[D2L] 102J&K

Question 1

How many BTU’s in any kind of residential, commercial, or industrial gas system, including any gas appliciance does a (B) gas fitter adhere to?

Answer 1

Does not exceed 400,000 BTU

Question 1

Where are most of Canada’s natural gas reserves?

Answer 1

Western region of the country

Question 2

Which gas is C3H8?

Answer 2

Propane

Question 3

What combustible component of natural gas is typically 95%?

Answer 3

Methane

Question 4

What are oil, natural gas and coal classed as?

Answer 4

Hydrocarbon

Question 5

All gas contains water, which must be removed at the wellhead because it would freeze forming “hydrates”.

T or F

Answer 5

True

Question 6

What range is the operating pressures of transmission pipe lines?

Answer 6

300 psi - 1500 psi

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

Answer 9

7”-14” WC

Question 10

What temperature does natural gas need to be at atmospheric pressure need to be in order to liquefy?

Answer 10

-258 F

Question 11

What is the boiling point of propane at atmospheric pressure?

Answer 11

-44 F

Question 12

What is the natural state of natural gas?

Answer 12

Gas

Question 13

What is the heating value of natural gas?

Answer 13

1000 btu/cuft³

Question 14

How much combustion air is needed for perfect combustion of one cubic foot of propane?

Answer 14

24 cuft³

Question 15

How much excess air is required to ensure complete combustion?

Answer 15

40%

Question 16

Regulators of propane tanks drop the pressure between 5-10psi. What pressure does the home regulator reduce the pressure to?

Answer 16

11” wc- 14” wc

Question 17

Each atom of natural gas (methane) is made up of carbon and __________.

Answer 17

Hydrogen

Question 18

What is the Canadian Natural Gas and Propane installation code book?

Answer 18

CSA-B149.1

Question 19

When gas burns properly, the hydrogen combines with the oxygen of the air to produce water vapour. What is produced when the carbon combines with the oxygen?

Answer 19

Carbon Dioxide (CO²)

Question 20

How many cubic feet of natural gas are required to produce 400,000 btu?

Answer 20

400 cuft³

Question 21

How much combustion air would be required for perfect combustion of 250,000 btu of natural gas?

Answer 21

???

Question 22

How much combustion air would be required for perfect combustion of 200,000 btu of propane gas?

Answer 22

1920 cubic feet

Question 23

How many cubic feet of propane gas is required to produce 350,000 BTU?

Answer 23

140

Question 24

What are the rough in piping pressure testing requirements for most residential piping systems (2 psi max pressure and less than 200 feet of piping)?

Answer 24

15 psi for 15 minutes

Question 25

What type of gas would concentrate at floor level if it were to leak out of a pipe?

Answer 25

Propane

Question 26

Where is the hottest part of a flame?

Answer 26

At the tip of the inner cone

Question 27

What flame color indicates incomplete combustion?

Answer 27

Yellow

Question 28

Max Flame Temperature for Natural Gas is

Answer 28

3350 F

Question 29

A burner has an output rating of 70,000 BTU. What will the input rating be if the output rating is 80% of the input rating

Answer 29

87,500

Question 30

How long would it take to raise a 70Gal, 40,000BTU hwt from 50F to 130F

Answer 30

1.4

Question 31

A BBQ propane tank holds 4.6 Gal of propane, If your BBQ is a 26,500 BTU BBQ how long will the tank last at max heat?

Hint: 1 Imp Gal = 109,560 btu’s

Answer 31

19hrs