Gas Fitter 2 Practice Test Questions
and Answers Graded A+
10. On an electrical schematic, all operating controls are drawn:
a) In their energized positions,
b) In their de-energized positions,
c) Normally closed,
d) Normally open. - ANSWER-d
123.Which of the following applies if a furnace is used for temporary heat in a residence
under construction?
a) The connection from the furnace to rigid pipe is made with a flex connector not
exceeding 6 ft in length.
b) Plenums must not be installed until construction is complete
c) The furnace must be installed on a finished concrete floor or slab at least 4" thick and
6" larger than the base of the furnace.
d) The furnace must be wired in accordance with the electrical code except that an "on"
and "off" switch is not required until construction is completed. - ANSWER-C
124. From the following list, what is the most probably cause of a service call where a
combustion gas odour is detected in the heated space whenever the circulating blower
activates?
a) Cracked heat exchanger
b) A problem in the air circulating or distribution system
c) The vent or chimney is plugged
d) The filter requires cleaning or replacement. - ANSWER-A
127. There is a no heat call for the system, use the following...
Terminals at the thermostat reads 24V Gas valve coil reads 0V
Gas Coil to gas coil common reads 24V Points across high limit read 0 volts.
Determine which component is open...
a) Gas valve coil
b) Thermostat
,c) High limit
d) Transformer - ANSWER-B
129. There is a no heat call for the system, use the following...
Thermostat terminals read 0V
Gas valve coil terminals read 24V
Gas valve (thermostat
side) to common terminals read 0V
Gas valve (transformer side) to common terminals read 24V
Determine which component is open:
a) Gas valve coil
b) Thermostat
c) High limit
d) Transformer - ANSWER-A
149. When a gas fired appliance is vented into a chimney flue serving an appliance
which burns a solid fuel in a commercial or industrial application, how shall the vent
from the gas appliance be installed?
a) Through a separate flue opening above the flue pipe connection from the other
appliance
b) Through a separate flue opening below the flue pipe connector from the other
appliance
c) Through a job fabricated branch fitting located not more than 30 inches from the flue
entrance
to the chimney
d) Through a field fabricated branch fitting located not more than 60 inches from the flue
entrance
to the chimney. - ANSWER-
161. Ammeter's can read what?
A. Pressure drop
B. Conductor magnetic field
C. Load in parallel wires
D. Direct power across loads - ANSWER-B
167. When converting an oil furnace to gas what type of atmospheric burner can be
used?
A. Burner tray
B. In shot
C. Ribbon burner
,D. Primary air fan assist burner - ANSWER-B
169. What is the normal return air requirements for forced air furnaces?
a) 700
b) 800
c) 900
d) 1000 - ANSWER-C
188. On a regulator, what senses (measures) outlet pressure?
A. Restricting element
B. Measuring element
C. Loading element
D. Spring element - ANSWER-B
192. A propane service regulator would normally deliver pressure at
A. Pound to 11 in. w.c.
B. Ounces to 7 in. w.c.
C. Ounces to 11 in. w.c.
D. Pound to 7 in. w.c. - ANSWER-A
193. What monitors water flow in a pool heater?
A. Aquastat
B. Low water cut off
C. Pressure switch
D. Flow switch - ANSWER-C
197. For a freestanding propane range in a large kitchen, the flexible connector may be
how long?
A. 10 ft.
B. 6 ft
C. 4 ft.
D. 8 ft. if range is in the center of the kitchen - ANSWER-B
198. An inverted sensor (measures water level) can be found operating what type of
appliance?
A. Hot water boiler
B. Steam water boiler
C. Domestic hot water storage tank
D. Domestic potable hot water tank - ANSWER-D
199. What is the ignition temperature for propane gas?
a) 920 degrees Fahrenheit
b) 1200 degrees Fahrenheit
c) 1800 degrees Fahrenheit
d) 3600 degrees Fahrenheit - ANSWER-A
, 199. What would be the input of a 0.60-gph-oil nozzle?
A. 73 MBtu
B. 70 MBtu
C. 84 MBtu (140 000 x .60)
D. 50 MBtu - ANSWER-C
202. What is the ultimate reading of CO2 (carbon dioxide) for natural gas?
A. 9.9%
B. 10.9%
C. 11.9%
D. 13.9% - ANSWER-C
203. What would be the approximate O2 (oxygen) reading?
A. 9.0%
B. 7.0%
C. 5.0%
D. 3.0% - ANSWER-D
211. What is the minimum location from a property line that a pool heater can be
installed?
A. 24 in.
B. 20 in.
C. 18 in.
D. 12 in. - ANSWER-C
222. When converting a furnace, how far above the burner must the flue collar be?
A. 6 in.
B. 8 in.
C. 10 in.
D. 12 in. - ANSWER-D
223. What would be the approximate time for purging a 1-inch NPS pipe at 100-feet?
A. 50 seconds
B. 1 minute
C. 1 minute, 24 seconds
D. 1 minute, 10 seconds - ANSWER-C
226. On a 14 /12 pitch roof, what would be the termination of a 5-inch B-Vent?
A. 4 ft.
B. 5 ft.
C. 6 ft.
D. 10 ft. - ANSWER-B
227. For a 20 horsepower steam boiler, what would be its maximum input in Btu?
A. 200 Mbtu
B. 530 Mbtu
and Answers Graded A+
10. On an electrical schematic, all operating controls are drawn:
a) In their energized positions,
b) In their de-energized positions,
c) Normally closed,
d) Normally open. - ANSWER-d
123.Which of the following applies if a furnace is used for temporary heat in a residence
under construction?
