Gas Technician G2 Exam Prep
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What will happen if the limit switch on a Category I atmospheric
equipment is open?
a.
Burner starts to fire
b.
The primary circuit of the transformer is interrupted
c.
The gas valve valve seat opens
d.
The blower is activated - The primary circuit of the transformer is
interrupted
What is an operating aquastat?
a.
A normally open switch that controls the temperature of water in a
boiler
b.
A normally open energy cut-off on a storage water heater
c.
A normally closed switch that controls the temperature of water in a
boiler
,d.
A normally closed pressure switch on a steam boiler - A normally
closed switch that controls the temperature of water in a boiler
When high temperatures like 3000 Deg. F is reached in pilot safety
control the:
a.
Bulb must be filled with nitrogen
b.
Bulb must be filled with magnesium
c.
Bulb must be filled with mercury
d.
Bulb must be filled with argon - Bulb must be filled with mercury
In an industrial building there a four gas fired appliances, two
atmospheric appliances 500,000 BTUH and 250,000 BTUH. Also in
the same mechanical room there is are two power burners 1,000,000
btuh and a 1,500,000 btuh. What is the combustion air requirements?
a.
190.47 Sq"
b.
246.43 Sq"
c.
375 Sq"
,d.
303.57 Sq" - 303.57 Sq"
Air entering through walls from the outside to inside is called?
a.
Ex-filtration
b.
Excess air
c.
Fresh air
d.
Infiltration - Infiltration
An outdoor air supply for a single hot water heater of 50,000 btuh
installed in a house built in 1997 is?
a.
Not required
b.
4 Sq"
c.
To be sized in accordance with table 8.1
d.
7 Sq" - Not required
As the air temperature is heated the relative humidity in the air?
a.
, Increases
b.
Decreases
c.
Need to be replaced
d.
Remains the same - Decreases
House built before 1993 has a natural drafted furnace 150,000 btuh,
and a power vented water heater of 75,000 btuh. The appliances are
located in the basement and is open to the entire structure. The entire
structure has a volume of 9000 ft3. What is the combustion air size?
a.
An opening of 225 Sq" at the lower level
b.
32 Sq"
c.
An opening of 225 Sq" at the lower level and an additional opening of
225 Sq" as high as practicable
d.
0 Sq" - 0 Sq"
In the winter heat flowing from inside a house to outside of the house
is called?
a.
Wind effect
2026 UPDATE Verified Questions
And Answers | With 100% Correct
Answers graded A+ Guaranteed
Success!!
What will happen if the limit switch on a Category I atmospheric
equipment is open?
a.
Burner starts to fire
b.
The primary circuit of the transformer is interrupted
c.
The gas valve valve seat opens
d.
The blower is activated - The primary circuit of the transformer is
interrupted
What is an operating aquastat?
a.
A normally open switch that controls the temperature of water in a
boiler
b.
A normally open energy cut-off on a storage water heater
c.
A normally closed switch that controls the temperature of water in a
boiler
,d.
A normally closed pressure switch on a steam boiler - A normally
closed switch that controls the temperature of water in a boiler
When high temperatures like 3000 Deg. F is reached in pilot safety
control the:
a.
Bulb must be filled with nitrogen
b.
Bulb must be filled with magnesium
c.
Bulb must be filled with mercury
d.
Bulb must be filled with argon - Bulb must be filled with mercury
In an industrial building there a four gas fired appliances, two
atmospheric appliances 500,000 BTUH and 250,000 BTUH. Also in
the same mechanical room there is are two power burners 1,000,000
btuh and a 1,500,000 btuh. What is the combustion air requirements?
a.
190.47 Sq"
b.
246.43 Sq"
c.
375 Sq"
,d.
303.57 Sq" - 303.57 Sq"
Air entering through walls from the outside to inside is called?
a.
Ex-filtration
b.
Excess air
c.
Fresh air
d.
Infiltration - Infiltration
An outdoor air supply for a single hot water heater of 50,000 btuh
installed in a house built in 1997 is?
a.
Not required
b.
4 Sq"
c.
To be sized in accordance with table 8.1
d.
7 Sq" - Not required
As the air temperature is heated the relative humidity in the air?
a.
, Increases
b.
Decreases
c.
Need to be replaced
d.
Remains the same - Decreases
House built before 1993 has a natural drafted furnace 150,000 btuh,
and a power vented water heater of 75,000 btuh. The appliances are
located in the basement and is open to the entire structure. The entire
structure has a volume of 9000 ft3. What is the combustion air size?
a.
An opening of 225 Sq" at the lower level
b.
32 Sq"
c.
An opening of 225 Sq" at the lower level and an additional opening of
225 Sq" as high as practicable
d.
0 Sq" - 0 Sq"
In the winter heat flowing from inside a house to outside of the house
is called?
a.
Wind effect
