TSSA G3 Exam Question Set - High-Score Study Material

TSSA G3 Exam Question Set - High-Score Study Material 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 Air that is mixed with fuel prior to ignition is called: - answer - primary air Air that is mixed with fuel at the point of combustion and around the flame is called: - answer - secondary air What is excess air? - answer - 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: - answer - not premixing air and fuel prior to combustion The flue gases from the complete combustion of natural gas in air are primarily: - answer - Carbon dioxide, water vapour, nitrogen, excess air, heat and light Name four properties or characteristics of carbon monoxide gas. - answer - Colourless, Odourless, Tasteless, and Combustible Name four symptoms of carbon monoxi