner - correct answer -B
When can a certified hose be used to connect a construction heater to temporary piping?
A. Only if a lever handle shut off valve is installed upstream of the hose
B. Only if the hose is 15 feet long
C. Never - correct answer -A
Which of the following is acceptable when a fireplace insert is installed?
A. A metal chimney linear
B. The existing fireplace flue
C. BW vent
D. A tile lined fireplace flue? - correct answer -A
An unvented infra-red heater can be installed in ________ application
A. A warehouse
B. A commercial building
C. An industrial building
D. All of the above - correct answer -D
,Dirt pockets are required on:
A. Decorative appliances
B. Gas logs
C. Room heaters
D. None of the available choices - correct answer -D
What diameter and length of a dirt pocket is required when a drop line is 3-inch diameter?
A. 3 inch diameter by 3 inches long
B. 1 inch diameter by 3 inches long
C. 3/4 inch diameter by 3 inches long
D. 2 inch diameter by 3 inches long - correct answer -D
What type of room heater maybe installed in a bathroom?
A. Natural draft
B. Direct fired
C. Forced draft
D. Direct vent - correct answer -D
What safety control protects a steam boiler if the condensate pump fails to return water to the
boiler?
A. High pressure limit control
B. Low pressure limit control
C. Flame safeguard control
D. Low water cut off - correct answer -D
The relief valve for a residential low-pressure hot water boiler system should be?
, A. 14.7 psia
B. 15 psia
C. 30 psig
D. 30 psia - correct answer -C
A sbackflow sprevent sused sin sa sboiler ssystem sshould sbe slocated sin sthe:
A. sOver sflow sline sconnected sto sthe sdrain
B. sReturn sline sclose sto sthe sboiler
C. s1/4" sline sconnecting sthe sboiler sand scushion stank
D. sMake sup swater sline sto sthe ssystem s- scorrect s sanswer s-B
Automatic schlorinators smust sbe sinstalled:
A. supstream sof sthe sheater
B. sdownstream sof sthe sheater
C. supstream sof sthe sfilter
D. sdownstream sof sthe sfilter s- scorrect s sanswer s-B
On sseasonal sstart sup, sa spool sheater sshould srun:
A. sintermittently
B. scontinuously sfor s24 shours
C. scontinuously suntil sthe sthermostat sis ssatisfied
D. sone shour son sand sone shour soff suntil sthe sthermostat sis ssatisfied s- scorrect s sanswer s-C
Before slighting sa sburner sin sa ssteam sboiler, sensure sthat:
A. sthere sis swater sin sthe sboiler
B. sthe stemperature scontroller sis sset sproperly
