All g2 prep exams [ACTUAL EXAM]
LATEST VERSION [QUESTIONS AND
ANSWERS] WITH PRACTICE EXAM
DETAILED AND VERIFIED FOR
GUARANTEED PASS- LATEST
UPDATE 2025 GRADED A
1. Underground piping or tubing shall be tested in accordance with the:
A) Appliance manufacturers installation instructions
B) Requirements established by the Ministry or Labour
C) Requirements of the B149. 1 Code
D) Bulletins issues by the local gas distributor - CORRECT ANSWER C
2. What is the allowable maximum distance piping supports should be spaced on a 4
inch horizontal gas line? A) 15 feet
B) 20 feet
C) 25 feet
D) 30 feet - CORRECT ANSWER A
3. What is the required minimum distance a purge line may terminate from either a
building or air intake when purging a piping tubing system to outdoors?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet - CORRECT ANSWER B
4. Schedule 80 piping is required in a propane system:
A) For propane vapour under 125 pisg working pressure
B) When steel piping is to be connected to plastic piping
C) For propane vapour over 125 pisg working pressure
D) When copper piping is to be connected to plastic piping - CORRECT ANSWER
C
5. What is the minimum time and pressure required to test a new welded 3 inch NPS
piping system that is 220 feet long with a supply pressure of 40 psig?
A) 60 minutes at 50 pisg
B) 180 minutes at 60 pisg
,C) 60 minutes at 55 pisg
D) 180 minutes at 50 psig - CORRECT ANSWER B
6. Above ground piping of which size and larger must be welded, unlesss the authority
having jurisdiction allows threaten joints?
A) 1 and 1/4"
B) 1 and 1/2"
C) 2"
D) 2 and 1/2" - CORRECT ANSWER D
7. What size tubing is required to supply propane to a 225,000 Btuh input appliance
when installing 95 feet of copper tubing which will operate at 2 psig with a pressure drop
of 1.0 psig?
A) 0.375" (3/8")
B) 0.500" (1/2")
C) 0.625" (5/8") - CORRECT ANSWER C
8. When is it necessary to purge every branch supply line in a piping system?
A) Never
B) Always
C) Only when the branch supply line size is larger than 1" NPS
D) Only when the branch supply line will be operating at a pressure in excess of 0.5
pisg - CORRECT ANSWER B
9. When sizing a branch line, what is the minimum size of job fabricated welded fitting
that can be used on NPS 6" gas supply header?
A) 1/2" NPS
B) 3/4" NPS
C) 2" NPS
D) 3" NPS - CORRECT ANSWER B
10. Natural gas piping in industrial building shall be identified:
A) With yellow paint or yellow bands
B) With red paint or red bands
C) With paint in a contrasting colour to other piping
D) With green paint or yellow bands - CORRECT ANSWER A
11. When sizing a brand line, what is the maximum size of job fabricated welded fitting
that can be used in a 4" NPS gas supply header?
A) 6" NPS
B) 2" NPS
C) 4" NPS
D) 3" NPS - CORRECT ANSWER B
12. Armoured cable is called"
,A) NMW
B) NMD
C) BX
D) LVT - CORRECT ANSWER C
13. This symbol is a:
A) Normally closed float switch that opens on rise
B) Normally open temperature switch that close on fall
C) Normally open flow switch the closes on flow
D) Normally closed pressure switch that opens on fall - CORRECT ANSWER B
14. This symbol is a:
A) Normally open pressure switch that closes on rise
B) Normally closed temperature switch that opens on fall
C) Normally open flow switch that closes on flow
D) Normally closed humidity switch that opens on fall - CORRECT ANSWER C
15. This symbol is a:
A) Normally closed float switch that opens on rise
B) Normally open temperature switch that closes on fall
C) Normally open flow switch that closes on flow
D) Normally closed pressure switch that opens on fall - CORRECT ANSWER D
16. On an electrical schematic diagram, the safety controls are typically drawn:
A) To the right of the loads
B) Above the loads
C) Below the loads
D) To the left of the loads - CORRECT ANSWER D
17. When a new appliance is to be installed in a building using steel framing and steel
studs and the supply wiring to it will be in contact with the studding. Which of the follow
