Gas Theory Part A

Question 1

Q: Combustion Triangle consists of

Answer 1

A: Heat, Oxygen & Fuel

Question 2

Q: The three T’s For the Combustion Triangle

Answer 2

A: Time, Temp, & turbulence

Question 3

Q: Products of Complete Combustion

Answer 3

A: Water, Carbon Dioxide & Heat

Question 4

Q: Products of Incomplete Combustion

Answer 4

A: Water, Carbon Dioxide, Heat, Carbon Monoxide and Soot.

Question 5

Q: LEL stands for

Answer 5

A: Lower Explosion Limit.

Question 6

Q: UEL stands for

Answer 6

A: Upper Explosion Limit.

Question 7

Q: Downstream (After the appliance Regulator NG) what pressure should you see.

Answer 7

A: 3.5WC is common.

Question 8

Q: Downstream (After the appliance Regulator LP) what pressure should you see.

Answer 8

A: 10-11WC is common.

Question 9

Q: What does WC stand for.

Answer 9

A: Water Colum.

Question 10

Q: Natural Gas Inlet Meter Pressure

Answer 10

A: 7.5WC

Question 11

Q: Natural Gas Outlet Meter Pressure (House Line)

Answer 11

A: 7.0WC

Question 12

Q: BTU Stands For

Answer 12

A: British Thermal Units

Question 13

Q: What colour of thread tape is approved for NG

Answer 13

A: Yellow

Question 14

Q: Maximum temp a propane tank can be exposed to

Answer 14

A: 50C

Question 15

Q: What is a Manometer.

Answer 15

A: A device used to measure pressures of vapours or gases.

Question 16

Q: Gas Burners are categorized according to what three major characteristics.

Answer 16

A: Air Supply, Air Mixing and, Flame Pattern.

Question 17

Q: What are the three types of Primary Air Shutters on a gas burner.

Answer 17

A: Wing type, Butterfly and, Disc.

Question 18

Q: What is the primary purpose of a gas burner.

Answer 18

A: Deliver a gas and air mixture to the combustion zone for ignition.

Question 19

Q: 3 Major factors in determining the proper characteristics of a flame.

Answer 19

A: Colour, size and, shape.