2g Architecture 2022 EXAM
1) What is the minimum diameter of a pressure gauge needed to perform leak test on gas piping?
A. 2"
B. 2 - 3/4"
C. 3"
D. 3 - 1/2"
Correct Answer: C. 3"
2) Amp meter can read what?
A. Pressure drop.
B. Conductor magnetic field.
C. Load in parallel wires.
D. Direct power across loads.
Correct Answer: B. Conductor magnetic field.
3) What would be the primary voltage of a furnace?
A. 120/2/60.
B. 24/1/60.
C. 120/24/60.
D. 120/1/60.
Correct Answer: D. 120/1/60.
4) What is the function of an intermittent pilot?
A. Stay on after main burner shuts off.
B. Stay on before and after main burner.
C. Power up the thermocouple.
D. Stay on during the main burner operation.
Correct Answer: D. Stay on during the main burner operation.
5) What is the millivolts power output on a thermocouple closed circuit test?
A. 20 to 30 millivolts.
B. 10 to 15 millivolts.
C. 2 to 4 millivolts.
D. 10 millivolts or less.
Correct Answer: B. 10 to 15 millivolts.
6) A pilot with a lazy yellow flame would indicate?
A. Orifice too small.
B. Gas pressure is too high.
,C. Gas pressure is too low.
D. Orifice size too large. Correct Answer: D. Orifice size too large.
7) For flame rectification one of the most important things should be?
A. Flame molecules.
B. Proper grounding plane.
C. Proper air to gas mixture to pilot.
D. Flame rod insulator. Correct Answer: B. Proper grounding plane.
8) What makes a flame capillary sensor tube prove pilot to main gas valve?
A. Trial for ignition.
B. Glow coil.
C. Pilot flame.
D. Intermittent pilot. Correct Answer: C. Pilot flame.
9) Since 1996 the most common type of home construction?
A. Platform.
B. Vapour envelope.
C. Solid bricks.
D. Double platform. Correct Answer: A. Platform.
10) Can a new installation of a fin type pool heater less than 250,000 btu be installed in a house?
A. Yes, if gas piping can support gas input.
B. No.
C. Yes, if pool heater is direct vented.
D. Yes, if poll heater is close to chimney. Correct Answer: C. Yes, if pool heater is direct vented.
11) When converting oil furnace to gas what type of atmospheric burner can be use?
A. Burner tray.
B. Inshot.
C. Ribbon burner.
D. Primary air fan assist burner. Correct Answer: B. Inshot.
12) If the flue gases are remove from the front of the appliance we could assume that it's a?
A. 1 to 3 flue pasts boiler.
B. 2 to 6 flue pasts boiler.
C. 2 to5 flue pasts boiler.
D. 2 to 4 flue pasts boiler. Correct Answer: D. 2 to 4 flue pasts boiler.
13) Can a gas log set be installed in sleeping quarters?
A. Yes, if proper air supply is added.
,B. Yes, if the venting is over sized.
C. Yes, if approved by the manufacturer. See clause 7.24.4(c).
D. Yes, only if it a bed sitting room. Correct Answer: C. Yes, if approved by the manufacturer. See clause
7.24.4(c).
14) What is the minimum distance that a vent from an appliance with an input of 110,000 btuh can be
from a non-mechanical air supply?
A. 1ft
B. 2ft
C. 3ft
D. 6th Correct Answer: C. 3ft
15) If the boiler flue gases are remove from the front of the appliance we could assume that it's a?
A. 1 to 3 flue pass boiler.
B. 2 to 6 flue pass boiler.
C. 2 to5 flue pass boiler.
D. 2 to 4 flue pass boiler. Correct Answer: D. 2 to 4 flue pass boiler.
16) Can a gas log fire place be installed in a sleeping quarter?
A. Yes, if proper air supply is added.
B. Yes, if the venting is over sized.
C. No, even if new venting is installed.
D. Yes, only if it a bed sitting room. Correct Answer: C. No, even if new venting is installed.
17) What is the minimum distance that a vent from an appliance with an input of 101,000 btuh be from
a non-mechanical air supply?
A. 1ft
B. 2ft
C. 3ft
D. 6th Correct Answer: C. 3ft
18) On a presssuretol, the main burner starts on?
A. Pressure rise.
B. Water level.
C. Pressure differential.
D. Steam system output. Correct Answer: C. Pressure differential.
19) On a hydronic heater system what control respond to a load change?
A. Low water cut off.
B. Expansion tank.
C. Flow switch.
D. Aquastat. Correct Answer: D. Aquastat.
, 20) Installation of a propane tank under 1000 USWG what would be the minimum distance from a
regulator to a building opening?
A. 30'
B. 15'
C. 10'
D. 3' Correct Answer: D. 3'
21) If an appliance is less than 85% efficient and non positive it would be considered a?
A. Category 2
B. Category 1
C. Category 4
D. Category 3 Correct Answer: A. Category 2
22) For a steam boiler what would be the most important safety control?
A. Flame scanner.
B. Flame roll out switch.
C. Low water cut off.
D. High limit steam lock out control. Correct Answer: C. Low water cut off.
23) For a low pressure steam boiler what would be the maximum steam pressure setting?
A. 30psi
B. 25psi
C. 10psi
D. 15psi Correct Answer: D. 15psi
24) What would be the minimum distance from a gas meter a dryer vent should terminate?
A. 3'
B. 6'
C. 1'
D. 10' Correct Answer: A. 3'
25) A appliance draft hood ensures?
A. Over positive draft.
B. Under negative draft.
C. Zero over fire draft.
D. Combustion air flow. Correct Answer: C. Zero over fire draft.
26) Proper wiring of an electronic air cleaner is?
