Natural Gas Emergencies Flashcards

1
Q

Whenever Portland fire is dispatched to a natural gas incident who is also dispatched?

A

Northwest Natural

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2
Q

At what natural gas level should you withdraw?

A

When natural gas levels reach 1% volume

(20 reading on air monitor)

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2
Q

What is the flammable range of natural gas?

A

5 to 15%

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3
Q

Are Portland fire Personnel allowed to close gas meter riser valves?

A

Yes

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4
Q

Can Portland fire Personnel restore gas service?

A

No

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5
Q

What are the three types of gas pipe found in the Portland area?

A
  1. Steel
  2. Direct buried poly
  3. Poly inserted in casing
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6
Q

CNG is stored at what psi?

A

3000

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7
Q

How is a CNG vehicle marked? LNG?

A

Blue diamond shape sticker with silver border and says CNG. Same but LNG

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8
Q

What is LNG being used to power?

A

Only PUBLIC transportation

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9
Q

What temperature is LNG stored at?

A

-260° f

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10
Q

On a natural gas incident, restrict vehicles and pedestrians how far from site?

A

Within 1 block (300’) of site

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11
Q

Attempting to do anything prior to the arrival of NW Natural should only be what?

A

Closing gas meter RISER VALVES

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12
Q

Is Natural gas heavier or lighter than air?

A

LIGHTER

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13
Q

A DISTRIBUTION gas line is what psi?

A

LOWER than 50

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14
Q

Can we close a gas line located on the customer side of property or the street valve?

A

NEVER street. Customer side only

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15
Q

DO NOT extinguish a burning natural gas leak outside of a structure. If you absolutely have to, extinguish it with what?

A

A DRY CHEMICAL extinguisher

16
Q

How much flow reduction will a Excess flow device check valve reduce?

A

Reduce by 95%

(some still leaks so it can be detected)

17
Q

How will you know if a gas line is equipped with an excess flow device?

A

Diamond hole stamp on metal washer on riser

18
Q

When will excess flow devices be installed on all new construction?

A

Beginning JAN 1999

19
Q

What vehicles are more common, CNG or LNG?

A

CNG

20
Q

Do you dissipate or dike LNG?

A

Dike