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2023 Lieutenant Test > Utilities Manual > Flashcards

Utilities Manual Flashcards

1
Q

What is the Upper Explosive Limit (UEL) of Propane?

A

9.5

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2
Q

What is the best procedure when a propane tank is venting and the escaping product is burning?

A

Cool the tank at the vapor space

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3
Q

The explosive range of Carbon Monoxide is ____ and _____.

A

12.8% (LEL); 74% (UEL)

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4
Q

Any structure should be immediately evacuated if the CO level is ____ ppm or above.

A

35

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5
Q

What is the minimum limit of approach for a power line with 50,000 volts?

A

10 feet

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6
Q

What is the safest insulator for electricity?

A

Distance

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7
Q

How far away should you stay from a vehicle that has down wires on it?

A

30’

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8
Q

On a power pole there are two lines of numbers, what does the top line indicate?

A

Map Grid

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9
Q

On a power pole there are two lines of numbers, what does the bottom line indicate?

A

Specific pole number

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10
Q

The ___________ is a wooden bar located at the top of a utility pole. It keeps the power lines separated by a sufficient distance to prevent arching.

A

Cross Arm

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11
Q

Per APWA, a RED marker/flag indicates which of the following utility:

A

Electric, cable, conduit and lighting cable

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12
Q

Per APWA, a PURPLE marker/flag indicates which of the following utility:

A

Reclaimed water, irrigation and slurry lines

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13
Q

What is the flammable range for natural gas?

A

5% - 15%

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14
Q

What does the acronym BLEVE stand for?

A

Boiling Liquid Expanding Vapor Explosion

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15
Q

If a break is in a line that is reported to be over __ inches in diameter, the incident should be upgraded to a hazardous materials response because of the increased risk of large amounts of escaping flammable gasses.

A

2”

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16
Q

The proper sequence for shutting off the utility in either a leak or fire situation is:

A

At the appliance (if safe), at the meter, at the curb box

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17
Q

To protect the utility company workers, units should position upwind with ______ when necessary:

A

20lb dry chemical extinguisher and a charged hoseline

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18
Q

For outside gas leaks, the DOT Emergency Response Guide (ERG) suggests an evacuation distance of:

A

330 feet

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19
Q

Fire department personnel may perform clamping or crimping of a leak when:

A

Only in extreme cases for lines that are 0.75” or smaller

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20
Q

When should the gas be turned off at the curb box?

A

In the event that the shut-off on the inside of a residential installation cannot be operated due to fire or accessibility

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21
Q

For outside propane tank fires or tanks that are exposed to fire, the initial attack line should be:

A

1.75” along with an additional backup 1.75” line

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22
Q

NIOSH has established ___ ppm of Carbon Monoxide as the acceptable level for commercial buildings

A

35

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23
Q

If the detection/monitoring equipment shows a reading of __ ppm of CO, the occupancy shall be immediately evacuated, and crews should retreat and don their SCBA

A

35

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24
Q

At an incident where an individual is in a vehicle that has downed wires, personnel should stay how far away from the vehicle until power can be locked out

A

30 feet

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25
Q

The primary method for ventilation in an inside gas leak is_______?

A

Natural

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26
Q

The piping vent pipe will be within____ of the vent on an inside wall?

A

5 feet

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27
Q

What is the initial alarm for an inside gas leak?

A

2 engine companies, 1 truck or rescue, 1 Battalion Chief

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28
Q

A device which provides transition between underground power cables to overhead lines or conductors?

A

Pothead

29
Q

APWA color codes underground utilities. What does yellow specify?

A

Gas, oil, steam, petroleum, or gaseous materials

30
Q

To direct and disperse vapor clouds away from the ignition source on an outside propane tank leak, it is recommended that _______ be deployed?

A

(2) 1¾ hand lines on a narrow fog

31
Q

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

A

5 feet

32
Q

A vapor density less than 1 indicates that a gas or vapor will?

A

Rise in air

33
Q

If the fire department must turn off the sprinkler system to a commercial building, proper notifications shall be made to?