A. Parallel with gas valve.
B. Series with fan assist burner.
1) What is the minimum diameter of a pressure gauge needed to perform leak test on gas piping?
A. 2"
B. 2 - 3/4"
C. 3"
D. 3 - 1/2"
Correct Answer: C. 3"
2) Amp meter can read what?
A. Pressure drop.
B. Conductor magnetic field.
C. Load in parallel wires.
D. Direct power across loads.
Correct Answer: B. Conductor magnetic field.
3) What would be the primary voltage of a furnace?
A. 120/2/60.
B. 24/1/60.
C. 120/24/60.
D. 120/1/60.
Correct Answer: D. 120/1/60.
4) What is the function of an intermittent pilot?
A. Stay on after main burner shuts off.
B. Stay on before and after main burner.
C. Power up the thermocouple.
D. Stay on during the main burner operation.
Correct Answer: D. Stay on during the main burner operation.
5) What is the millivolts power output on a thermocouple closed circuit test?
A. 20 to 30 millivolts.
B. 10 to 15 millivolts.
C. 2 to 4 millivolts.
D. 10 millivolts or less.
Correct Answer: B. 10 to 15 millivolts.
6) A pilot with a lazy yellow flame would indicate?
A. Orifice too small.
B. Gas pressure is too high.
,C. Gas pressure is too low.
D. Orifice size too large. Correct Answer: D. Orifice size too large.
7) For flame rectification one of the most important things should be?
A. Flame molecules.
B. Proper grounding plane.
C. Proper air to gas mixture to pilot.
D. Flame rod insulator. Correct Answer: B. Proper grounding plane.
8) What makes a flame capillary sensor tube prove pilot to main gas valve?
A. Trial for ignition.
B. Glow coil.
C. Pilot flame.
D. Intermittent pilot. Correct Answer: C. Pilot flame.
9) Since 1996 the most common type of home construction?
A. Platform.
B. Vapour envelope.
C. Solid bricks.
D. Double platform. Correct Answer: A. Platform.
10) Can a new installation of a fin type pool heater less than 250,000 btu be installed in a house?
A. Yes, if gas piping can support gas input.
B. No.
C. Yes, if pool heater is direct vented.
D. Yes, if poll heater is close to chimney. Correct Answer: C. Yes, if pool heater is direct vented.
11) When converting oil furnace to gas what type of atmospheric burner can be use?
A. Burner tray.
B. Inshot.
C. Ribbon burner.
D. Primary air fan assist burner. Correct Answer: B. Inshot.
12) If the flue gases are remove from the front of the appliance we could assume that it's a?
A. 1 to 3 flue pasts boiler.
B. 2 to 6 flue pasts boiler.
C. 2 to5 flue pasts boiler.
D. 2 to 4 flue pasts boiler. Correct Answer: D. 2 to 4 flue pasts boiler.
13) Can a gas log set be installed in sleeping quarters?
A. Yes, if proper air supply is added.
,B. Yes, if the venting is over sized.
C. Yes, if approved by the manufacturer. See clause 7.24.4(c).
D. Yes, only if it a bed sitting room. Correct Answer: C. Yes, if approved by the manufacturer. See clause
7.24.4(c).
14) What is the minimum distance that a vent from an appliance with an input of 110,000 btuh can be
from a non-mechanical air supply?
A. 1ft
B. 2ft
C. 3ft
D. 6th Correct Answer: C. 3ft
15) If the boiler flue gases are remove from the front of the appliance we could assume that it's a?
A. 1 to 3 flue pass boiler.
B. 2 to 6 flue pass boiler.
C. 2 to5 flue pass boiler.
D. 2 to 4 flue pass boiler. Correct Answer: D. 2 to 4 flue pass boiler.
16) Can a gas log fire place be installed in a sleeping quarter?
A. Yes, if proper air supply is added.
B. Yes, if the venting is over sized.
C. No, even if new venting is installed.
D. Yes, only if it a bed sitting room. Correct Answer: C. No, even if new venting is installed.
17) What is the minimum distance that a vent from an appliance with an input of 101,000 btuh be from
a non-mechanical air supply?
A. 1ft
B. 2ft
C. 3ft
D. 6th Correct Answer: C. 3ft
18) On a presssuretol, the main burner starts on?
A. Pressure rise.
B. Water level.
C. Pressure differential.
D. Steam system output. Correct Answer: C. Pressure differential.
19) On a hydronic heater system what control respond to a load change?
A. Low water cut off.
B. Expansion tank.
C. Flow switch.
D. Aquastat. Correct Answer: D. Aquastat.
, 20) Installation of a propane tank under 1000 USWG what would be the minimum distance from a
regulator to a building opening?
A. 30'
B. 15'
C. 10'
D. 3' Correct Answer: D. 3'
21) If an appliance is less than 85% efficient and non positive it would be considered a?
A. Category 2
B. Category 1
C. Category 4
D. Category 3 Correct Answer: A. Category 2
22) For a steam boiler what would be the most important safety control?
A. Flame scanner.
B. Flame roll out switch.
C. Low water cut off.
D. High limit steam lock out control. Correct Answer: C. Low water cut off.
23) For a low pressure steam boiler what would be the maximum steam pressure setting?
A. 30psi
B. 25psi
C. 10psi
D. 15psi Correct Answer: D. 15psi
24) What would be the minimum distance from a gas meter a dryer vent should terminate?
A. 3'
B. 6'
C. 1'
D. 10' Correct Answer: A. 3'
25) A appliance draft hood ensures?
A. Over positive draft.
B. Under negative draft.
C. Zero over fire draft.
D. Combustion air flow. Correct Answer: C. Zero over fire draft.
26) Proper wiring of an electronic air cleaner is?
A. Parallel with gas valve.
B. Series with fan assist burner.