types or wire is acceptable, and the most cost effective? A) NMW
B) NMD
C) BX
D) LVT - CORRECT ANSWER C
18. Voltmeters are connected:
A) In series with the device being checked
B) In parallel with the device being checked
C) With the system power off
D) In series with the loads only - CORRECT ANSWER B
19. A panel mounted ground fault circuit interrupting breaker protects all:
A) Electrical loads in the circuits from the panel
B) Loads in the circuit served by that breaker
, C) 240 volt circuits served by that breaker panel
D) 120 volt circuits served by that breaker - CORRECT ANSWER B
20. A hard, sharp pilot flame indicates:
A) The orifice is too small
B) There is a lack of air
C) There is excessive draft at the pilot location
D) High gas pressure - CORRECT ANSWER A
21. A good pilot generator should produce what voltage?
A) 750 mV
B) 110 volts
C) 25 ma
D) 150 mV - CORRECT ANSWER A
22. Which of the following statement is correct?
A) Conductors must extend no more than 10 cm (4") into an electrical box
B) A ground wire shall not be used as a neutral wire
C) No more than 3 conductors may be installed under a terminal screw unless
connectors are used D) Aluminum and copper conductors of the same gauge are rated
to carry the same current - CORRECT ANSWER B
23. Which statement is correct?
A) The series-parallel circuit is the most common type of circuit used to gas appliances
B) A corroded switch may cause a parallel circuit to act like a series-parallel circuit
C) The series circuit is the only type of circuit used in heating appliances
D) The parallel circuit is never used in heading appliances - CORRECT ANSWER
A
24. A zero ohmmeter reading tank between the casing of a solenoid and disconnected
wire to the solenoid indicates that:
A) The coil is good
B) The coil is shorted to the casing of the device
C) The coil wire is broken
D) All of the above - CORRECT ANSWER B
25. The instrument used to determine potential difference in an electrical circuit is the:
A) Voltmeter
B) Ohmmeter
C) Ammeter
D) Potentiometer - CORRECT ANSWER A
26. As the diameter of a wire increases the resistance:
A) Increases
B) Decreases
LATEST VERSION [QUESTIONS AND
ANSWERS] WITH PRACTICE EXAM
DETAILED AND VERIFIED FOR
GUARANTEED PASS- LATEST
UPDATE 2025 GRADED A
1. Underground piping or tubing shall be tested in accordance with the:
A) Appliance manufacturers installation instructions
B) Requirements established by the Ministry or Labour
C) Requirements of the B149. 1 Code
D) Bulletins issues by the local gas distributor - CORRECT ANSWER C
2. What is the allowable maximum distance piping supports should be spaced on a 4
inch horizontal gas line? A) 15 feet
B) 20 feet
C) 25 feet
D) 30 feet - CORRECT ANSWER A
3. What is the required minimum distance a purge line may terminate from either a
building or air intake when purging a piping tubing system to outdoors?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet - CORRECT ANSWER B
4. Schedule 80 piping is required in a propane system:
A) For propane vapour under 125 pisg working pressure
B) When steel piping is to be connected to plastic piping
C) For propane vapour over 125 pisg working pressure
D) When copper piping is to be connected to plastic piping - CORRECT ANSWER
C
5. What is the minimum time and pressure required to test a new welded 3 inch NPS
piping system that is 220 feet long with a supply pressure of 40 psig?
A) 60 minutes at 50 pisg
B) 180 minutes at 60 pisg
,C) 60 minutes at 55 pisg
D) 180 minutes at 50 psig - CORRECT ANSWER B
6. Above ground piping of which size and larger must be welded, unlesss the authority
having jurisdiction allows threaten joints?
A) 1 and 1/4"
B) 1 and 1/2"
C) 2"
D) 2 and 1/2" - CORRECT ANSWER D
7. What size tubing is required to supply propane to a 225,000 Btuh input appliance
when installing 95 feet of copper tubing which will operate at 2 psig with a pressure drop
of 1.0 psig?
