TSSA G3 EXAM QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS ALREADY PASSED!!!
Natural gas and propane are:
Answer: Members of the hydrocarbon family
Natural gas and propane are composed mainly of:
Answer: Carbon and hydrogen
What is the odorant added to natural gas and propane?
Answer: Mercaptan
85% to 95% of natural gas is composed of:
Answer: Methane
Chemical formula for Methane:
Answer: CH₄
Chemical formula for Propane:
Answer: C₃H₈
Chemical formula for Oxygen:
Answer: O₂
Chemical formula for Nitrogen:
Answer: N₂
,Chemical formula for Water:
Answer: H₂O
Chemical formula for Carbon Dioxide:
Answer: CO₂
Chemical formula for Carbon Monoxide: -ANSWER✔✔CO
The approximately percentage of oxygen and nitrogen in air is: -
ANSWER✔✔21% Oxygen and 79% Nitrogen
The properties concerning natural gas and propane is on what page of the
codebook? -ANSWER✔✔351
(T/F) Propane liquid escaping from a container rapidly drops in temperature -
ANSWER✔✔True
What is L.E.L.? -ANSWER✔✔The lowest percent of gas in the air-gas mixture
that will support combustion
Odorant is added to natural gas at the: -ANSWER✔✔City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
ANSWER✔✔3500 F
The two main hydrocarbons which form natural gas are: -ANSWER✔✔methane
and ethane
,The boiling point of propane is: -ANSWER✔✔-44 F
The boiling point of natural gas is: -ANSWER✔✔-260 F
What is the ignition temperature of propane gas compared to natural gas? -
ANSWER✔✔Lower for propane
What is the ignition temperature of propane gas? -ANSWER✔✔920 to 1020 F
Is natural gas heavier or lighter than air? -ANSWER✔✔lighter
Is propane heavier or lighter than air? -ANSWER✔✔heavier
One imperial gallon of propane weighs: -ANSWER✔✔5.1 pounds (2.3 kilograms)
At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? -
ANSWER✔✔8.50
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.
When one pound of propane burns, it releases approximately: -
ANSWER✔✔21,600 Btu
, The relative density of liquid propane as compared to water is approximately: -
ANSWER✔✔0.5
Propane is a: -ANSWER✔✔hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the
propane: -ANSWER✔✔increases
One boiler horsepower is approximately: -ANSWER✔✔34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: -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? -
ANSWER✔✔Oxygen, Heat, and Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) -ANSWER✔✔Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: -
ANSWER✔✔water vapour, carbon dioxide, heat, and light
What air to gas ratio is required for the complete combustion of natural gas? -
ANSWER✔✔10 parts of air to 1 part of gas
What air to gas ratio is required for the complete combustion of propane? -
ANSWER✔✔24 parts of air to 1 part of gas
ANSWERS WITH COMPLETE
SOLUTIONS ALREADY PASSED!!!
Natural gas and propane are:
Answer: Members of the hydrocarbon family
Natural gas and propane are composed mainly of:
Answer: Carbon and hydrogen
What is the odorant added to natural gas and propane?
Answer: Mercaptan
85% to 95% of natural gas is composed of:
Answer: Methane
Chemical formula for Methane:
Answer: CH₄
Chemical formula for Propane:
Answer: C₃H₈
Chemical formula for Oxygen:
Answer: O₂
Chemical formula for Nitrogen:
Answer: N₂
,Chemical formula for Water:
Answer: H₂O
Chemical formula for Carbon Dioxide:
Answer: CO₂
Chemical formula for Carbon Monoxide: -ANSWER✔✔CO
The approximately percentage of oxygen and nitrogen in air is: -
ANSWER✔✔21% Oxygen and 79% Nitrogen
The properties concerning natural gas and propane is on what page of the
codebook? -ANSWER✔✔351
(T/F) Propane liquid escaping from a container rapidly drops in temperature -
ANSWER✔✔True
What is L.E.L.? -ANSWER✔✔The lowest percent of gas in the air-gas mixture
that will support combustion
Odorant is added to natural gas at the: -ANSWER✔✔City gate station
The maximum flame temperature from the combustion of natural gas with air is: -
ANSWER✔✔3500 F
The two main hydrocarbons which form natural gas are: -ANSWER✔✔methane
and ethane
,The boiling point of propane is: -ANSWER✔✔-44 F
The boiling point of natural gas is: -ANSWER✔✔-260 F
What is the ignition temperature of propane gas compared to natural gas? -
ANSWER✔✔Lower for propane
What is the ignition temperature of propane gas? -ANSWER✔✔920 to 1020 F
Is natural gas heavier or lighter than air? -ANSWER✔✔lighter
Is propane heavier or lighter than air? -ANSWER✔✔heavier
One imperial gallon of propane weighs: -ANSWER✔✔5.1 pounds (2.3 kilograms)
At 60°F (15,5° C) a pound of propane produces how many cubic feet of gas? -
ANSWER✔✔8.50
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.
When one pound of propane burns, it releases approximately: -
ANSWER✔✔21,600 Btu
, The relative density of liquid propane as compared to water is approximately: -
ANSWER✔✔0.5
Propane is a: -ANSWER✔✔hydrocarbon
As the temperature of liquid propane in a tank increases, the vapour pressure of the
propane: -ANSWER✔✔increases
One boiler horsepower is approximately: -ANSWER✔✔34.000 Btuh (10 kW)
The "specific gravity of a gas (vapour)" is: -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? -
ANSWER✔✔Oxygen, Heat, and Fuel.
What would be the easiest to control or eliminate in a
leak situation (before a fire occurs) -ANSWER✔✔Shutting off the fuel
The products of perfect combustion of natural gas or propane with oxygen are: -
ANSWER✔✔water vapour, carbon dioxide, heat, and light
What air to gas ratio is required for the complete combustion of natural gas? -
ANSWER✔✔10 parts of air to 1 part of gas
What air to gas ratio is required for the complete combustion of propane? -
ANSWER✔✔24 parts of air to 1 part of gas
