G2 EXAM PREP 90 QUESTIONS & CORRECT
ANSWERS LATEST 2025
Thermocouple closed circuit should read
A. 120v
B. 240v
C.20-30mv
D. 10-15mv - ANSWER-D. 10-15mv
what type of burner used when doing a conversion from one fuel to another -
ANSWER-Inshot burner
a natural draft burner of the revertible flue type shall not be converted unless -
ANSWER-the centreline of the flue collar is atleast 12in (300mm) above the
burner port
a mechanical device such as a fan or blower that is designed at sufficient pressure
to overcome the resistance of the burner only, would be referred to as: -
ANSWER-fan-assisted burner
two unwanted products of incomplete combustion are: - ANSWER-carbon
monoxide and aldehydes
,boiler clearance from combustible materials from the front - ANSWER-48in
(1200mm)
vent connector clearance is 18in from combustible material with no protetion,
what provisions must be made if the clearance needs to be reduced by 9in -
ANSWER-no.28MSG metal spaced 1in apart with non combustible spacers
what happens if the neautral pressure point for a conversion burner is improperly
adjusted - ANSWER-efficiency of the equipment is affected
on a converted warm air furnace the high limit setting would be - ANSWER-120c
(250f)
Dilution air can be defined as?
a.
Additional air that is added to the combustion zone
b.
Air that surrounds the flame and completes combustion
c.
Room air that enters and mixes with the flue gas at the draft regulator
d.
Air that is always pre-mixed before ignition - ANSWER-C.
, Air temperature that is found upstream of a draft hood is said to be:
A. dilution air temperature
B. ambient air temperature
C. supply air temperature
D. Gross stack temperature air temperature - ANSWER-D.
What name is given to a device which controls gas pressure to the main burner,
the temperature of water, and turns off the gas when the pilot goes out?
A. Low water cutoff
B. E.C.O
C. Unitrol
D. Pressuretrol - ANSWER-Unitrol
What name is given to a water heater that is allowed to be installed in a
bathroom?
A. High efficiency water heater
B. Power vented water heater
C. Conventional Water heater
D. Direct Vent water heater - ANSWER-D. DIrect vent water heater
A vent from a 65,000 BTU power vented water heater shall not be terminated less
than ________ from the ground level?
a.
ANSWERS LATEST 2025
Thermocouple closed circuit should read
A. 120v
B. 240v
C.20-30mv
D. 10-15mv - ANSWER-D. 10-15mv
what type of burner used when doing a conversion from one fuel to another -
ANSWER-Inshot burner
a natural draft burner of the revertible flue type shall not be converted unless -
ANSWER-the centreline of the flue collar is atleast 12in (300mm) above the
burner port
a mechanical device such as a fan or blower that is designed at sufficient pressure
to overcome the resistance of the burner only, would be referred to as: -
ANSWER-fan-assisted burner
two unwanted products of incomplete combustion are: - ANSWER-carbon
monoxide and aldehydes
,boiler clearance from combustible materials from the front - ANSWER-48in
(1200mm)
vent connector clearance is 18in from combustible material with no protetion,
what provisions must be made if the clearance needs to be reduced by 9in -
ANSWER-no.28MSG metal spaced 1in apart with non combustible spacers
what happens if the neautral pressure point for a conversion burner is improperly
adjusted - ANSWER-efficiency of the equipment is affected
on a converted warm air furnace the high limit setting would be - ANSWER-120c
(250f)
Dilution air can be defined as?
a.
Additional air that is added to the combustion zone
b.
Air that surrounds the flame and completes combustion
c.
Room air that enters and mixes with the flue gas at the draft regulator
d.
Air that is always pre-mixed before ignition - ANSWER-C.
, Air temperature that is found upstream of a draft hood is said to be:
A. dilution air temperature
B. ambient air temperature
C. supply air temperature
D. Gross stack temperature air temperature - ANSWER-D.
What name is given to a device which controls gas pressure to the main burner,
the temperature of water, and turns off the gas when the pilot goes out?
A. Low water cutoff
B. E.C.O
C. Unitrol
D. Pressuretrol - ANSWER-Unitrol
What name is given to a water heater that is allowed to be installed in a
bathroom?
A. High efficiency water heater
B. Power vented water heater
C. Conventional Water heater
D. Direct Vent water heater - ANSWER-D. DIrect vent water heater
A vent from a 65,000 BTU power vented water heater shall not be terminated less
than ________ from the ground level?
a.
