Emergencies 2,3 nat. gas/ basic emergencies Flashcards

1
Q

Natural gas is comprised of mainly methane but also contains ethane, propane & nitrogen. What is natural gas’ explosive range,& ignition temperature?

A

Explosive range of 5%-15%
Ignition temp. of 1163 degrees fahrenheit
T.B. EMERGENCIES 2 SEC. 2

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2
Q

Are plastic & copper gas lines allowed inside structures?

A

NO

T.B. 2 SEC. 5

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3
Q

What is the priority order of shutting the gas valve off?

A

1) Appliance
2) Meter (meter valve or master meter)
3) Head of service valve ( Building service valve)
4) Exterior gas riser valve
5) Curb valve
6) Street valve
T.B.2 SEC. 7

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4
Q

When working with a curb valve before shutting it look into the valve box. If the valve is white what should you do?

A

close it gently. A white valve means that it is a plastic valve. these valves break easy w/ excessive force.
T.B. 2 SEC.7 # 6

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5
Q

Some older curb valves are gated & will require multiple turns to close. If the normal 1/4 turn doesn’t work what shall be done?

A

Turn valve until resistance is met. this may occur between 7 1/2 - 15 full turns. DO NOT TURN MORE THAN 15 TIMES.
T.B.2 SEC.7 #6

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6
Q

Which of the following are not intrinsically safe?

A

non-FDNY flashlights
FDNY TICS
DEPT. FANS
T.B. 2 SEC. 9 & SEC.11

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7
Q

When dealing with a major indoor gas leak, indicated by a heavy odor or high readings on digital meter how many exposures should you check on either side of the occupancy w/ a positive gas reading?

A

Check at least 3 exposures on both sides of the occupancies w/ positive gas readings for a presence of a odor of gas or leak including above & below the suspected leak. Evacuate & vent as needed.

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8
Q

If gas readings are obtained in electric, sewer, or any other manhole(s) what must be done?

A

Check the surrounding structures.

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9
Q

The ALTAIR meter sounds an alarm at 10% LEL & a different alarm at 20% LEL. Which is the indoor action level & which is the out door action level?

A

10% LEL is indoor action level at which we will begin evacuation if we are unable to reduce the LEL level immediately.

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10
Q

What does a series of crosses indicate under the COMB/EX & THE O2 icon on the ALTAIR meter?

A

The atmosphere is above 100% LEL.

The atmosphere is above 25% o2

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11
Q

While out on AFID L-159 encounters an open hydrant. They try to shut it down normally but are unable to do so. How should they shut it down?

A

Place wrench on fitting & turn counter clockwise 17 times.

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12
Q

T/F: Members shall not take any actions relating to removing electrical wires from people and/or vehicles until wires are de-energized by the utility co.

A

TRUE
members are not to attempt to remove people from cars or place hose on wires. also do not attempt to move wires w/rope or hook

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13
Q

When checking nearby buildings at an electrical wires down incident, how shall you check the panel for heat?

A

use a TIC. Checking by hand can result in electrocution.

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14
Q

If you stretch a handline at an electrical wire down call what type of nozzle would be attached and what is the safe distance to be from the wires?

A

Fog nozzle

25’

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