Intro To Gasfitting (140102j)

Question 1

NATURAL GAS (Methane)

1. ) Chemical Formula?
2. ) Calorific Value?
3. ) When does it become a liquid?

Answer 1

1. ) CH4
2. ) 1000 BTU/CF
3. ) At Very high pressures or Very low temperatures (-258* F)

Question 2

PROPANE (LPG)

1. ) Chemical Formula?
2. ) Boils at?
3. ) Expands how many times it’s volume from liquid to gas?

Answer 2

1. ) C3H8
2. ) -44*F
3. ) 270 times it’s volume

Question 3

BUTANE (LPG)

1. ) Chemical Formula?
2. ) Calorific Value = ?

Answer 3

1. ) C4H10
2. ) = 3200 BTU / CF

(Not commonly used in Canada)

Question 4

MANUFACTURED GAS (Methane)

1.) Calorific Value = ?

Answer 4

1.) = 500 BTU/CF

Question 5

CARBON MONOXIDE

1. ) How many PPM/hr will result in Death?
2. ) Characteristics?

Answer 5

1. ) 4000 PPM/hr

2. ) Colourless, odourless, tasteless and DEADLY.

Question 6

Where does CO (Carbon Monoxide) come from?

Answer 6

A by-product if incomplete combustion.

Question 7

What are (6) CO poisoning symptoms?

Answer 7

1. ) Headaches
2. ) Fatigue
3. ) Nausea
4. ) Dizzy Spells
5. ) Confusion
6. ) Lips May turn blue (lack of oxygen)

Question 8

**What odourant is added to Gasses for SAFETY?**

Answer 8

MERCAPTAN

Question 9

****(5) Properties of FUEL GASES

(PROPANE, METHANE, & BUTANE)****

Answer 9

1. ) Heating Value
2. ) Specific Gravity
3. ) Expansion Ratio
4. ) Latent Heat of Vaporization
5. ) Combustion Air

Question 10

Why are Natural Gas, propane, coal and oil referred to as HYDROCARBONS?

Answer 10

They consist largely as HYDROGEN and CARBON

Question 11

How is Natural Gas Formed?

Answer 11

Result of decaying organic matter (Dinosaurs and their food made it)

Question 12

Why is water removed from NATURAL GAS?

Answer 12

It could freeze forming hydrates that could plug transmission lines.

Question 13

1. ) Where does the Majority of Alberta’s electricity come from?
2. ) What are the percentages of each form of energy?

Answer 13

1. ) Coal and Natural Gas steam generation.

2. ) 55% Coal, 35% Natural Gas

Question 14

What is the NATURAL GAS steam generation process?

Answer 14

Water is heated to produce steam, steam drives turbines which turn generators to produce electricity.

Question 15

1. ) How and Where is Natural Gas Stored in Canada?

2. ) When is Demand High / Low?

Answer 15

1. ) Compressed and stored in underground salt caverns Near Fort Saskatchewan.
2. ) Demand is Low in the summer (Warmer weather) and higher in the winter (Colder weather requiring heat)

Question 16

1. ) How is Natural Gas transferred?

2. ) At what PSIG?

Answer 16

1. ) Main Transmission lines.

2. ) 300-1500 PSIG

Question 17

1. ) Where and to what PSIG is Natural Gas pressure reduced down from the Transmission pipe lines?
2. ) What is added to the gas at this point for SAFETY?

Answer 17

1. ) Pressure is reduced to 12-80 PSIG at CITY GATE STATIONS.
   * Reduced further at OLDER CITY AREAS to 8-14” W.C. (1/4-1/2 PSI)*
2. ) Mercaptan

Question 18

What does a HOME GAS METER reduce Natural Gas Pressure to?

Answer 18

7-14” Water Column (1/4-1/2 PSI)

Question 19

Who is responsible for all piping DOWNSTREAM of the gas meter?

Answer 19

A Gasfitter

Question 20

What is easily compressed to become a liquid?

Answer 20

Liquefied Petroleum Gases (LPG)

Question 21

When Natural Gas is not available for home heating, what is substituted?

Answer 21

Propane

Question 22

1. ) What PSI is Propane stored at?
2. ) 1st Stage regulator on tank provides?
3. ) 2nd Stage regulator just outside of Home provides?

Answer 22

1. ) 0-175 PSI
2. ) 2-10 PSI (Usually 10 PSI)
3. ) 11-14” Water Column

Question 23

What is the Gas and Propane Installation Code?

Answer 23

CSA B149.1

Question 24

What is the Propane Storage and Handling Code?

Answer 24

CSA B149.2

Question 25

The CSA B149.1 and CSA B149.1 are what type of documents?

Answer 25

LEGAL Documents that define the minimum standards that must be met when installing and servicing gas systems and appliances.