Sait Refrigeration Heating, 1St Year

Front 1

Difference between direct fire and indirect fire MUA

Back 1

Indirect fire has a heat exchanger

Front 2

Natural gas, Propane, Cole and Oil are referred to as?

Back 2

Hydro Carbons

Front 3

Water is removed from the gas to prevent _______________ from forming.

Back 3

Hydrates

Front 4

What does natural gas need to become a liquid?

Back 4

Very high pressure or very low temperature (-258°F)

Front 5

Where is most of Canada's natural gas found?

Back 5

The western region

Front 6

Where does the majority of Alberta's electricity come from?

Back 6

Coal, Natural Gas, Steam

Front 7

How is Natural gas transferred?

Back 7

Through main transmission pipelines @ 300-1500psig

Front 8

Home gas meter reduces the gas pressure to___________

Back 8

7"-14" WC

Front 9

Who is responsible for piping downstream of the gas meter?

Back 9

Gas Fitter

Front 10

What's gas is used to heat a home if Natural gas is not available?

Back 10

Propane or butane, propane being more common.

Front 11

1st stage regulator provides how much pressure?

Back 11

2-10psi

Front 12

2nd stage regulator provides how much pressure?

Back 12

11" WC

Front 13

Propane boils at what temperature at normal atmospheric pressure?

Back 13

-44°F

Front 14

What happens to propane when it boils (evaporates)?

Back 14

It expands to 270 times it's original volume.

Front 15

What is the specific gravity of a gas?

Back 15

How dence it is compared to air.

Front 16

What is the specific gravity of a liquid?

Back 16

How dence it is compared to water.

Front 17

What is in the combustion triangle?

Back 17

Fuel, Oxygen, Heat

Front 18

How much air does natural gas require for proper combustion?

Back 18

10ft3 of air per 1ft3 of natural gas.

Front 19

How much air is required for complete combustion of natural gas?

Back 19

14ft3

Front 20

How are gas burners categorized?

Back 20

By how the air is mixed with the flame.

Front 21

In aerated burners, where does the air mix with the flame?

Back 21

Upstream of the point of ignition.

Front 22

In a non-aerated burner, where does the air mix with the flame?

Back 22

Gas is supplied to the combustion area without being mixed with air before it is ignited.

Front 23

In an atmospheric burner, how is air supplied to there burner?

Back 23

By atmospheric pressure.

Front 24

Blue flame with inner cone indicates?

Back 24

Proper combustion.

Front 25

Yellow flame indicates?

Back 25

Incomplete combustion and CO formation (not enough primary air, too much gas)

Front 26

Orange flame indicates?

Back 26

Dust in flame, common after burner cleaning.

Front 27

What does it mean if the flame is lifting?

Back 27

Too much primary air/gas pressure too high.

Front 28

What is the remedy for a flame with yellow tips?

Back 28

More primary air.

Front 29

What is the most common type of burner?

Back 29

Aerated burner.

Front 30

Boiling point of Natural Gas (CH4)

Back 30

-258

Front 31

Ignition temp. of Natural Gas

Back 31

1200

Front 32

Flame temp. Of Natural Gas

Back 32

3350

Front 33

Calorific value of Natural Gas

Back 33

1000

Front 34

Combustion air required for Natural Gas

Back 34

10 (FT3)

Front 35

Specific gravity of Natural Gas

Back 35

0.6

Front 36

Specific gravity of Propane

Back 36

1.5

Front 37

Calorific value of Propane

Back 37

2500

Front 38

Boiling point of Propane

Back 38

-44

Front 39

Ignition temp. of Propane

Back 39

950

Front 40

Combustion air required for Propane

Back 40

24 (FT3)