G2 PREP TEST COMPREHENSIVE SCRIPT 2026
QUESTIONS AND ANSWERS GUARANTEED TO
PASS
◉ The incoming power supply to residential buildings is... Answer:
240/1/60
◉ When using ohmmeter, the most important thing to remember is
to... Answer: Isolate the circuit
◉ As the gauge number of the conductor increases, it's carrying
capacity... Answer: Decreases
◉ A hard, sharp flame may indicate that: Answer: the orifice is too
small
◉ How much of a thermopile must be covered by the pilot flame?
Answer: 3/8" - 1/2"
◉ What voltage would you expect to see from a good thermopile!
Answer: 750 mvdc
◉ What is a good dropout reading on a thermopile? Answer: 2-4 mv
,◉ If the heat anticipator of a thermostat is set to low what probable
condition would exist when the heating unit is operating? Answer:
Short cycle main burner
◉ The key components of a building as a system are... Answer:
Building envelope
Mechanical system
Occupants
External environment
◉ Vapour barriers should be installed on Answer: The warm side of
the insulation
◉ The type of heat transference associated with a forced air heating
system is... Answer: Convective
◉ The process of air entering the house is... Answer: Infiltration
◉ Combustion air size Answer: Clause 8.2.1
◉ Combustion Air Charts Answer: Table 8.1 (tight w/draft hood)
Table 8.2 (tight w/fan or both)
, Table 8.3 (Loose w/draft hood)
Table 8.4 (Loose w/fan or both)
◉ What is the minimum height above grade level for an outdoor air
supply opening? Answer: 12 inches
◉ Find combustion air for a power burner. Answer: 1 in.² for each
30,000 BTUH
◉ When the electrical power to the glow-sil ignition burner is
interrupted for any reason and then restored, reignition cannot
occur until the... Answer: radiant sensor switch resets
◉ Air Supply Requirements Answer: Clause 8.4.2
Clause 8.4.3
◉ At what temperature does a radiant sensor open in a residential
gas dryer using a glo-sim ignition system? Answer: 2200F
◉ When does ignition take place in the glo-sil system after voltage is
applied to the glo-sim? Answer: 15-30 seconds
◉ A Therm-o-disk operating the door locking mechanism in a self
cleaning oven activates at... Answer: 400F
QUESTIONS AND ANSWERS GUARANTEED TO
PASS
◉ The incoming power supply to residential buildings is... Answer:
240/1/60
◉ When using ohmmeter, the most important thing to remember is
to... Answer: Isolate the circuit
◉ As the gauge number of the conductor increases, it's carrying
capacity... Answer: Decreases
◉ A hard, sharp flame may indicate that: Answer: the orifice is too
small
◉ How much of a thermopile must be covered by the pilot flame?
Answer: 3/8" - 1/2"
◉ What voltage would you expect to see from a good thermopile!
Answer: 750 mvdc
◉ What is a good dropout reading on a thermopile? Answer: 2-4 mv
,◉ If the heat anticipator of a thermostat is set to low what probable
condition would exist when the heating unit is operating? Answer:
Short cycle main burner
◉ The key components of a building as a system are... Answer:
Building envelope
Mechanical system
Occupants
External environment
◉ Vapour barriers should be installed on Answer: The warm side of
the insulation
◉ The type of heat transference associated with a forced air heating
system is... Answer: Convective
◉ The process of air entering the house is... Answer: Infiltration
◉ Combustion air size Answer: Clause 8.2.1
◉ Combustion Air Charts Answer: Table 8.1 (tight w/draft hood)
Table 8.2 (tight w/fan or both)
, Table 8.3 (Loose w/draft hood)
Table 8.4 (Loose w/fan or both)
◉ What is the minimum height above grade level for an outdoor air
supply opening? Answer: 12 inches
◉ Find combustion air for a power burner. Answer: 1 in.² for each
30,000 BTUH
◉ When the electrical power to the glow-sil ignition burner is
interrupted for any reason and then restored, reignition cannot
occur until the... Answer: radiant sensor switch resets
◉ Air Supply Requirements Answer: Clause 8.4.2
Clause 8.4.3
◉ At what temperature does a radiant sensor open in a residential
gas dryer using a glo-sim ignition system? Answer: 2200F
◉ When does ignition take place in the glo-sil system after voltage is
applied to the glo-sim? Answer: 15-30 seconds
◉ A Therm-o-disk operating the door locking mechanism in a self
cleaning oven activates at... Answer: 400F
