g2 exam
Study online at https://quizlet.com/_82pe0h
1. Relative humidity is defined as? The percentage of mois-
ture that the quantity of
air is holding in relation to
how much it can hold
2. A certified hose can be used to connect a construction When 1/4 turn level type
heater to a gas piping system for temporary use when? shut off is installed up-
stream of the hose
3. What is the minimum amount of insulation required 2/3
behind the vapour barrier?
4. The vent connector and common vent of a water 9 feet
heater and furnace are tied together with a "Y" fitting
before entering the chimney. Note the information
below and answer the question that follows.
Chimney - H= 25'
Furnace - 100,000 Btuh
Single wall vent
Mid-efficiency with induced draft blower
Water Heater - 45,000 Btuh
Single wall vent
Draft diverter
Home - 25 years old
No sealed vapour barrier
Has range hood, bathroom fan and fireplace
Volume =4,000 cubic feet
What is the maximum lateral length of the common
1/9
, g2 exam
Study online at https://quizlet.com/_82pe0h
vent lateral?
Incorrect Response
6 feet
5. Fan assist burners will: Overcome the resistance
of the burner only
6. When twinning two domestic water heaters: The supply and discharge
piping must be identical in
length and resistance
7. Which type of venting system may be used on a fire- Certified chimney liner
place insert?
8. A low gas pressure switch must interrupt the flow of When the pressure drops
gas when? more than 50% of the
proper supply pressure
9. What is the effect on the refrigeration cycle, when the No refrigeration affect
flame on a gas fired refrigerator is at the lowest or
minimum setting?
10. What is the minimum distance above grade level a 12"
dryer vent can terminate?
11. What is the preferred material for moisture exhaust Rigid metal
duct for a gas dryer?
12. What is the purpose of the water reducing valve? To reduce the incoming
make up water to the boil-
er to 12 PSI from city water
pressure
2/9
Study online at https://quizlet.com/_82pe0h
1. Relative humidity is defined as? The percentage of mois-
ture that the quantity of
air is holding in relation to
how much it can hold
2. A certified hose can be used to connect a construction When 1/4 turn level type
heater to a gas piping system for temporary use when? shut off is installed up-
stream of the hose
3. What is the minimum amount of insulation required 2/3
behind the vapour barrier?
4. The vent connector and common vent of a water 9 feet
heater and furnace are tied together with a "Y" fitting
before entering the chimney. Note the information
below and answer the question that follows.
Chimney - H= 25'
Furnace - 100,000 Btuh
Single wall vent
Mid-efficiency with induced draft blower
Water Heater - 45,000 Btuh
Single wall vent
Draft diverter
Home - 25 years old
No sealed vapour barrier
Has range hood, bathroom fan and fireplace
Volume =4,000 cubic feet
What is the maximum lateral length of the common
1/9
, g2 exam
Study online at https://quizlet.com/_82pe0h
vent lateral?
Incorrect Response
6 feet
5. Fan assist burners will: Overcome the resistance
of the burner only
6. When twinning two domestic water heaters: The supply and discharge
piping must be identical in
length and resistance
7. Which type of venting system may be used on a fire- Certified chimney liner
place insert?
8. A low gas pressure switch must interrupt the flow of When the pressure drops
gas when? more than 50% of the
proper supply pressure
9. What is the effect on the refrigeration cycle, when the No refrigeration affect
flame on a gas fired refrigerator is at the lowest or
minimum setting?
10. What is the minimum distance above grade level a 12"
dryer vent can terminate?
11. What is the preferred material for moisture exhaust Rigid metal
duct for a gas dryer?
12. What is the purpose of the water reducing valve? To reduce the incoming
make up water to the boil-
er to 12 PSI from city water
pressure
2/9
