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TFD BC > Natural Gas > Flashcards

Natural Gas Flashcards

1
Q

Where is natural gas found and in what form is found?

A

Underground

Gaseous

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2
Q

What is natural gas composed of?

A 
85% methane
11% ethane
2% nitrogen
1% carbon dioxide
1% other gases ( sulfur, propane, butane, oxygen, helium)
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3
Q

What are the characteristics of natural gas?

A

Colorless
Odorless
Non-toxic

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4
Q

Why does natural gas smell?

A

Ethyl Mercaptan is added to give the gas a rotten egg smell

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5
Q

What is the vapor density of natural gas?

A

.65

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6
Q

What is the vapor density propane?

A

1.55

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7
Q

What is the vapor density of butane?

A

2.0

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8
Q

What is the vapor density of ether?

A

2.55

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9
Q

What is the ignition temperature of natural gas?

A

1200°F

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10
Q

What is the ignition temperature of propane?

A

950°F

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11
Q

What is the ignition temperature of butane?

A

900°F

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12
Q

Was the ignition temperature of ether?

A

365°F

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13
Q

What is the LEL/UEL of natural gas?

A

4% – 14%

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14
Q

What is the LEL/UEL of propane?

A

2.4% – 9.5%

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15
Q

What is the LEL/UEL of butane?

A

1.8% – 8.4%

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16
Q

What is the LEL/UEL of ether?

A

1.9% – 48

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17
Q

Where does Southwest Gas distribute natural gas to customers?

A

Arizona
California
Nevada

18
Q

High-pressure mains carry gas up to ____ psi

A

1000 psi

19
Q

Southwest Gas considers any line over ___ psi to be high-pressure

A

60 psi

20
Q

Regulation stations reduce high pressures from mains down to ___–___psi

A

30 – 60 psi

21
Q

What psi do distribution lines to home flow at?

A

30 – 60 psi

22
Q

What is a residential regulator?

A

Same thing as a gas meter

23
Q

A residential regulator/gas meter drops pressures to what PSI as it enters the home?

A

1/4 psi

Some appliances in the home then regulate that pressure down to 1/8 psi

24
Q

Water the two materials that gas pipes can be made out of?

A

Steel

Polyethylene

25
Q

Gas pipes different sizes and colors and may have a ____ to protect actual line

A

Sheath

26
Q

TFD and SWG have a good ____ ____

A

Working relationship

27
Q

Who ultimately has the authority at an incident involving a gas leak?

A

TFD

28
Q

What will TFD do while Southwest Gas employees are on scene?

A

TFD will deploy resources to protect/evacuate the public and will protect the Southwest Gas employees

29
Q

What is a typical gas leak response for TFD?

A

Engine

Ladder company

30
Q

On a gas leak seem, you should determine the wind direction and approach ___ wind

A

Up wind

31
Q

True or false…

You should shut down any equipment left on scene

A

FALSE

Do not shut down any equipment left on scene

32
Q

What are the 4 things that we notify SWG via fire alarm?

A

Actual address
Nature of the emergency
Location of the command post
Directions for entering the area

33
Q

What is the general rule for what a hot zone is defined as?

A

Any area where odor is present

34
Q

Evacuate ___ wind occupancies

A

Down wind

35
Q

What kind of PPE is used in the hot zone?

A

Full PPE with SCBA

36
Q

What does SWG utilize for protection?

A

Dry chemical extinguisher

37
Q

How do we reduce static electricity in an area?

A

Pull 1 3/4 line and wet down the area with a fog pattern

38
Q

If damage is ___ to a shutoff valve TFD can shut down the gas supply but must remain…

A

Distal

On scene until SWG arrives

39
Q

What is LPG?

A

Liquefied Petroleum Gas

40
Q

LPG is usually what gas?

A

Propane

41
Q

Is propane heavier or lighter than air?

A

Heavier

42
Q

One vehicles running on LPG or CNG they are not required to have any…

A

Markings indicating alternative fuel being used

TFD BC (26 decks)

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