GAS TECHNICIAN G2 LICENSE
EXAM 2025 QUESTIONS AND
ANSWERS
An inline Ammeter is connected - ....ANSWER ...-In series with the device being
checked
As the length of an Electrical run increases, it may be necessary to -
....ANSWER ...-Increase the Wire Size
Fuses serving motor circuits should be of - ....ANSWER ...-Time Delay Type
Millivolt wiring should be isolated from Line Voltage Wiring because -
....ANSWER ...-The Line Voltage will induce a voltage into the Millivolt Wiring
Which tool is used to determine if the windings on an Electric Motor have shorted? -
....ANSWER ...-Ohmmeter
On an Electrical Schematic Diagram, the safety controls are typically drawn: -
....ANSWER ...-To the Left of the Loads
Which of the following types of wire must be used in Damp locations? -
....ANSWER ...-NMW
...©️ 2025, ALL RIGHTS RESERVED 1
,On an Electrical Schematic, all operating controls are drawn: - ....ANSWER ...-
Normally Open
As the length of a Conductor Increases, the Voltage Drop along the Conductor: -
....ANSWER ...-Increases
When a new appliance is to be installed in a typical residential basement and the Supply
Wiring to it is concealed, which of the following types of wire is acceptable, and most
cost effective - ....ANSWER ...-NMD
When checking a circuit of unknown Voltage using an analog meter with 0-30V, 0-125V,
0-250V, and 0-600V, which scale should be selected - ....ANSWER ...-0-600V
A 120 Volt Power Supply for a residential Electrical Circuit is taken from the: -
....ANSWER ...-Load side of one branch circuit breaker and a Neutral Plug
A receptacle mounted Ground Fault Circuit Interrupted protects against: -
....ANSWER ...-Current Flow to Ground
An Electrical Pictorial Diagram is used to: - ....ANSWER ...-Show component
location
When using an Ohmmeter, the most important thing to remember is to: -
....ANSWER ...-De-engerize the Circuit
A zero Ohmmeter reading taken between the casing of a Solenoid and a disconnected
Wire to the Solenoid indicates that - ....ANSWER ...-The coil is shorted to the
casing of the device
...©️ 2025, ALL RIGHTS RESERVED 2
,The instrument used to determine Potential Difference in an Electrical Circuit is the: -
....ANSWER ...-Voltmeter
When the Voltage has been determine to be approximately 120 volts, which scale on an
analog meter should be selected for most accuracy? - ....ANSWER ...-0-250 Volts
The resistance of a Thermistor... as its temperature rises - ....ANSWER ...-
Decreases
A Hot Surface Igniter requires how many volts to operate properly ? -
....ANSWER ...-115 to 125 VAC
It is permissible to use gas piping as an Electrical Ground if: - ....ANSWER ...-It is
used in the Flame Safeguard Circuit
A Thermopile or Powerpile generates: - ....ANSWER ...-Hundreds of Millivolts
How is the Heat Anticipator setting determined for a Thermostat with an adjustable
Anticipator? - ....ANSWER ...-By measuring the current drawn by the components
in the circuit being feed directly by the Thermostat
A Fan Control is a: - ....ANSWER ...-Normally Open Temperature Control that
Closes on Temperature Rise
As the temperature of a Thermistor increases, the Current Flow through it... -
....ANSWER ...-Increases
A Thermostat with a Single Mercury Bulb which controls a Single Stage Heat, Single
Stage Cool unit is a... control - ....ANSWER ...-SPDT (Single Pole Double Throw)
...©️ 2025, ALL RIGHTS RESERVED 3
, A Thermostat serving a unit which has separate Heating and Cooling Control
transformers and has One Stage of Heating and One Stage of Cooling is a... control -
....ANSWER ...-DPDT (Double Pole Double Throw)
Separate Heating and Cooling, therefore Double Pole and Double Stage for Heating and
Cooling therefore Double Throw. Which of the following heating systems would be
expected to cause problems due to the "Distribution Effect"? - ....ANSWER ...-A
Forced Air Furnace with a return air opening in the furnace room
The recommended range of Relative Humidity in a house to control Indoor Air
Contaminates, increase comfort, and maintain the structural integrity of the house is: -
....ANSWER ...-30% - 50%
From the following list, which action will have the greatest effect on reducing mold
growth in a house? - ....ANSWER ...-Covering earthen floors and open water
surfaces (stumps, aquariums etc.) Open stumps and earth floors and will introduce a ton
of humidity into the house
After a Direct Vent Radiant Heating System is installed in a new house, the customer
complains that, "The Walls and Windows are wet". What is the most reasonable
response? - ....ANSWER ...-Recommend the installation of a Mechanical
Ventilation System
Which is the most common cause of Flue Gas Spillage from gas appliances? -
....ANSWER ...-Negative Air Pressure caused by Mechanical Systems
There are two appliances in a 10ft x 10ft x 20ft structure which has an equivalent leakage
area greater than 0.05 square meters. A furnace has a draft hood and input of 50,000
BTUH. The second appliance has an input of 75,000 BTUH, and does not have a draft
...©️ 2025, ALL RIGHTS RESERVED 4
