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LT Promotional Test 2023 > Utility Emergencies > Flashcards

Utility Emergencies Flashcards

1
Q

Electric, cable, conduit, lighting cable utility marking color is

A

Red

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2
Q

Gas, oil, steam, petroleum, or gaseous material utility marking color is

A

Yellow

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3
Q

Communications, alarm, or signal lines, cable or conduit utility marking color is

A

Orange

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4
Q

Potable water utility marking color is

A

Blue

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5
Q

Reclaimed water, irrigation and slurry lines utility marking color is

A

Purple

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6
Q

Sewer and drain lines utility marking color is

A

Green

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7
Q

Temporary survey markings utility marking color is

A

Pink

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8
Q

Proposed excavation utility marking color is

A

White

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9
Q

A simple hydrocarbon consisting of carbon and hydrogen

A

Methane

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10
Q

The weight of a given volume of gas compared to the weight of the same amount of air at the same temperature and pressure is

A

Vapor density

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11
Q

A pungent oderant that is added to natural gas as a safety precaution after it is received at the distribution site is

A

Mercaptan

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12
Q

The expansion ratio of liquefied natural gas to a gas is what

A

600:1

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13
Q

Gas lines typically have operating pressures of _____ to _____ pounds per square inch (PSI)

A

0.25 ; 55

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14
Q

Gas transmission lines range in size from ____ to _____ and have pressures up to 450psi

A

6” ; 30”

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15
Q

Pipeline markers show what

A

The approximate location

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16
Q

Signs on pipeline markers list what

A

The commodity transported, the name of the pipeline company, a telephone number

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17
Q

A pipeline sign that is and orange triangle on a stick is used for what

A

Aerial Reconnaissance

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18
Q

Gas shut off for leaks should be done in what order

A

1 At the appliance
2 At the meter
3 At the curb box

19
Q

For gas leaks the first arriving unit should position where

A

No closer than 100 feet and upwind if possible

20
Q

For gas leaks where should all incoming fire apparatus other than the first arriving unit position

A

Minimum distance of 300 feet

21
Q

For gas leaks units should not position where

A

front of, to the rear of, or beside a building involved in a gas leak event

22
Q

If a break in a gas line is over _____ inch diameter the incident should be upgraded to a hazmat response

A

2 inch

23
Q

The initial alarm assignment for outside gas leaks should consist of a minimum of

A

1 engine company
1 truck or rescue

24
Q

Fire department personnel shall ensure no persons enter a trench deeper than _____ feet that is not shored

A

5 feet

25
Q

To protect the utility company workers, units should position upwind with what

A

A 20lb dry chem extinguisher and a charged hoseline when necessary

26
Q

The DOT ERG suggests an evacuation distance of _____ feet for gas leaks

A

330 feet

27
Q

In situations where you cannot find the leak you can do what to help pinpoint the source in piping and meters

A

Use a soapy water spray

28
Q

In extreme cases the fire department can perform clamping or crimping a leak. This should only be done for what size lines

A

3/4” or smaller

29
Q

The initial alarm assignment for inside gas leaks should consist of the following

A

2 engine companies
1 truck or rescue
1 BC

30
Q

The gas regulator takes street pressure of up to _____ PSI and steps it down to somwehere between ________

A

40 PSI ; 1/2-1/4 PSI

31
Q

In newer occupancies because of the longer distance for gas to go it may be at a pressure of what

A

2-5PSI

32
Q

Two basic types of gas meters are

A

Inside & Outside

33
Q

Is a fossil fuel that is found mixed with natural gas and petroleum deposits

A

Propane

34
Q

Propane has an expansion ratio of

A

270:1

35
Q

The vapor density of propane is

A

1.56 so it sinks

36
Q

DOT states a person with a normal sense of smell should be able to detect a concentration in air of what

A

20% of the LEL

37
Q

The relief valve of a propane tank is designed to operate and release pressure when the internal pressure exceeds what

A

250 psig

38
Q

Is formed by the incomplete combustion of the fossil fuels

A

Carbon Monoxide (CO)

39
Q

At incidents where an individual is in a vehicle that has downed power lines you should stay how far away

A

30 feet

40
Q

Pole numbers have two lines that are what

A

Top line is the map grid for the pole
Bottom line is the specific pole #

41
Q

To be proactive for underground electric vaults crews can do what

A

Ventilate while waiting for the power company

42
Q

Firefighters should stay clear of manhole covers over underground electrical vaults as they have been known to blow off and flay as far as what

A

150 feet

43
Q

For water emergencies the main supply valve is typically found where

A

In the basement or utility room

LT Promotional Test 2023 (29 decks)

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