Questions and CORRECT Answers
What is combustion air? - CORRECT ANSWER - The air required for satifactory
combistion of a gas with wxcess air.
How far should be the base of a ladder if the ladder is 36' tall - CORRECT ANSWER - 12'
What does MSDS stand for? - CORRECT ANSWER - Material Safety Data Sheet
For self protection you would need? - CORRECT ANSWER - Hard hat, gloves, safety
glasses, boots
A ladder must extend above a roof? - CORRECT ANSWER - 36" or 3 ft
What is the explosion limit of natural gas? - CORRECT ANSWER - 4% to 14%
What is the ignition temperature of natural gas? - CORRECT ANSWER - 1200F
What is the flame temperature of natural gas? - CORRECT ANSWER - 3550F
What is the flame temperature of propane - CORRECT ANSWER - 3600
What is the air to gas ratio for propane? - CORRECT ANSWER - 23 to 1
What is the expansion rate of propane? - CORRECT ANSWER - 23 to 1
What is the heating value of natural gas? - CORRECT ANSWER - 1000 BTU
, Who is the testing agency that certified piping? - CORRECT ANSWER - ULC
What is the relief pressure for a propane tank? - CORRECT ANSWER - 375 PSIG
Who issues gas tickets in Ontario - CORRECT ANSWER - TSSA
What is the flammability range of CO - CORRECT ANSWER - 12% to 74%
What are the products of complete combustion? - CORRECT ANSWER - Carbon dioxide,
water and heat.
What is needed to start combustion? - CORRECT ANSWER - Ignition, air and fuel
What is the air needed to operate a gas appliance safely? - CORRECT ANSWER -
Combustion air, excess air and dilution air.
What is the boiling point of natural gas? - CORRECT ANSWER - -258°F
What is the relative density of propane? - CORRECT ANSWER - 1.52
What is air comprised of? - CORRECT ANSWER - 80% nitrogen 20% oxygen
What are the products of incomplete combustion? - CORRECT ANSWER - Aldehydes,
carbon monoxide and soot.
What type of air is mixed with gas prior to combustion - CORRECT ANSWER - Primary
air