Natural Gas

Question 0

Methane has no toxic components or health hazards associated with it. But in heavy concentrations it will do what?

Answer 0

Displace oxygen

Question 1

What is the vapor density of methane?

Answer 1

.55 so it’s lighter than air

Question 2

What is the odorant that is added to natural gas as a safety precaution?

Answer 2

Mercaptan

Question 3

Are transmission pipelines and railcars odorized with mercaptan?

Answer 3

No

Question 4

What is the flammable range for natural gas?

Answer 4

5% and 15%

Question 5

The primary objective during a natural gas leak is to control the leak by _____.

Answer 5

Shutting off the gas to the specific appliance if possible or shutting off the gas to the entire structure

Question 6

What needs to be done if the fire department shut the gas off to a residence or business?

Answer 6

It needs to be tagged appropriately in the utility company notified

Question 7

After the leak has been secured and ventilation has taken place what is the next step before turning the residents over to the homeowners?

Answer 7

Firefighters should repeat the monitoring process to ensure that no hazards exist before turning the scene over to the property owner

Question 8

What information is located on a marking sign for natural gas pipeline?

Answer 8

What is being transported
The name of the pipeline
Telephone number

Question 9

Where can natural gas leaks be detected if the the damaged line is in a void space?

Answer 9

Around light switches and electrical outlets

Question 10

What is the proper sequence for shutting off the utility in either a leak or a fire situation?

Answer 10

1- at the appliance
2- at the meter
3- at the curb box

Question 11

In commercial gas leaks where is the location of the valve that needs to be shut off to secure the gas?

Answer 11

It’s located prior to the regulator.

Question 12

For outside gas leaks and other outside guess emergencies that engine company sell position where?

Answer 12

Prior to an upwind of the hazard areaand identify a adequate water supply

Question 13

The general rule for apparatus positioning is no closer than ____ feet from the incident.

Answer 13

100’

Question 14

Besides the first due engine company what is the minimum distance that the other units should position

Answer 14

300’

Question 15

If personnel have an odor present when arriving on scene what should be done with the apparatus?

Answer 15

The apparatus shall be moved immediately

Question 16

On a gas leak where should the 2nd Engine stage at?

Answer 16

At a hydrant outside of the hot zone and await orders from the initial crew before taking any action

Question 17

Crews should avoid parking their vehicles over what during a gas leak?

Answer 17

Sewers, valve covers, and manhole covers.

Question 18

During inside gas leaks where shall apparatus avoid parking at?

Answer 18

Avoid parking next to any side of the affected address. Units should not positioned directly in front of to the rear of or beside a building involved in a gas leak event.

Question 19

If they outside gas leak is reported to be over a 2 inch line what should the incident commander do?

Answer 19

Upgrade to a hazardous materials response.

Question 20

During an outside gas leak in the engine company is responsible for what?

Answer 20

Identifying a water supply, locate and secure the leak, and evacuate citizens.

Question 21

What responsibilities does the first rescue or truck have on a outside gas leak?

Answer 21

Ventilation, metering, investigation of the exposure, and assisting the initial crew with their assigned task.

Question 22

The officer of the first arriving unit shall do what on the outside gas leak?

Answer 22

Re-con The soon to determine the location and extent of the leak through eight on scene supervisor, contractor, or the person who reported the leak.

Question 23

Who shall be called on all active gas leaks?

Answer 23

The utility company.

Question 24

When is the only time fire department personnel can cramp or clamp a gas line?

Answer 24

And extreme life-saving situations.

Question 25

In most cases if the leak is prior to a shut off what actions should be done?

Answer 25

No action

Set up a hot zone and wait for the utility company

Question 26

To protect the utility company workers unit should position upwind with what equipment?

Answer 26

20lbs dry Chem extinguisher

Charged hose line

Question 27

When protecting the utility company you should position your personnel where?

Answer 27

Close to the leak but out of the immediate hazard area if the gas ignites.

Question 28

Should fire department personnel operate Street valves?

Answer 28

No

Question 29

If a gas valve has been turned off do fire department personnel turn the valve back on.

Answer 29

No

Question 30

For instances where the leak cannot be controlled by fire department personnel what should the first officer do?

Answer 30

Confirm the respective utility company is in route, establish hot and cold zones for the operation, and isolate the area.

Question 31

What is the ERG recommended evacuation distance for natural gas leaks?

Answer 31

330’

Question 32

How will the officer determine the hot zone distances?

Answer 32

By using detection and monitoring equipment.