G2 GAS FITTER EXAM PREP
CORRECT QUESTIONS & ANSWERS
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
the holder of a G1 certificate is permitted to work: - ANSWER on appliances with any
input in vapour phase
what action shall a person holding a gas technician certificate take, if an installation
does not ocnformt o the requirements of the Gaseous Fuels regulation but doesnt
present an immediate danger - ANSWER the person shall notify the distributor and the
owner in writing of the condition
a g3 technician is allowed to - ANSWER reactivate existing installations of appliances
up to 400k btu
What is a category 1 appliance - ANSWER an appliance that operates with a non-
positive vent static pressure and a flue loss of not less than 17%
What is a category 3 appliance - ANSWER an appliance that operates with a positive
vent static pressure and a flue loss of not less than 17%
what is a category 4 appliance - ANSWER an appliance that operates with a positive
vent static pressure and a flue loss of less than 17%
what is a category 2 appliance - ANSWER an appliance that operates with a non-
positive vent static pressure and flue loss less than 17%
which term is used to describe a stationary device used to diver the flow of flue gases -
ANSWER a baffle
what is the name of the part of a piping or tubing system which conveys gas from the
main supply piping, tubing, or header to an appliance or appliances: - ANSWER branch
line
which code expression is used to describe a structure used in connection with direct
trade or service to the building - ANSWER commercial building
Which code expression describes a building used in connection with production or
process work, or with storage or warehousing: - ANSWER industrial building
CORRECT QUESTIONS & ANSWERS
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
the holder of a G1 certificate is permitted to work: - ANSWER on appliances with any
input in vapour phase
what action shall a person holding a gas technician certificate take, if an installation
does not ocnformt o the requirements of the Gaseous Fuels regulation but doesnt
present an immediate danger - ANSWER the person shall notify the distributor and the
owner in writing of the condition
a g3 technician is allowed to - ANSWER reactivate existing installations of appliances
up to 400k btu
What is a category 1 appliance - ANSWER an appliance that operates with a non-
positive vent static pressure and a flue loss of not less than 17%
What is a category 3 appliance - ANSWER an appliance that operates with a positive
vent static pressure and a flue loss of not less than 17%
what is a category 4 appliance - ANSWER an appliance that operates with a positive
vent static pressure and a flue loss of less than 17%
what is a category 2 appliance - ANSWER an appliance that operates with a non-
positive vent static pressure and flue loss less than 17%
which term is used to describe a stationary device used to diver the flow of flue gases -
ANSWER a baffle
what is the name of the part of a piping or tubing system which conveys gas from the
main supply piping, tubing, or header to an appliance or appliances: - ANSWER branch
line
which code expression is used to describe a structure used in connection with direct
trade or service to the building - ANSWER commercial building
Which code expression describes a building used in connection with production or
process work, or with storage or warehousing: - ANSWER industrial building
