G2 / Gas Technician G2 Exams (Latest 2024/ 2025
Updates STUDY BUNDLE WITH COMPLETE SOLUTIONS)
Questions and Verified Answers| 100% Correct| Grade
A
An inline Ammeter is connected - ANSWERIn series with the device being checked
As the length of an Electrical run increases, it may be necessary to - ANSWERIncrease
the Wire Size
Fuses serving motor circuits should be of - ANSWERTime Delay Type
Millivolt wiring should be isolated from Line Voltage Wiring because - ANSWERThe
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? -
ANSWEROhmmeter
On an Electrical Schematic Diagram, the safety controls are typically drawn: -
ANSWERTo the Left of the Loads
Which of the following types of wire must be used in Damp locations? -
ANSWERNMW
On an Electrical Schematic, all operating controls are drawn: - ANSWERNormally
Open
As the length of a Conductor Increases, the Voltage Drop along the Conductor: -
ANSWERIncreases
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 - ANSWERNMD
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 - ANSWER0-600V
A 120 Volt Power Supply for a residential Electrical Circuit is taken from the: -
ANSWERLoad side of one branch circuit breaker and a Neutral Plug
A receptacle mounted Ground Fault Circuit Interrupted protects against: -
ANSWERCurrent Flow to Ground
An Electrical Pictorial Diagram is used to: - ANSWERShow component location
,When using an Ohmmeter, the most important thing to remember is to: -
ANSWERDe-engerize the Circuit
A zero Ohmmeter reading taken between the casing of a Solenoid and a
disconnected Wire to the Solenoid indicates that - ANSWERThe coil is shorted to the
casing of the device
The instrument used to determine Potential Difference in an Electrical Circuit is the: -
ANSWERVoltmeter
When the Voltage has been determine to be approximately 120 volts, which scale on
an analog meter should be selected for most accuracy? - ANSWER0-250 Volts
The resistance of a Thermistor... as its temperature rises - ANSWERDecreases
A Hot Surface Igniter requires how many volts to operate properly ? - ANSWER115 to
125 VAC
It is permissible to use gas piping as an Electrical Ground if: - ANSWERIt is used in the
Flame Safeguard Circuit
A Thermopile or Powerpile generates: - ANSWERHundreds of Millivolts
How is the Heat Anticipator setting determined for a Thermostat with an adjustable
Anticipator? - ANSWERBy measuring the current drawn by the components in the
circuit being feed directly by the Thermostat
A Fan Control is a: - ANSWERNormally Open Temperature Control that Closes on
Temperature Rise
As the temperature of a Thermistor increases, the Current Flow through it... -
ANSWERIncreases
A Thermostat with a Single Mercury Bulb which controls a Single Stage Heat, Single
Stage Cool unit is a... control - ANSWERSPDT (Single Pole Double Throw)
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 -
ANSWERDPDT (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"? - ANSWERA 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: - ANSWER30% - 50%
From the following list, which action will have the greatest effect on reducing mold
growth in a house? - ANSWERCovering 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? - ANSWERRecommend the installation of a Mechanical Ventilation System
Which is the most common cause of Flue Gas Spillage from gas appliances? -
ANSWERNegative 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 hood. The required combustion air opening size is: - ANSWER9 Square
Inches (5800 mm2)
Air enters a House through a process called... - ANSWERInfiltration
Two Hot Water Boilers each firing at 750,000 BTUH, 1 Water Heater firing at 270,000
BTUH and 1 Water Heater firing at 30,000 BTUH. These appliances are contained in a
room with a cutout and a grill with 80% free area. What size in square inches should
the grill be? - ANSWER250 Square Inches
What is the minimum size of a Combustion Air Opening from outdoors for an
appliance without a Draft Hood and having an input of 125,000 BTUH installed in a
structure that has a continuous Vapour Barrier and has an equivalent leakage area of
0.05 m2 at a differential pressure of 10 parcels and dimensions of 10ft x 10ft x 20ft? -
ANSWER9 Square Inches
What is the minimum size of the combustion air opening from outdoors for an
appliance without a Draft Hood and with an input of 50,000 BTUH installed installed
in a structure which has an equivalent leakage area greater than 0.05 m2 and
dimensions of 10ft x 10ft x 20ft? - ANSWER0 Square Inches
If the Relative Humidity of a room is increased, the Temperature in the room must
be increase to maintain the same level of comfort. - ANSWERFalse
As the number of occupants in a tightly constructed building increases, the: -
ANSWERRelative Humidity Increases
The best way to remove odours from a house is to: - ANSWERVentilate the house
