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FDNY 2020 Capt Test > Emergency Procedures: Gas > Flashcards

Emergency Procedures: Gas Flashcards

1
Q

Natural Gas:

When will the Altair alarm?

A

LEL - 10%

O2 - 23.5% (enriched)

O2 - 19.5% (deficient)

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2
Q

Natural Gas:

Normal readings in fresh air for the Altair?

LEL?

O2?

A

LEL - 0%

O2 - 20.8%

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3
Q

Natural Gas:

How long is the self check on the Altair?

A

40 seconds

10-40

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4
Q

Natural Gas:

How to perform the fresh air setup on Altair?

How to bypass the FAS?

A
  • hit “power” when prompted

- reset button or wait 10 seconds

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5
Q

Natural Gas:

OOS meter: what is the SOP?

A

Call hazmat, they will arrange replacement.

Do not put through the bag!

Do not put markings on meter!

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6
Q

Natural Gas:

Readings are above 100% LEL Gas, what does display say?

A

3 XXXs

When exceeds 100% LEL, then meter will lock and shut down the sensor.
Must be removed to fresh air and turned off/on.

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7
Q

Natural Gas:

O2 is oxygen deficient, what is the SOP?

When it 02 meter reads ttt, what does that mean?

A

Below 19.5% is O2 deficient - and members should don SCBA and notify IC. Also notify dispatch and request ETA

Alarms at 23.5 (decreases flash points of combustibles)

3 large ttt indicates atmosphere is above 30% O2 and is extremely dangerous (actual readings are not known)

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8
Q

Natural Gas:

Intrinsically safe fans

How to plug them in?

Who utilized them?

A

Plug in before turning them on.

Soc members (haz May tech units)

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9
Q

Natural Gas:

Sensit defector

Will detect as low as how many PPM?

Illuminates what when charging? Fully charged?

A

20 PPM

Red when charging

Green when fully charged

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10
Q

Natural Gas:

Sensit detector

How long does fully charged battery last?

How long does it take to charge?
What indicates it needs to be charged?
Notify hazmat about faulty charging when?

A

20 hours.

Takes 2-5 hours to charge

When it blinks green or doesn’t illuminate then you need to charge it.

If it does not produce a solid green after 5 hours of charging, all hazmat.

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11
Q

Natural Gas:

Sensit defector

How does it indicate you are approaching a leak?

SOP for approaching a leak?

A

Increase in ticking, flashing red.

As ticking increases, turn counter clockwise until ticking increases again and so on until you find the leak.

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12
Q

Natural Gas:

Sensit detector

OOS SOP?

How to store on the rig?

A

Call hazmat.

Do not put through bag

Hazmat replaces ion battery.

MUST BE STORED IN CARRYING CASE

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13
Q

Natural Gas:

What is the explosive range?

Lighter or heavier than air?

What is added to give it a rotting smell?

A

5% to 15%

Significantly lighter than air

Mercaptan

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14
Q

Natural Gas:

Can we operate at the utility companies gate stations?

A

Actions limited to life-saving and protecting exposures until company has been consulted

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15
Q

Natural Gas:

Main valve covers are larger or smaller than curb valve covers? What shape are they?

A

Larger than curb valve and can be round or square

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16
Q

Natural Gas:

What psi are at low pressure distribution means?

Do they generally have valves for isolating sections of low pressure?

How do we shut them off?

A

1/4 psi

Generally do not have valves; they require plugging or squeezing off the pipe, only the utility company can safely do this (sparking hazard)

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17
Q

Natural Gas:

What size are the valve covers and where are they?

National grid’s location?

A

4” x 4” square or round cover, usually found on the sidewalk side of the curb

National grid: sometimes located across the street from the building at supplies, can be in the street. Identified by arrow cast into cover pointing to the building it’s supplies.

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18
Q

Natural Gas:

What does NC stamped on a tag near the service meter indicate?

What does EFV indicate?

A

No curb valve or service valve

Excess flow valve exists in line on the service pipe

If there is an exterior gas service valve present no curb valve is required

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19
Q

Natural Gas:

What is the typical house appliance pressure?

Commercial customer pressure?

A

1/4 psi

1-3 psi

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20
Q

Natural Gas:

Where are service regulators located?

A

Usually before the gas meter. (Hass to be in order to reduce pressure to your house)

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21
Q

Natural Gas:

If there is more than one master meter, can you shut only one down?

A

Must shut both down to close supply to building

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22
Q

Natural Gas:

What is the FDNY strategy at a major gas emergency?

A

Life safety

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23
Q

Natural Gas:

What LEL detected outside or inside indicates a major gas emergency?

What LEL detected in a sub surface (manhole, sewer) indicates a major gas emergency?

A

10%

20%

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24
Q

Natural Gas:

Gas leaking from where indicates a major gas emergency?

A

Two or more sub surface structures (I E manhole)

Gas migrating into a building from outside source

Gas leaking inside, and controlling valve is broken or can’t be located

Gas leaking or present inside a wall or void

25
Q

Natural Gas:

What is the typical response time for utility companies?

A

Within 30 minutes

26
Q

Natural Gas:

SOP if strong odor is present on approach?

Apparatus positioned where?

Where should additional unit stage?

