TSSA G3 EXAM WITH COMPLETE
SOLUTIONS
Natural gas and propane are: - Answers -members of the hydrocarbon family
Natural gas and propane are composed mainly of: - Answers -carbon and hydrogen
What is the odorant added to natural gas and propane? - Answers -mercaptan
85% to 95% of natural gas is composed of: - Answers –methane
Ignition transformers are: - Answers -Step-up transformers
Transformers which produce a secondary voltage that is higher than the primary are
called: - Answers -Step up transformers
(T/F) Transformers which produce a secondary voltage which is lower than the primary
are called step down transformers - Answers -True
(T/F) The electrical code requires that only one bare conductor is connected to a screw
terminal - Answers -True
Electrical wires shall be supported: - Answers -Every 5 feet and within 1 foot of a
junction box or turn in direction
Chemical formula for Methane: - Answers -CH4
Chemical formula for Propane: - Answers -C3H8
Chemical formula for Oxygen: - Answers -O2
Chemical formula for Nitrogen: - Answers -N2
Chemical formula for Water: - Answers -H2O
Chemical formula for Carbon Dioxide: - Answers -CO2
Chemical formula for Carbon Monoxide: - Answers -CO
,The approximately percentage of oxygen and nitrogen in air is: - Answers -21% Oxygen
and 79% Nitrogen
The properties concerning natural gas and propane is on what page of the codebook? -
Answers -351
(T/F) Propane liquid escaping from a container rapidly drops in temperature - Answers -
True
What is L.E.L.? - Answers -The lowest percent of gas in the air-gas mixture that will
support combustion
Odorant is added to natural gas at the: - Answers -City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
Answers -3500 F
The two main hydrocarbons which form natural gas are: - Answers -methane and
ethane
The boiling point of propane is: - Answers --44 F
The boiling point of natural gas is: - Answers --260 F
What is the ignition temperature of propane gas compared to natural gas? - Answers -
Lower for propane
What is the ignition temperature of propane gas? - Answers -920 to 1020 F
Is natural gas heavier or lighter than air? - Answers -lighter
Is propane heavier or lighter than air? - Answers -heavier
One imperial gallon of propane weighs: - Answers -5.1 pounds (2.3 kilograms)
At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? - Answers
-8.50
Propane shall have a distinctive odour content to ensure it is readily detectable in the
atmosphere down to concentrations of: - Answers -20% of the lower explosive limit.
When one pound of propane burns, it releases approximately: - Answers -21,600 Btu
The relative density of liquid propane as compared to water is approximately: - Answers
-0.5
, Propane is a: - Answers -hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the
propane: - Answers -increases
One boiler horsepower is approximately: - Answers -34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: - Answers -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? - Answers -Oxygen,
Heat, and Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) - Answers -Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: -
Answers -water vapour, carbon dioxide, heat, and light
What air to gas ratio is required for the complete combustion of natural gas? - Answers -
10 parts of air to 1 part of gas
What air to gas ratio is required for the complete combustion of propane? - Answers -24
parts of air to 1 part of gas
Air that is mixed with fuel prior to ignition is called: - Answers -primary air
Air that is mixed with fuel at the point of combustion and around the flame is called: -
Answers -secondary air
What is excess air? - Answers -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: - Answers -not premixing air and fuel prior to combustion
The flue gases from the complete combustion of natural gas in air are primarily: -
Answers -Carbon dioxide, water vapour, nitrogen, excess air, heat and light
Name four properties or characteristics of carbon monoxide gas. - Answers -Colourless,
Odourless, Tasteless, and Combustible
Name four symptoms of carbon monoxide poisoning. - Answers -Dizziness, Headaches,
Shortness of breath, and Nausea/ Vomiting
(T/F) Carbon Monoxide is toxic - Answers -True
SOLUTIONS
Natural gas and propane are: - Answers -members of the hydrocarbon family
Natural gas and propane are composed mainly of: - Answers -carbon and hydrogen
What is the odorant added to natural gas and propane? - Answers -mercaptan
85% to 95% of natural gas is composed of: - Answers –methane
Ignition transformers are: - Answers -Step-up transformers
Transformers which produce a secondary voltage that is higher than the primary are
called: - Answers -Step up transformers
(T/F) Transformers which produce a secondary voltage which is lower than the primary
are called step down transformers - Answers -True
(T/F) The electrical code requires that only one bare conductor is connected to a screw
terminal - Answers -True
Electrical wires shall be supported: - Answers -Every 5 feet and within 1 foot of a
junction box or turn in direction
Chemical formula for Methane: - Answers -CH4
Chemical formula for Propane: - Answers -C3H8
Chemical formula for Oxygen: - Answers -O2
Chemical formula for Nitrogen: - Answers -N2
Chemical formula for Water: - Answers -H2O
Chemical formula for Carbon Dioxide: - Answers -CO2
Chemical formula for Carbon Monoxide: - Answers -CO
,The approximately percentage of oxygen and nitrogen in air is: - Answers -21% Oxygen
and 79% Nitrogen
The properties concerning natural gas and propane is on what page of the codebook? -
Answers -351
(T/F) Propane liquid escaping from a container rapidly drops in temperature - Answers -
True
What is L.E.L.? - Answers -The lowest percent of gas in the air-gas mixture that will
support combustion
Odorant is added to natural gas at the: - Answers -City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
Answers -3500 F
The two main hydrocarbons which form natural gas are: - Answers -methane and
ethane
The boiling point of propane is: - Answers --44 F
The boiling point of natural gas is: - Answers --260 F
What is the ignition temperature of propane gas compared to natural gas? - Answers -
Lower for propane
What is the ignition temperature of propane gas? - Answers -920 to 1020 F
Is natural gas heavier or lighter than air? - Answers -lighter
Is propane heavier or lighter than air? - Answers -heavier
One imperial gallon of propane weighs: - Answers -5.1 pounds (2.3 kilograms)
At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? - Answers
-8.50
Propane shall have a distinctive odour content to ensure it is readily detectable in the
atmosphere down to concentrations of: - Answers -20% of the lower explosive limit.
When one pound of propane burns, it releases approximately: - Answers -21,600 Btu
The relative density of liquid propane as compared to water is approximately: - Answers
-0.5
, Propane is a: - Answers -hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the
propane: - Answers -increases
One boiler horsepower is approximately: - Answers -34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: - Answers -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? - Answers -Oxygen,
Heat, and Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) - Answers -Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: -
Answers -water vapour, carbon dioxide, heat, and light
What air to gas ratio is required for the complete combustion of natural gas? - Answers -
10 parts of air to 1 part of gas
What air to gas ratio is required for the complete combustion of propane? - Answers -24
parts of air to 1 part of gas
Air that is mixed with fuel prior to ignition is called: - Answers -primary air
Air that is mixed with fuel at the point of combustion and around the flame is called: -
Answers -secondary air
What is excess air? - Answers -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: - Answers -not premixing air and fuel prior to combustion
The flue gases from the complete combustion of natural gas in air are primarily: -
Answers -Carbon dioxide, water vapour, nitrogen, excess air, heat and light
Name four properties or characteristics of carbon monoxide gas. - Answers -Colourless,
Odourless, Tasteless, and Combustible
Name four symptoms of carbon monoxide poisoning. - Answers -Dizziness, Headaches,
Shortness of breath, and Nausea/ Vomiting
(T/F) Carbon Monoxide is toxic - Answers -True