A) 0.375" (3/8")
B) 0.500" (1/2")
C) 0.625" (5/8") - CORRECT ANSWER C
8. When is it necessary to purge every branch supply line in a piping system?
A) Never
B) Always
C) Only when the branch supply line size is larger than 1" NPS
D) Only when the branch supply line will be operating at a pressure in excess of 0.5
pisg - CORRECT ANSWER B
9. When sizing a branch line, what is the minimum size of job fabricated welded fitting
that can be used on NPS 6" gas supply header?
A) 1/2" NPS
B) 3/4" NPS
C) 2" NPS
D) 3" NPS - CORRECT ANSWER B
10. Natural gas piping in industrial building shall be identified:
A) With yellow paint or yellow bands
B) With red paint or red bands
C) With paint in a contrasting colour to other piping
D) With green paint or yellow bands - CORRECT ANSWER A
11. When sizing a brand line, what is the maximum size of job fabricated welded fitting
that can be used in a 4" NPS gas supply header?
A) 6" NPS
B) 2" NPS
C) 4" NPS
D) 3" NPS - CORRECT ANSWER B
12. Armoured cable is called"
,A) NMW
B) NMD
C) BX
D) LVT - CORRECT ANSWER C
13. This symbol is a:
A) Normally closed float switch that opens on rise
B) Normally open temperature switch that close on fall
C) Normally open flow switch the closes on flow
D) Normally closed pressure switch that opens on fall - CORRECT ANSWER B
14. This symbol is a:
A) Normally open pressure switch that closes on rise
B) Normally closed temperature switch that opens on fall
C) Normally open flow switch that closes on flow
D) Normally closed humidity switch that opens on fall - CORRECT ANSWER C
15. This symbol is a:
A) Normally closed float switch that opens on rise
B) Normally open temperature switch that closes on fall
C) Normally open flow switch that closes on flow
D) Normally closed pressure switch that opens on fall - CORRECT ANSWER D
16. On an electrical schematic diagram, the safety controls are typically drawn:
A) To the right of the loads
B) Above the loads
C) Below the loads
D) To the left of the loads - CORRECT ANSWER D
17. When a new appliance is to be installed in a building using steel framing and steel
studs and the supply wiring to it will be in contact with the studding. Which of the follow
types or wire is acceptable, and the most cost effective? A) NMW
B) NMD
C) BX
D) LVT - CORRECT ANSWER C
18. Voltmeters are connected:
A) In series with the device being checked
B) In parallel with the device being checked
C) With the system power off
D) In series with the loads only - CORRECT ANSWER B
19. A panel mounted ground fault circuit interrupting breaker protects all:
A) Electrical loads in the circuits from the panel
B) Loads in the circuit served by that breaker
, C) 240 volt circuits served by that breaker panel
D) 120 volt circuits served by that breaker - CORRECT ANSWER B
20. A hard, sharp pilot flame indicates:
A) The orifice is too small
B) There is a lack of air
C) There is excessive draft at the pilot location
D) High gas pressure - CORRECT ANSWER A
21. A good pilot generator should produce what voltage?
A) 750 mV
B) 110 volts
C) 25 ma
D) 150 mV - CORRECT ANSWER A
22. Which of the following statement is correct?
A) Conductors must extend no more than 10 cm (4") into an electrical box
B) A ground wire shall not be used as a neutral wire
C) No more than 3 conductors may be installed under a terminal screw unless
connectors are used D) Aluminum and copper conductors of the same gauge are rated
to carry the same current - CORRECT ANSWER B
23. Which statement is correct?
A) The series-parallel circuit is the most common type of circuit used to gas appliances
B) A corroded switch may cause a parallel circuit to act like a series-parallel circuit
C) The series circuit is the only type of circuit used in heating appliances
D) The parallel circuit is never used in heading appliances - CORRECT ANSWER
A
24. A zero ohmmeter reading tank between the casing of a solenoid and disconnected
wire to the solenoid indicates that:
A) The coil is good
B) The coil is shorted to the casing of the device
C) The coil wire is broken
D) All of the above - CORRECT ANSWER B
25. The instrument used to determine potential difference in an electrical circuit is the:
A) Voltmeter
B) Ohmmeter
C) Ammeter
D) Potentiometer - CORRECT ANSWER A
26. As the diameter of a wire increases the resistance:
A) Increases
B) Decreases
