G2 Gas Technician Exam | Questions and Verified Answers| 100% Correct| A Grade (2024/ 2025 Update)
QUESTION
When venting spillage occurs and flue
... [Show More] gases passes back through combustion zones what change occurs?
Answer:
Flue CO2 gases changes to CO.
QUESTION
For a free standing propane range in a large kitchen the flexible connector may be how long?
Answer:
6'
QUESTION
What would be the input of a .60gph oil nozzle?
Answer:
84,000 BTU (140 000 x .60)
QUESTION
On a high efficiency furnace, what turns on the blower fan?
Answer:
Relay timer
QUESTION
A leak limit orifice is only allowed to approximately discharge how much gas in 24 hours period?
Answer:
24 cubic feet
QUESTION
A bellow gas meter is also known as a ...?
Answer:
Positive displacement meter.
QUESTION
What is the ultimate reading of CO2 for natural gas?
Answer:
11.9%
QUESTION
And what would be the approximate O2 reading?
Answer:
3.0%
QUESTION
What does a barometric damper control?
Answer:
Flue gas dilution air.
QUESTION
One coil type boiler over 400,000 btu would need?
Answer:
Flow sensor and hi limit.
QUESTION
A portable infrared heater that can not be interlocked shall be connected to?
Answer:
CO2 monitor alarm.
QUESTION
With the installation of a 75,000 btu atmospheric hot water tank in a tight house, how much free air is required when using a round duct?
Answer:
4"
QUESTION
Installation of one 400,000 btu natural draft boiler in a tight enclosure would require an air supply opening of?
Answer:
58 sq in
QUESTION
On a decorative appliance with an H shape burner the carry over ports ensure what?
Answer:
Ignition of burner.
QUESTION
The temperature high intensity infrared heater could reach up to?
Answer:
1800F
QUESTION
Stack effect means?
Answer:
Warm air will rise.
QUESTION
If we had two 500,000 btu atmospheric boilers and one 2,000,000 btu boiler with a power burner what would be the required air supply opening?
Answer:
209 sq in
QUESTION
And what would be the ventilation air size?
Answer:
21 sq in
QUESTION
And if the air supply had fix louvers reducing our air supply opening by 20% how many square inches more would be needed for the air supply opening?
Answer:
41.8 sq in
QUESTION
When installing air supply duct, how far above the burner should it be?
Answer:
within 12"
QUESTION
What would be the temperature setting for a T and P relief valve on a domestic hot water tank?
Answer:
210F
QUESTION
If a domestic hot water tank droped in temperature after five minutes of use what could be the problem?
Answer:
Broken dip tube
QUESTION
What is the minimum location from a property line that a pool heater can be installed? [Show Less]