EXAM 2025 QUESTIONS AND
ANSWERS
An inline Ammeter is connected - ....ANSWER ...-In series with the device being
checked
As the length of an Electrical run increases, it may be necessary to -
....ANSWER ...-Increase the Wire Size
Fuses serving motor circuits should be of - ....ANSWER ...-Time Delay Type
Millivolt wiring should be isolated from Line Voltage Wiring because -
....ANSWER ...-The Line Voltage will induce a voltage into the Millivolt Wiring
Which tool is used to determine if the windings on an Electric Motor have shorted? -
....ANSWER ...-Ohmmeter
On an Electrical Schematic Diagram, the safety controls are typically drawn: -
....ANSWER ...-To the Left of the Loads
Which of the following types of wire must be used in Damp locations? -
....ANSWER ...-NMW
...©️ 2025, ALL RIGHTS RESERVED 1
,On an Electrical Schematic, all operating controls are drawn: - ....ANSWER ...-
Normally Open
As the length of a Conductor Increases, the Voltage Drop along the Conductor: -
....ANSWER ...-Increases
When a new appliance is to be installed in a typical residential basement and the Supply
Wiring to it is concealed, which of the following types of wire is acceptable, and most
cost effective - ....ANSWER ...-NMD
When checking a circuit of unknown Voltage using an analog meter with 0-30V, 0-125V,
0-250V, and 0-600V, which scale should be selected - ....ANSWER ...-0-600V
A 120 Volt Power Supply for a residential Electrical Circuit is taken from the: -
....ANSWER ...-Load side of one branch circuit breaker and a Neutral Plug
A receptacle mounted Ground Fault Circuit Interrupted protects against: -
....ANSWER ...-Current Flow to Ground
An Electrical Pictorial Diagram is used to: - ....ANSWER ...-Show component
location
When using an Ohmmeter, the most important thing to remember is to: -
....ANSWER ...-De-engerize the Circuit
A zero Ohmmeter reading taken between the casing of a Solenoid and a disconnected
Wire to the Solenoid indicates that - ....ANSWER ...-The coil is shorted to the
casing of the device
...©️ 2025, ALL RIGHTS RESERVED 2
,The instrument used to determine Potential Difference in an Electrical Circuit is the: -
....ANSWER ...-Voltmeter
When the Voltage has been determine to be approximately 120 volts, which scale on an
analog meter should be selected for most accuracy? - ....ANSWER ...-0-250 Volts
The resistance of a Thermistor... as its temperature rises - ....ANSWER ...-
Decreases
A Hot Surface Igniter requires how many volts to operate properly ? -
....ANSWER ...-115 to 125 VAC
It is permissible to use gas piping as an Electrical Ground if: - ....ANSWER ...-It is
used in the Flame Safeguard Circuit
A Thermopile or Powerpile generates: - ....ANSWER ...-Hundreds of Millivolts
How is the Heat Anticipator setting determined for a Thermostat with an adjustable
Anticipator? - ....ANSWER ...-By measuring the current drawn by the components
in the circuit being feed directly by the Thermostat
A Fan Control is a: - ....ANSWER ...-Normally Open Temperature Control that
Closes on Temperature Rise
As the temperature of a Thermistor increases, the Current Flow through it... -
....ANSWER ...-Increases
A Thermostat with a Single Mercury Bulb which controls a Single Stage Heat, Single
Stage Cool unit is a... control - ....ANSWER ...-SPDT (Single Pole Double Throw)
...©️ 2025, ALL RIGHTS RESERVED 3
, A Thermostat serving a unit which has separate Heating and Cooling Control
transformers and has One Stage of Heating and One Stage of Cooling is a... control -
....ANSWER ...-DPDT (Double Pole Double Throw)
Separate Heating and Cooling, therefore Double Pole and Double Stage for Heating and
Cooling therefore Double Throw. Which of the following heating systems would be
expected to cause problems due to the "Distribution Effect"? - ....ANSWER ...-A
Forced Air Furnace with a return air opening in the furnace room
The recommended range of Relative Humidity in a house to control Indoor Air
Contaminates, increase comfort, and maintain the structural integrity of the house is: -
....ANSWER ...-30% - 50%
From the following list, which action will have the greatest effect on reducing mold
growth in a house? - ....ANSWER ...-Covering earthen floors and open water
surfaces (stumps, aquariums etc.) Open stumps and earth floors and will introduce a ton
of humidity into the house
After a Direct Vent Radiant Heating System is installed in a new house, the customer
complains that, "The Walls and Windows are wet". What is the most reasonable
response? - ....ANSWER ...-Recommend the installation of a Mechanical
Ventilation System
Which is the most common cause of Flue Gas Spillage from gas appliances? -
....ANSWER ...-Negative Air Pressure caused by Mechanical Systems
There are two appliances in a 10ft x 10ft x 20ft structure which has an equivalent leakage
area greater than 0.05 square meters. A furnace has a draft hood and input of 50,000
BTUH. The second appliance has an input of 75,000 BTUH, and does not have a draft
...©️ 2025, ALL RIGHTS RESERVED 4
