G2 GAS FITTER EXAM PREP 290 QUESTIONS &
CORRECT ANSWERS LATEST 2025
the odorant added to natural gas for detection purposes is - ANSWER-mercaptan
what is the approximate ignition temperature of natural gas - ANSWER-
1200*F(649*C)
the specific gravity of natural gas is - ANSWER-0.6
major constituents of flue gases after the proper combustion of natural gas in air
are: - ANSWER-CO2, H2O, N2, O2, and heat
a bunsen flame is characterized by its - ANSWER-blue appearance
the two main hyrdocarbons which form natural gas are: - ANSWER-methan and
ethane
what theoretical gas to air ratio is necesary to achieve perfect combustion with an
atmospheric natural gas burner - ANSWER-1 part of natural gas to 10 parts of air
carbon monoxide is produced through - ANSWER-incomplete combustion
,the products of complete combustion of natural gas in the air are: - ANSWER-
carbon dioxide, water vapour, and heat
if a natural gas flame is adjusted to produce more than 10% carbon dioxide: -
ANSWER-carbon monoxide may be produced
what could result if a flame is adjusted with too much primary air - ANSWER-
flame lift
carbon dioxide and nitrogen are - ANSWER-inert gases
natural gas is 85-90%: - ANSWER-methane
how much air is require to bum 1000 cubic feet of natural gas per hour - ANSWER-
10,000 cu ft
one boiler horsepower is approximately - ANSWER-34k btu(10kw)
two undersirable products of incomplete combustion are - ANSWER-CO2 and
aldehydes
which substance is inert and passes through the combustion zone absorbing heat
during the combustion process - ANSWER-nitrogen
the relative density of liquid propane is approximately - ANSWER-0.5
,propane is a - ANSWER-hydrocarbon
at 60f (15.5*C) a pound of propane produces how many cubic feet of gas? -
ANSWER-8.50
propane shall have a distinctive odour content to ensure it is readily detectable in
the atmosphere down to concentrations of - ANSWER-20% of the lower explosive
limit
in a natural gas and air mixture, what are the approximate lower and upper limits
of flamability - ANSWER-4-14%
carbon monoxide is - ANSWER-a toxic gas which is combustible
the heat content of 1 cubic foot of natural gas is approximatelyT - ANSWER-1k
BTU
how often should a fire extinguisher be inspected? - ANSWER-Once a year
Which organization is responsible for administering fuel regulations for the
installation of gas and oil appliances - ANSWER-Technical Standards and Safety
Authority
Which of the following are accredited to certify gas appliances, equipment, and
accessories: - ANSWER-Canadian Gas Association, Underwriters' Laboratories of
Canada, the Canadian Standards Association, and the TSSA
, which of the following is the ultimate authority under the the technical standards
and safety act as it applies to the installation of natural gas and propane
appliances equipment: - ANSWER-Ontario Government
propane cylinders used in Ontario must be manufactured and approved to the
requirements established by - ANSWER-Transport Canada
the requalificaiton of refillable propane cylinders used in Ontario must be done in
accordance with the procedures for cylinders as established by the : - ANSWER-
Compressed Gas Association
which organization registers certified gas and oil technicians in Ontario - ANSWER-
The ministry of energy
a steam boiler shall conform to the requirements of which of the following
agencies or organizations - ANSWER-TSSA
the section of the Ontario gas utilization code allowing 1psi drop in a tubing
system operating at 2psig(13.79kPa) is: - ANSWER-6
Propane cylinders manufactured in Canada after January 1, 1993 are to be built
and marked to the specification of - ANSWER-Transport Canada
which of the following is covered in the B149.1 Installation code - ANSWER-
installation of appliances
Which of the following is covered in the B149.1 installation code: - ANSWER-
installation of venting systems
CORRECT ANSWERS LATEST 2025
the odorant added to natural gas for detection purposes is - ANSWER-mercaptan
what is the approximate ignition temperature of natural gas - ANSWER-
1200*F(649*C)
the specific gravity of natural gas is - ANSWER-0.6
major constituents of flue gases after the proper combustion of natural gas in air
are: - ANSWER-CO2, H2O, N2, O2, and heat
a bunsen flame is characterized by its - ANSWER-blue appearance
the two main hyrdocarbons which form natural gas are: - ANSWER-methan and
ethane
what theoretical gas to air ratio is necesary to achieve perfect combustion with an
atmospheric natural gas burner - ANSWER-1 part of natural gas to 10 parts of air
carbon monoxide is produced through - ANSWER-incomplete combustion
,the products of complete combustion of natural gas in the air are: - ANSWER-
carbon dioxide, water vapour, and heat
if a natural gas flame is adjusted to produce more than 10% carbon dioxide: -
ANSWER-carbon monoxide may be produced
what could result if a flame is adjusted with too much primary air - ANSWER-
flame lift
carbon dioxide and nitrogen are - ANSWER-inert gases
natural gas is 85-90%: - ANSWER-methane
how much air is require to bum 1000 cubic feet of natural gas per hour - ANSWER-
10,000 cu ft
one boiler horsepower is approximately - ANSWER-34k btu(10kw)
two undersirable products of incomplete combustion are - ANSWER-CO2 and
aldehydes
which substance is inert and passes through the combustion zone absorbing heat
during the combustion process - ANSWER-nitrogen
the relative density of liquid propane is approximately - ANSWER-0.5
,propane is a - ANSWER-hydrocarbon
at 60f (15.5*C) a pound of propane produces how many cubic feet of gas? -
ANSWER-8.50
propane shall have a distinctive odour content to ensure it is readily detectable in
the atmosphere down to concentrations of - ANSWER-20% of the lower explosive
limit
in a natural gas and air mixture, what are the approximate lower and upper limits
of flamability - ANSWER-4-14%
carbon monoxide is - ANSWER-a toxic gas which is combustible
the heat content of 1 cubic foot of natural gas is approximatelyT - ANSWER-1k
BTU
how often should a fire extinguisher be inspected? - ANSWER-Once a year
Which organization is responsible for administering fuel regulations for the
installation of gas and oil appliances - ANSWER-Technical Standards and Safety
Authority
Which of the following are accredited to certify gas appliances, equipment, and
accessories: - ANSWER-Canadian Gas Association, Underwriters' Laboratories of
Canada, the Canadian Standards Association, and the TSSA
, which of the following is the ultimate authority under the the technical standards
and safety act as it applies to the installation of natural gas and propane
appliances equipment: - ANSWER-Ontario Government
propane cylinders used in Ontario must be manufactured and approved to the
requirements established by - ANSWER-Transport Canada
the requalificaiton of refillable propane cylinders used in Ontario must be done in
accordance with the procedures for cylinders as established by the : - ANSWER-
Compressed Gas Association
which organization registers certified gas and oil technicians in Ontario - ANSWER-
The ministry of energy
a steam boiler shall conform to the requirements of which of the following
agencies or organizations - ANSWER-TSSA
the section of the Ontario gas utilization code allowing 1psi drop in a tubing
system operating at 2psig(13.79kPa) is: - ANSWER-6
Propane cylinders manufactured in Canada after January 1, 1993 are to be built
and marked to the specification of - ANSWER-Transport Canada
which of the following is covered in the B149.1 Installation code - ANSWER-
installation of appliances
Which of the following is covered in the B149.1 installation code: - ANSWER-
installation of venting systems