Updates STUDY BUNDLE WITH COMPLETE SOLUTIONS)
Questions and Verified Answers| 100% Correct| Grade
A
An inline Ammeter is connected - ANSWERIn series with the device being checked
As the length of an Electrical run increases, it may be necessary to - ANSWERIncrease
the Wire Size
Fuses serving motor circuits should be of - ANSWERTime Delay Type
Millivolt wiring should be isolated from Line Voltage Wiring because - ANSWERThe
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? -
ANSWEROhmmeter
On an Electrical Schematic Diagram, the safety controls are typically drawn: -
ANSWERTo the Left of the Loads
Which of the following types of wire must be used in Damp locations? -
ANSWERNMW
On an Electrical Schematic, all operating controls are drawn: - ANSWERNormally
Open
As the length of a Conductor Increases, the Voltage Drop along the Conductor: -
ANSWERIncreases
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 - ANSWERNMD
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 - ANSWER0-600V
A 120 Volt Power Supply for a residential Electrical Circuit is taken from the: -
ANSWERLoad side of one branch circuit breaker and a Neutral Plug
A receptacle mounted Ground Fault Circuit Interrupted protects against: -
ANSWERCurrent Flow to Ground
An Electrical Pictorial Diagram is used to: - ANSWERShow component location
,When using an Ohmmeter, the most important thing to remember is to: -
ANSWERDe-engerize the Circuit
A zero Ohmmeter reading taken between the casing of a Solenoid and a
disconnected Wire to the Solenoid indicates that - ANSWERThe coil is shorted to the
casing of the device
The instrument used to determine Potential Difference in an Electrical Circuit is the: -
ANSWERVoltmeter
When the Voltage has been determine to be approximately 120 volts, which scale on
an analog meter should be selected for most accuracy? - ANSWER0-250 Volts
The resistance of a Thermistor... as its temperature rises - ANSWERDecreases
A Hot Surface Igniter requires how many volts to operate properly ? - ANSWER115 to
125 VAC
It is permissible to use gas piping as an Electrical Ground if: - ANSWERIt is used in the
Flame Safeguard Circuit
A Thermopile or Powerpile generates: - ANSWERHundreds of Millivolts
How is the Heat Anticipator setting determined for a Thermostat with an adjustable
Anticipator? - ANSWERBy measuring the current drawn by the components in the
circuit being feed directly by the Thermostat
A Fan Control is a: - ANSWERNormally Open Temperature Control that Closes on
Temperature Rise
As the temperature of a Thermistor increases, the Current Flow through it... -
ANSWERIncreases
A Thermostat with a Single Mercury Bulb which controls a Single Stage Heat, Single
Stage Cool unit is a... control - ANSWERSPDT (Single Pole Double Throw)
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 -
ANSWERDPDT (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"? - ANSWERA 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: - ANSWER30% - 50%
From the following list, which action will have the greatest effect on reducing mold
growth in a house? - ANSWERCovering 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? - ANSWERRecommend the installation of a Mechanical Ventilation System
Which is the most common cause of Flue Gas Spillage from gas appliances? -
ANSWERNegative 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 hood. The required combustion air opening size is: - ANSWER9 Square
Inches (5800 mm2)
Air enters a House through a process called... - ANSWERInfiltration
Two Hot Water Boilers each firing at 750,000 BTUH, 1 Water Heater firing at 270,000
BTUH and 1 Water Heater firing at 30,000 BTUH. These appliances are contained in a
room with a cutout and a grill with 80% free area. What size in square inches should
the grill be? - ANSWER250 Square Inches
What is the minimum size of a Combustion Air Opening from outdoors for an
appliance without a Draft Hood and having an input of 125,000 BTUH installed in a
structure that has a continuous Vapour Barrier and has an equivalent leakage area of
0.05 m2 at a differential pressure of 10 parcels and dimensions of 10ft x 10ft x 20ft? -
ANSWER9 Square Inches
What is the minimum size of the combustion air opening from outdoors for an
appliance without a Draft Hood and with an input of 50,000 BTUH installed installed
in a structure which has an equivalent leakage area greater than 0.05 m2 and
dimensions of 10ft x 10ft x 20ft? - ANSWER0 Square Inches
If the Relative Humidity of a room is increased, the Temperature in the room must
be increase to maintain the same level of comfort. - ANSWERFalse
As the number of occupants in a tightly constructed building increases, the: -
ANSWERRelative Humidity Increases
The best way to remove odours from a house is to: - ANSWERVentilate the house
