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TSSA G3 Exam Questions and answers | Latest 2024/25 RATED A+ NEWEST Gas Technician 3 Study Guide
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TSSA G3 Exam Questions and answers | Latest 2024/25 RATED A+ NEWEST Gas Technician 3 Study Guide
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TSSA G3 Exam Questions and answers |Latest 2024/25 RATED A+ NEWEST Gas
Technician 3 Study Guide
Natural gas and propane are: - members of the hydrocarbon family
Natural gas and propane are composed mainly of: - carbon and hydrogen
What is the odorant added to natural gas and propane? - mercaptan
85% to 95% of natural gas is composed of: - methane
Chemical formula for Methane: - CH4
Chemical formula for Propane: - C3H8
Chemical formula for Oxygen: - O2
Chemical formula for Nitrogen: - N2
Chemical formula for Water: - H2O
Chemical formula for Carbon Dioxide: - CO2
Chemical formula for Carbon Monoxide: - CO
The approximately percentage of oxygen and nitrogen in air is: - 21% Oxygen and
79% Nitrogen
The properties concerning natural gas and propane is on what page of the codebook? -
351
(T/F) Propane liquid escaping from a container rapidly drops in temperature - True
What is L.E.L.? - The lowest percent of gas in the air-gas mixture that will support
combustion
Odorant is added to natural gas at the: - City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
3500 F
The two main hydrocarbons which form natural gas are: - methane and ethane
The boiling point of propane is: - -44 F
,The boiling point of natural gas is: - -260 F
What is the ignition temperature of propane gas compared to natural gas? - Lower for
propane
What is the ignition temperature of propane gas? - 920 to 1020 F
Is natural gas heavier or lighter than air? - lighter
Is propane heavier or lighter than air? - heavier
One imperial gallon of propane weighs: - 5.1 pounds (2.3 kilograms)
At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? - 8.50
Propane shall have a distinctive odour content to ensure it is readily detectable in the
atmosphere down to concentrations of: - 20% of the lower explosive limit.
When one pound of propane burns, it releases approximately: - 21,600 Btu
The relative density of liquid propane as compared to water is approximately: - 0.5
Propane is a: - hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the
propane: - increases
One boiler horsepower is approximately: - 34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: - the weight of the gas as compared to the
weight of an equal volume of air
Name the three elements required for combustion of any fuel? - Oxygen, Heat, and
Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) - Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: - water
vapour, carbon dioxide, heat, and light
What air to gas ratio is required for the complete combustion of natural gas? - 10 parts
of air to 1 part of gas
, What air to gas ratio is required for the complete combustion of propane? - 24 parts of
air to 1 part of gas
Air that is mixed with fuel prior to ignition is called: - primary air
Air that is mixed with fuel at the point of combustion and around the flame is called: -
secondary air
What is excess air? - Air in the combustion zone in addition to that which is required
for combustion.
A long, yellow flame (or luminous/ carbonizing flame) on an atmospheric burner is
caused by: - not premixing air and fuel prior to combustion
The flue gases from the complete combustion of natural gas in air are primarily: -
Carbon dioxide, water vapour, nitrogen, excess air, heat and light
Name four properties or characteristics of carbon monoxide gas. - Colourless,
Odourless, Tasteless, and Combustible
Name four symptoms of carbon monoxide poisoning. - Dizziness, Headaches,
Shortness of breath, and Nausea/ Vomiting
(T/F) Carbon Monoxide is toxic - True
Two undesirable products of incomplete combustion are: - Carbon monoxide and
aldehydes
What refers to the air found in the products of combustion
after the complete combustion of natural gas or propane? - excess air
Carbon dioxide and nitrogen are: - inert gases
Which one of the following substances is inert and passes through the combustion
zone absorbing heat during the combustion process? - nitrogen
What is the approximate dew point of the water vapour in combustion gases produced
by a property setup appliance? - 130 F (54 C)
Carbon monoxide is: - a toxic gas which is combustible
Carbon monoxide is produced during the incomplete combustion of: - hydrocarbon
fuels
Air supply to a gas-fired appliance includes: - Air required for satisfactory combustion
of gas
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