TSSA G3 Exam UPDATED 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
What air to gas ratio is required for the complete combustion of natural gas? - CORRECT
ANSWER- 10 parts of air to 1 part of gas
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
What air to gas ratio is required for the complete combustion of natural gas? - CORRECT
ANSWER- 10 parts of air to 1 part of gas
