Emergencies 2,3 nat. gas/ basic emergencies Flashcards Preview

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Flashcards in Emergencies 2,3 nat. gas/ basic emergencies Deck (14):
1

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

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

2

Are plastic & copper gas lines allowed inside structures?

NO
T.B. 2 SEC. 5

3

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

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

4

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

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

5

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?

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

6

Which of the following are not intrinsically safe?

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

7

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?

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.

8

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

Check the surrounding structures.

9

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?

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

10

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

The atmosphere is above 100% LEL.
The atmosphere is above 25% o2

11

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?

Place wrench on fitting & turn counter clockwise 17 times.

12

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.

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

13

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

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

14

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?

Fog nozzle
25'

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