Utilities Manual

Question 1

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

Answer 1

9.5

Question 2

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

Answer 2

Cool the tank at the vapor space

Question 3

The explosive range of Carbon Monoxide is ____ and _____.

Answer 3

12.8% (LEL); 74% (UEL)

Question 4

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

Answer 4

35

Question 5

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

Answer 5

10 feet

Question 6

What is the safest insulator for electricity?

Answer 6

Distance

Question 7

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

Answer 7

30’

Question 8

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

Answer 8

Map Grid

Question 9

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

Answer 9

Specific pole number

Question 10

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.

Answer 10

Cross Arm

Question 11

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

Answer 11

Electric, cable, conduit and lighting cable

Question 12

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

Answer 12

Reclaimed water, irrigation and slurry lines

Question 13

What is the flammable range for natural gas?

Answer 13

5% - 15%

Question 14

What does the acronym BLEVE stand for?

Answer 14

Boiling Liquid Expanding Vapor Explosion

Question 15

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.

Answer 15

2”

Question 16

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

Answer 16

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

Question 17

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

Answer 17

20lb dry chemical extinguisher and a charged hoseline

Question 18

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

Answer 18

330 feet

Question 19

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

Answer 19

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

Question 20

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

Answer 20

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

Question 21

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

Answer 21

1.75” along with an additional backup 1.75” line

Question 22

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

Answer 22

35

Question 23

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

Answer 23

35

Question 24

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

Answer 24

30 feet

Question 25

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

Answer 25

Natural

Question 26

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

Answer 26

5 feet

Question 27

What is the initial alarm for an inside gas leak?

Answer 27

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

Question 28

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

Answer 28

Pothead

Question 29

APWA color codes underground utilities. What does yellow specify?

Answer 29

Gas, oil, steam, petroleum, or gaseous materials

Question 30

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

Answer 30

(2) 1¾ hand lines on a narrow fog

Question 31

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

Answer 31

5 feet

Question 32

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

Answer 32

Rise in air

Question 33

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

Answer 33

Fire inspection division/department or fire marshal’s office

Question 34

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

Answer 34

Temporary survey markings

Question 35

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

Answer 35

5 - 15%

Question 36

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

Answer 36

35

Question 37

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

Answer 37

25’

Question 38

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.

Answer 38

1 ½

Question 39

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.

Answer 39

Interstitial

Question 40

Mercaptan is added to natural gas at the;

Answer 40

Distribution site (Gate Station)

Question 41

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

Answer 41

Initial RIT

Question 42

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

Answer 42

2 minutes

Question 43

Gas transmission lines have pressure ranges up to ____ psi?

Answer 43

450

Question 44

What is the proper sequence for shutting off gas utilities?

Answer 44

Appliance, meter, curb box

Question 45

The most hazardous condition involving downed power lines is?

Answer 45

They do not come in contact with the ground

Question 46

Transmission systems carry power generally between how many volts?

Answer 46

60,000 and 500,000

Question 47

What is the expansion rate of liquified natural gas?

Answer 47

600:1

Question 48

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

Answer 48

1-engine, 1- truck or rescue

Question 49

What are the two basic types of residential meters?

Answer 49

Inside and outside

Question 50

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

Answer 50

2-3ft

Question 51

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.

Answer 51

100; 300

Question 52

Gas shut off valves are:

Answer 52

Quarter-turn

Question 53

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?

Answer 53

Leave the area immediately

Question 54

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

Answer 54

Street

Question 55

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

Answer 55

An 1¾” line along with a dry chemical extinguisher

Question 56

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

Answer 56

Protect exposures

Question 57

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

Answer 57

If any occupants report feeling ill

Question 58

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

Answer 58

Natural ventilation

Question 59

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:

Answer 59

Isolate the area

Question 60

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

Answer 60

When an IDLH atmosphere is identified

Question 61

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

Answer 61

Blue

Question 62

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

Answer 62

The gas is odorless in those vessels

Question 63

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

Answer 63

At the curb box in front of the residence

Question 64

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

Answer 64

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

Question 65

What is the most common type of propane incident?

Answer 65

Incidents involving 20 lb. cylinders

Question 66

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

Answer 66

Red

Question 67

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?

Answer 67

Sewer and drain lines

Question 68

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

Answer 68

Intrinsically safe