A

Stop and meter

Away from reported leak position

Staged at street corners, only enter block when appropriate

27
Q

Natural Gas:

Where should you not use the gas meter?

Where should you use it?

A

At an appliance pipe or crack; high levels of gas or expected at these locations.

High and in the middle of the room. (This is the percentage to be reported to the ic)

28
Q

Natural Gas:

What’s the first priority at gas emergencies?

A

To ensure it is not a Major Gas Emergency.

29
Q

Natural Gas:

What LEL is indicative of a major gas emergency?

A

10% outside or inside
-or-
20% in an unvented subsurface structure

(Or present in 2 or more subsurface structures)

30
Q

Natural Gas:

Indications of a major gas emergency?

A

Damage to infrastructure

10% outside or inside

20% subsurface structure

Gas in two + subsurface structures

Migrating into a building

Inside leak and valve is inoperable

Leaking inside a wall or void

31
Q

Natural Gas:

Can you leave the scene once an order of gas has dissipated?

A

Not without coordination with the utility company

32
Q

Natural Gas:

If gas is in an HVAC system where should you examine?

A

Rooftop and setback equipment.

Shut down fans and see if ordered dissipates (indicates leak at equipment)

33
Q

Natural Gas:

Inside team:
What should you do if any levels are displayed on the gas meter when entering the building?

A

Proceed directly to the basement to evaluate

34
Q

Natural Gas:

Where should the outside team go?

A

To the utility meter room

35
Q

Natural Gas:

What is the main mission, and the secondary mission?

A

Ensure there is not a major leak

Mitigate minor leagues

36
Q

Natural Gas:

How do you remove ignition sources near the leak?

A

Via a remote shut off. Removing power will cause a spark at the switch which should only be done outside the area where the leak is.

37
Q

Natural Gas:

How can you stop a leak in a low pressure gas pipe?

A

Taping, potty, rags, paper etc.

38
Q

Natural Gas:

How do you turn natural gas shut off’s?

A

Quarter turn counterclockwise

39
Q

Natural Gas:

Can we should master meters?

A

Yes, one possible avoid shouting it. If possible notify utility company and inquire about alternatives

40
Q

Natural Gas:

Can we shut the curb valve/service valve?

A

Only as a last resort and in consultation with utility company

41
Q

Natural Gas:

How do we shut a curb valve?

A

Use chalk or another Mark near the valve to indicate start point; quarter turn

42
Q

Natural Gas:

Can we shut the main valve?

How can you tell difference between a curb valve and a main valve?

A

No, also it is difficult to discern between a curb valve and a main valve.

Curb valves usually on the curb, main valve is usually in the street.
Curb = usually 4x4
Main = usually 9” or larger

43
Q

Natural Gas:

What are your trans rate for a major gas emergency?

A

10-75 and 10-80 code 1 and specify major gas emergency

44
Q

Natural Gas:

What to do with natural gas ignites?

A

Do not extinguish the fire, cool adjacent structures

Avoid operating into an excavation

45
Q

Natural Gas:

What’s the due for a subsurface leak?

A

Mark potential blast zone with red tape: danger do not enter tape; announce potential blast zone over handy talkie and department radio

46
Q

Natural Gas:

What percentage LEL can you still operate at an inside Leak?

If it reaches above their percentage then what?

A

80% You can still operate;

Above 80 treat as a potential blast zone, or if it has been leaking and likely trapped in void space

47
Q

Natural Gas:

If you can’t find the leak, when should you treat it as a potential blast zone?

A

Cannot be limited to less than 10% LEL, and there are indications leak is coming from an outside subsurface source

48
Q

Natural Gas:

Should we allow other agencies and saw the potential blast zone?

A

Not unless they are involved in direct life-saving procedures

49
Q

Natural Gas:

Can we enter a potential blast zone to remove ignition sources or vent?

A

No, all we can do is evacuate that’s it

50
Q

Natural Gas:

What tools are intrinsically safe?

A

Handy talkie
Gas detector
Gas meters
Flashlights issued by fdny

51
Q

Natural Gas:

What is not intrinsically safe?

A

TIC
Fans
Cell phones
Megaphones

52
Q

Natural Gas:

What mode of evacuations should we not use?

Can we force entry?

A

Elevators should not be used

FE should be avoided except for known life hazard

53
Q

Natural Gas:

What type of forcible entry is permitted?

A

Adze end and hydra ram. Striking the Halligan with an ax is not permitted

54
Q

Natural Gas:

Can you use elevators at all?

A

Yes when evacuating civilians from a high-rise. Elevators in the potential blast zone or not to be used

55
Q

Natural Gas:

When can you use a fog stream at a gas leak?

A

To protect workers placing a plug. Should not be used to dissipate gas; let the gas vent naturally

56
Q

Natural Gas:

When can you remove power from the area of a leak?

A

Before readings reach 80% LEL

57
Q

Natural Gas:

Can you shut power when unable to locate the source of the leak?

A

No

58
Q

Natural Gas:

Sewer manhole: who approves?

Round electric manhole: who approves?

A

On scene chief officer

On scene chief officer, requested by on scene utility worker. Must be free of stray voltage

59
Q

Natural Gas:

When can you not pull an electric manhole cover?

A

If a manhole fire is in the area; if Smoking or arcing is observed in an electric manhole or transformer

FDNY 2020 Capt Test (36 decks)

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