TSSA G3 Exam UPDATED Actual Exam
Questions and CORRECT Answers
Natural gas and propane are: - CORRECT ANSWER✔✔- members of the hydrocarbon
family
Natural gas and propane are composed mainly of: - CORRECT ANSWER✔✔- carbon and
hydrogen
What is the odorant added to natural gas and propane? - CORRECT ANSWER✔✔-
mercaptan
85% to 95% of natural gas is composed of: - CORRECT ANSWER✔✔- methane
Chemical formula for Methane: - CORRECT ANSWER✔✔- CH4
Chemical formula for Propane: - CORRECT ANSWER✔✔- C3H8
Chemical formula for Oxygen: - CORRECT ANSWER✔✔- O2
Chemical formula for Nitrogen: - CORRECT ANSWER✔✔- N2
Chemical formula for Water: - CORRECT ANSWER✔✔- H2O
Chemical formula for Carbon Dioxide: - CORRECT ANSWER✔✔- CO2
Chemical formula for Carbon Monoxide: - CORRECT ANSWER✔✔- CO
The approximately percentage of oxygen and nitrogen in air is: - CORRECT ANSWER✔✔-
21% Oxygen and 79% Nitrogen
,The properties concerning natural gas and propane is on what page of the codebook? -
CORRECT ANSWER✔✔- 351
(T/F) Propane liquid escaping from a container rapidly drops in temperature - CORRECT
ANSWER✔✔- True
What is L.E.L.? - CORRECT ANSWER✔✔- The lowest percent of gas in the air-gas mixture
that will support combustion
Odorant is added to natural gas at the: - CORRECT ANSWER✔✔- City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
CORRECT ANSWER✔✔- 3500 F
The two main hydrocarbons which form natural gas are: - CORRECT ANSWER✔✔-
methane and ethane
The boiling point of propane is: - CORRECT ANSWER✔✔- -44 F
The boiling point of natural gas is: - CORRECT ANSWER✔✔- -260 F
What is the ignition temperature of propane gas compared to natural gas? - CORRECT
ANSWER✔✔- Lower for propane
What is the ignition temperature of propane gas? - CORRECT ANSWER✔✔- 920 to 1020 F
Is natural gas heavier or lighter than air? - CORRECT ANSWER✔✔- lighter
Is propane heavier or lighter than air? - CORRECT ANSWER✔✔- heavier
One imperial gallon of propane weighs: - CORRECT ANSWER✔✔- 5.1 pounds (2.3
kilograms)
, At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? - CORRECT
ANSWER✔✔- 8.50
Propane shall have a distinctive odour content to ensure it is readily detectable in the
atmosphere down to concentrations of: - CORRECT ANSWER✔✔- 20% of the lower
explosive limit.
When one pound of propane burns, it releases approximately: - CORRECT ANSWER✔✔-
21,600 Btu
The relative density of liquid propane as compared to water is approximately: - CORRECT
ANSWER✔✔- 0.5
Propane is a: - CORRECT ANSWER✔✔- hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the propane: -
CORRECT ANSWER✔✔- increases
One boiler horsepower is approximately: - CORRECT ANSWER✔✔- 34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: - CORRECT ANSWER✔✔- 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? - CORRECT ANSWER✔✔-
Oxygen, Heat, and Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) - CORRECT ANSWER✔✔- Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: - CORRECT
ANSWER✔✔- water vapour, carbon dioxide, heat, and light
Questions and CORRECT Answers
Natural gas and propane are: - CORRECT ANSWER✔✔- members of the hydrocarbon
family
Natural gas and propane are composed mainly of: - CORRECT ANSWER✔✔- carbon and
hydrogen
What is the odorant added to natural gas and propane? - CORRECT ANSWER✔✔-
mercaptan
85% to 95% of natural gas is composed of: - CORRECT ANSWER✔✔- methane
Chemical formula for Methane: - CORRECT ANSWER✔✔- CH4
Chemical formula for Propane: - CORRECT ANSWER✔✔- C3H8
Chemical formula for Oxygen: - CORRECT ANSWER✔✔- O2
Chemical formula for Nitrogen: - CORRECT ANSWER✔✔- N2
Chemical formula for Water: - CORRECT ANSWER✔✔- H2O
Chemical formula for Carbon Dioxide: - CORRECT ANSWER✔✔- CO2
Chemical formula for Carbon Monoxide: - CORRECT ANSWER✔✔- CO
The approximately percentage of oxygen and nitrogen in air is: - CORRECT ANSWER✔✔-
21% Oxygen and 79% Nitrogen
,The properties concerning natural gas and propane is on what page of the codebook? -
CORRECT ANSWER✔✔- 351
(T/F) Propane liquid escaping from a container rapidly drops in temperature - CORRECT
ANSWER✔✔- True
What is L.E.L.? - CORRECT ANSWER✔✔- The lowest percent of gas in the air-gas mixture
that will support combustion
Odorant is added to natural gas at the: - CORRECT ANSWER✔✔- City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
CORRECT ANSWER✔✔- 3500 F
The two main hydrocarbons which form natural gas are: - CORRECT ANSWER✔✔-
methane and ethane
The boiling point of propane is: - CORRECT ANSWER✔✔- -44 F
The boiling point of natural gas is: - CORRECT ANSWER✔✔- -260 F
What is the ignition temperature of propane gas compared to natural gas? - CORRECT
ANSWER✔✔- Lower for propane
What is the ignition temperature of propane gas? - CORRECT ANSWER✔✔- 920 to 1020 F
Is natural gas heavier or lighter than air? - CORRECT ANSWER✔✔- lighter
Is propane heavier or lighter than air? - CORRECT ANSWER✔✔- heavier
One imperial gallon of propane weighs: - CORRECT ANSWER✔✔- 5.1 pounds (2.3
kilograms)
, At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? - CORRECT
ANSWER✔✔- 8.50
Propane shall have a distinctive odour content to ensure it is readily detectable in the
atmosphere down to concentrations of: - CORRECT ANSWER✔✔- 20% of the lower
explosive limit.
When one pound of propane burns, it releases approximately: - CORRECT ANSWER✔✔-
21,600 Btu
The relative density of liquid propane as compared to water is approximately: - CORRECT
ANSWER✔✔- 0.5
Propane is a: - CORRECT ANSWER✔✔- hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the propane: -
CORRECT ANSWER✔✔- increases
One boiler horsepower is approximately: - CORRECT ANSWER✔✔- 34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: - CORRECT ANSWER✔✔- 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? - CORRECT ANSWER✔✔-
Oxygen, Heat, and Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) - CORRECT ANSWER✔✔- Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: - CORRECT
ANSWER✔✔- water vapour, carbon dioxide, heat, and light