a) The connection from the furnace to rigid pipe is made with a flex connector not
exceeding 6 ft in length.
b) Plenums must not be installed until construction is complete
c) The furnace must be installed on a finished concrete floor or slab at least 4" thick and
6" larger than the base of the furnace.
d) The furnace must be wired in accordance with the electrical code except that an "on"
and "off" switch is not required until construction is completed. - ANSWER-C
124. From the following list, what is the most probably cause of a service call where a
combustion gas odour is detected in the heated space whenever the circulating blower
activates?
a) Cracked heat exchanger
b) A problem in the air circulating or distribution system
c) The vent or chimney is plugged
d) The filter requires cleaning or replacement. - ANSWER-A
127. There is a no heat call for the system, use the following...
Terminals at the thermostat reads 24V Gas valve coil reads 0V
Gas Coil to gas coil common reads 24V Points across high limit read 0 volts.
Determine which component is open...
a) Gas valve coil
b) Thermostat
,c) High limit
d) Transformer - ANSWER-B
129. There is a no heat call for the system, use the following...
Thermostat terminals read 0V
Gas valve coil terminals read 24V
Gas valve (thermostat
side) to common terminals read 0V
Gas valve (transformer side) to common terminals read 24V
Determine which component is open:
a) Gas valve coil
b) Thermostat
c) High limit
d) Transformer - ANSWER-A
149. When a gas fired appliance is vented into a chimney flue serving an appliance
which burns a solid fuel in a commercial or industrial application, how shall the vent
from the gas appliance be installed?
a) Through a separate flue opening above the flue pipe connection from the other
appliance
b) Through a separate flue opening below the flue pipe connector from the other
appliance
c) Through a job fabricated branch fitting located not more than 30 inches from the flue
entrance
to the chimney
d) Through a field fabricated branch fitting located not more than 60 inches from the flue
entrance
to the chimney. - ANSWER-
161. Ammeter's can read what?
A. Pressure drop
B. Conductor magnetic field
C. Load in parallel wires
D. Direct power across loads - ANSWER-B
167. When converting an oil furnace to gas what type of atmospheric burner can be
used?
A. Burner tray
B. In shot
C. Ribbon burner
,D. Primary air fan assist burner - ANSWER-B
169. What is the normal return air requirements for forced air furnaces?
a) 700
b) 800
c) 900
d) 1000 - ANSWER-C
188. On a regulator, what senses (measures) outlet pressure?
A. Restricting element
B. Measuring element
C. Loading element
D. Spring element - ANSWER-B
192. A propane service regulator would normally deliver pressure at
A. Pound to 11 in. w.c.
B. Ounces to 7 in. w.c.
C. Ounces to 11 in. w.c.
D. Pound to 7 in. w.c. - ANSWER-A
193. What monitors water flow in a pool heater?
A. Aquastat
B. Low water cut off
C. Pressure switch
D. Flow switch - ANSWER-C
197. For a freestanding propane range in a large kitchen, the flexible connector may be
how long?
A. 10 ft.
B. 6 ft
C. 4 ft.
D. 8 ft. if range is in the center of the kitchen - ANSWER-B
198. An inverted sensor (measures water level) can be found operating what type of
appliance?
A. Hot water boiler
B. Steam water boiler
C. Domestic hot water storage tank
D. Domestic potable hot water tank - ANSWER-D
199. What is the ignition temperature for propane gas?
a) 920 degrees Fahrenheit
b) 1200 degrees Fahrenheit
c) 1800 degrees Fahrenheit
d) 3600 degrees Fahrenheit - ANSWER-A
, 199. What would be the input of a 0.60-gph-oil nozzle?
A. 73 MBtu
B. 70 MBtu
C. 84 MBtu (140 000 x .60)
D. 50 MBtu - ANSWER-C
202. What is the ultimate reading of CO2 (carbon dioxide) for natural gas?
A. 9.9%
B. 10.9%
C. 11.9%
D. 13.9% - ANSWER-C
203. What would be the approximate O2 (oxygen) reading?
A. 9.0%
B. 7.0%
C. 5.0%
D. 3.0% - ANSWER-D
211. What is the minimum location from a property line that a pool heater can be
installed?
A. 24 in.
B. 20 in.
C. 18 in.
D. 12 in. - ANSWER-C
222. When converting a furnace, how far above the burner must the flue collar be?
A. 6 in.
B. 8 in.
C. 10 in.
D. 12 in. - ANSWER-D
223. What would be the approximate time for purging a 1-inch NPS pipe at 100-feet?
A. 50 seconds
B. 1 minute
C. 1 minute, 24 seconds
D. 1 minute, 10 seconds - ANSWER-C
226. On a 14 /12 pitch roof, what would be the termination of a 5-inch B-Vent?
A. 4 ft.
B. 5 ft.
C. 6 ft.
D. 10 ft. - ANSWER-B
227. For a 20 horsepower steam boiler, what would be its maximum input in Btu?
A. 200 Mbtu
B. 530 Mbtu
