G2 EXAM PREPARATION VERSION 2
G2 EXAM PREPARATION VERSION 2 NEWEST 2025/2026
COMPLETE 300 QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND NEW VERSION!!
After a direct vent radiant heating system is installed in a new house, the
customer complains that "the walls and windows are wet". From the following list,
choose the best corrective action:
a.Advise the customer that the problem will disappear when the building dries
out
b.Recommend the installation of a mechanical ventilation system
c.After confirming that the heat exchanger is not cracked, advise the customer to
call another contractor
d.Recommend that a window be left open a bit - ANSWER-b.Recommend the
installation of a mechanical ventilation system
The instrument used to perform a passive depressurization test is a
a. Mercury gauge
b. Magnahelic gauge
c. Draft gauge
d. Air gauge - ANSWER-b. Magnahelic gauge
The best way to remove odors from a house is to
a. Install mechanical attic ventilation
b. Ventilate the house
c. Filter the air in the house
1|Page
, G2 EXAM PREPARATION VERSION 2
d. Humidify the air in the house - ANSWER-b. Ventilate the house
A poorly insulated building could result in
a. Decreased fuel costs
b. Increased fuel consumption
c. Insufficient building air supply
d. Excessive moisture in the building - ANSWER-b. Increased fuel consumption
Dilution air is defined as
a. The air mixed with the fuel before combustion takes place
b. The air mixed with the fuel after combustion takes place
c. The extra air added to ensure complete combustion
d. The air introduced at the draft hood to assist in the venting action - ANSWER-d.
The air introduced at the draft hood to assist in the venting action
The two readings required for obtaining the humidity in the air are
a. Dry bulb & static pressure
b. Dry bulb & velocity pressure
c. Dry bulb & air temperature
d. Dry bulb & wet bulb temperatures - ANSWER-d. Dry bulb & wet bulb
temperatures
If condensation starts forming on windows in the home, what action should be
taken?
2|Page
, G2 EXAM PREPARATION VERSION 2
a. Raise the humidity level at the humidistat
b. Lower the humidity level at the humidistat
c. Turn off the humidifier
d. Turn the humidistat to the 100% setting - ANSWER-b. Lower the humidity level
at the humidistat
Since 1996,the most common type of home construction is called
a. "platform" style
b. "envelope" style
c. "solid brick" style
d. "balloon" style - ANSWER-a. "platform" style
A commercial forced air furnace transfers heat in what medium?
a. Conductive
b. Thermal
c. Convective
d. Radiant - ANSWER-c. Convective
Relative humidity is defined as
a. The amount of moisture contained in a given quantity of air
b. The percentage of moisture that a quantity of air is holding in relation to how
much it can hold
c. The percentage of moisture contained in any quantity or temperature of air
3|Page
G2 EXAM PREPARATION VERSION 2 NEWEST 2025/2026
COMPLETE 300 QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND NEW VERSION!!
After a direct vent radiant heating system is installed in a new house, the
customer complains that "the walls and windows are wet". From the following list,
choose the best corrective action:
a.Advise the customer that the problem will disappear when the building dries
out
b.Recommend the installation of a mechanical ventilation system
c.After confirming that the heat exchanger is not cracked, advise the customer to
call another contractor
d.Recommend that a window be left open a bit - ANSWER-b.Recommend the
installation of a mechanical ventilation system
The instrument used to perform a passive depressurization test is a
a. Mercury gauge
b. Magnahelic gauge
c. Draft gauge
d. Air gauge - ANSWER-b. Magnahelic gauge
The best way to remove odors from a house is to
a. Install mechanical attic ventilation
b. Ventilate the house
c. Filter the air in the house
1|Page
, G2 EXAM PREPARATION VERSION 2
d. Humidify the air in the house - ANSWER-b. Ventilate the house
A poorly insulated building could result in
a. Decreased fuel costs
b. Increased fuel consumption
c. Insufficient building air supply
d. Excessive moisture in the building - ANSWER-b. Increased fuel consumption
Dilution air is defined as
a. The air mixed with the fuel before combustion takes place
b. The air mixed with the fuel after combustion takes place
c. The extra air added to ensure complete combustion
d. The air introduced at the draft hood to assist in the venting action - ANSWER-d.
The air introduced at the draft hood to assist in the venting action
The two readings required for obtaining the humidity in the air are
a. Dry bulb & static pressure
b. Dry bulb & velocity pressure
c. Dry bulb & air temperature
d. Dry bulb & wet bulb temperatures - ANSWER-d. Dry bulb & wet bulb
temperatures
If condensation starts forming on windows in the home, what action should be
taken?
2|Page
, G2 EXAM PREPARATION VERSION 2
a. Raise the humidity level at the humidistat
b. Lower the humidity level at the humidistat
c. Turn off the humidifier
d. Turn the humidistat to the 100% setting - ANSWER-b. Lower the humidity level
at the humidistat
Since 1996,the most common type of home construction is called
a. "platform" style
b. "envelope" style
c. "solid brick" style
d. "balloon" style - ANSWER-a. "platform" style
A commercial forced air furnace transfers heat in what medium?
a. Conductive
b. Thermal
c. Convective
d. Radiant - ANSWER-c. Convective
Relative humidity is defined as
a. The amount of moisture contained in a given quantity of air
b. The percentage of moisture that a quantity of air is holding in relation to how
much it can hold
c. The percentage of moisture contained in any quantity or temperature of air
3|Page
