Review Test

Question 1

Can a gas fitter B exceed 400,000 BTU

Answer 1

No

Question 2

What combustible component of natural gas is typically 95%

Answer 2

Methane

Question 3

What are oil, natural gas and coal classified as

Answer 3

Hydrocarbon

Question 4

Water to steam specific heat

Answer 4

970

Question 5

Water to ice specific heat

Answer 5

144

Question 6

What are the operating pressures of a transmission pipeline

Answer 6

300psi-1500psi

Question 7

Which substance is added to natural gas to provide its odor

Answer 7

Mercaptan

Question 8

What does LPG stand for

Answer 8

liquefied petroleum gas

Question 9

What temperature does natural gas liquify at

Answer 9

-258°F

Question 10

Boiling point of propane at atmospheric pressure

Answer 10

-44

Question 11

Natural state of natural gas

Answer 11

Gas

Question 12

What’s the heating value of natural gas

Answer 12

1000btu/cubic foot

Question 13

How much combustion air is needed for on cubic foot of propane

Answer 13

24 cubic feet

Question 14

What pressure does the home regulator reduce the propane pressure to

Answer 14

11”WC

Question 15

What pressure is gas distributed across the city

Answer 15

12-80 psig

Question 16

Canadian natural gas installation code is

Answer 16

CSA149.1

Question 17

When gas burns properly the hydrogen combines with the oxygen to produce water vapor, what is produced when the carbon combines with the oxygen

Answer 17

Carbon dioxide

Question 18

An gas fitter A can work on

Answer 18

Appliances and piping downstream of the gas meter

Question 19

Natural gas flammability range is

Answer 19

5-15%

Question 20

Chemical formula for natural gas

Answer 20

CH4

Question 21

Natural gas is lighter or heavier than air

Answer 21

Lighter

Question 22

Propane Vapour is lighter or heavier than gas

Answer 22

Heavier

Question 23

Propane chemical formula is

Answer 23

C3H8

Question 24

Min size pressure gauge when testing rough piping

Answer 24

3”

Question 25

Where and how is the standing pressure obtained from a gas furnace system

Answer 25

Between the meter and the appliance with no gas flowing

Question 26

Where and how is the manifold pressure obtained in a gas furnace

Answer 26

Between the appliance control valve and the burner while the appliance is firing

Question 27

Manifold pressure for natural gas and propane are

Answer 27

3-4 natural gas 11” propane

Question 28

What does the air shutter control

Answer 28

Amount of primary aur

Question 29

What is the purpose of aldehydes

Answer 29

Nothing that are a by product of incomplete combustion

Question 30

Three components of the combustion triangle

Answer 30

Air, fuel, heat

Question 31

What would cause a roaring and lifting flame

Answer 31

Too much primary air

Question 32

What pressure of natural gas is delivered from a service regulator to piping inside a home

Answer 32

7-14”wc

Question 33

What pressure is finish piping tested to

Answer 33

Working pressure

Question 34

Vent gases are made up of

Answer 34

Dilution air and flue gases

Question 35

When sulphur isn’t removed from gas what happens

Answer 35

Acid rain

Question 36

Propanes volume increase by how much when changing from a liquid to a Vapour

Answer 36

270X