SNFO 07: Natural Gas Emergencies

Question 1

natural gas is primarily composed of what?

Answer 1

methane

Question 2

is natural gas lighter than air?

Answer 2

yes

Question 3

natural gas flashpoint?

Answer 3

1200F

Question 4

natural gas flammable range?

Answer 4

4-14%

Question 5

does natural gas dissipate rapidly outside?

Answer 5

yes

Question 6

where does natural gas tend to pocket in buildings?

Answer 6

attics, dead spaces

Question 7

should burning natural gas be extinguished?

Answer 7

not normally

Question 8

natural gas fires should be controlled how?

Answer 8

stoping the flow of gas

Question 9

what PPE will be required for responses to gas leaks?

Answer 9

full PPE

Question 10

what should be established around any suspected gas leak?

Answer 10

hot zone

Question 11

apparatus placement should be _____ of any potential vapor cloud.

Answer 11

upwind

Question 12

if the leak is above ground and the officer feels like the leak can be controlled, what needs to be on the ground?

Answer 12

hand line

Question 13

NAERG guideline for gas leak distance?

Answer 13

330ft in all directions

Question 14

secure all _____ gas shutoff valves before attempting to locate the source of the gas and any other shutoff devices.

Answer 14

known

Question 15

when a leak is inside the building, where should the gas be shut off?

Answer 15

at the meter

Question 16

what will a meter possibly show if there is a gas leak?

Answer 16

spinning meter

Question 17

what should command do with a meter until repairs are made?

Answer 17

red tag out of service

Question 18

if there is any indication of gas accumulating inside the building, what needs to be done?

Answer 18

control ignition sources

Question 19

do not shut down power from an outside breaker unless FD has what?

Answer 19

has the appropriate gas meter

Question 20

personnel should ensure that blowers are not placed in an _______ enviroment.

Answer 20

explosive

Question 21

if the gas company must excavate to fix a leak, what must FD have?

Answer 21

1 3/4 on the ground

Question 22

in the event that there is equipment running in the area, what should you do?

Answer 22

leave them running

Question 23

units arriving at an explosion must consider what as a cause?

Answer 23

natural gas

Question 24

if a gas concentration is encountered inside, adjacent to, or underneath any building, what needs to be secured?

Answer 24

all ignition sources

Question 25

the ____ must be eliminated before shutting off any electrical breakers to the individual home.

Answer 25

LEL

Question 26

under fire conditions, the breaker should only be shut off when personnel entering the structure could be _________ by not securing the power.

Answer 26

endangered

Question 27

who is responsible for locating, and eliminating leaks in the gas system?

Answer 27

gas company