G2 Gas Fitter Exam Prep
Questions and Answers (Graded
A)
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
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
,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
how often should a fire extinguisher be inspected? - ANSWER-Once a year
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
Which organization is responsible for administering fuel regulations for the
installation of gas and oil appliances - ANSWER-Technical Standards and
Safety Authority
Questions and Answers (Graded
A)
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
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
,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
how often should a fire extinguisher be inspected? - ANSWER-Once a year
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
Which organization is responsible for administering fuel regulations for the
installation of gas and oil appliances - ANSWER-Technical Standards and
Safety Authority