A

Fire inspection division/department or fire marshal’s office

34
Q

Per APWA, a PINK marker/flag indicates which of the following utility:

A

Temporary survey markings

35
Q

Natural gas (methane) has a flammable range of _______ - ________%

A

5 - 15%

36
Q

Personnel shall don their SCBA if they encounter carbon monoxide readings greater than ______ppm within a structure.

A

35

37
Q

230,000 to 500,000 volt electrical lines have an absolute limit of approach of _________ feet.

A

25’

38
Q

At an incident where wires are on a vehicle, generally accepted rules for safe distance is to keep people back at least _______ times the distance between poles.

A

1 ½

39
Q

The ___________ space is an intermediate space located between regular-use floors, commonly located in hospitals and laboratory-type buildings to allow space for the mechanical systems of the building.

A

Interstitial

40
Q

Mercaptan is added to natural gas at the;

A

Distribution site (Gate Station)

41
Q

If an IDLH atmosphere is identified while investigating an inside gas leak a/an ____________ shall be identified.

A

Initial RIT

42
Q

A sustained outage is when power has been out for more than ____ minutes?

A

2 minutes

43
Q

Gas transmission lines have pressure ranges up to ____ psi?

A

450

44
Q

What is the proper sequence for shutting off gas utilities?

A

Appliance, meter, curb box

45
Q

The most hazardous condition involving downed power lines is?

A

They do not come in contact with the ground

46
Q

Transmission systems carry power generally between how many volts?

A

60,000 and 500,000

47
Q

What is the expansion rate of liquified natural gas?

A

600:1

48
Q

The initial alarm assignment for an outside gas leak not meeting the hazardous material response criteria should include:

A

1-engine, 1- truck or rescue

49
Q

What are the two basic types of residential meters?

A

Inside and outside

50
Q

Most piping located underground in a curb box is usually at a depth of

A

2-3ft

51
Q

For outside gas leaks, the general rule for apparatus positioning is no closer than ____ft for the first-arriving unit and a minimum distance of ____ft for all other incoming units.

A

100; 300

52
Q

Gas shut off valves are:

A

Quarter-turn

53
Q

What action should you take if, while fighting a propane fire, you hear a rising sound from venting safety devices or see discoloration of the tank?

A

Leave the area immediately

54
Q

Which of the following gas shut-off valves shall not be operated by the fire department?

A

Street

55
Q

For an outside gas fire, what, at a minimum, shall be deployed?

A

An 1¾” line along with a dry chemical extinguisher

56
Q

What is the best procedure or tactic if a gas line is on fire?

A

Protect exposures

57
Q

When shall an EMS unit be added to an inside gas leak?

A

If any occupants report feeling ill

58
Q

What should be the primary tactic used to remove gasses from a structure?

A

Natural ventilation

59
Q

For instances where the leak cannot be controlled (i.e., high pressure gas lines, gas leaks underwater when a trench fills with water and gas is leaking, and/or leaking from a manhole cover, crack in street, drain), the officer should confirm the respective utility company is enroute, establish hot/cold zones for operations, and:

A

Isolate the area

60
Q

When should an initial RIT be identified and consideration given to increasing resources for a structure fire response?

A

When an IDLH atmosphere is identified

61
Q

What is the approved APWA color code for marking potable water?

A

Blue

62
Q

What is a characteristic that makes natural gas in transmission pipelines and rail cars a particularly significant danger to first responders?

A

The gas is odorless in those vessels

63
Q

What is the last option for turning off the gas to a residential building for Fire and Rescue personnel?

A

At the curb box in front of the residence

64
Q

Propane has a vapor density of 1.56, which gives it what type of behavior?

A

It is heavier than air and will seek low areas and accumulate

65
Q

What is the most common type of propane incident?

A

Incidents involving 20 lb. cylinders

66
Q

According to the APWA, what color paint or other marking material would be used to mark the following; electric, cable, conduit and lighting cable?

A

Red

67
Q

You arrive on the scene of an outside gas leak and find green lines painted on the ground in the area of the leak. What does this marking represent?

A

Sewer and drain lines

68
Q

Which of the following is defined by; ‘Designed to be incapable of producing heat or spark sufficient to ignite an explosive atmosphere’?

A

Intrinsically safe

2023 Lieutenant Test (33 decks)

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