Utilities Flashcards
Designed to be incapable of producing heat or a spark sufficient enough to ignite an explosive atmosphere.
Intrinsically safe
According to the American Public works Association the color code designated for Electrical, cable, Conduit, and lighting cables are colored?
Red
According to the American Public works Association the color code designated for gas, oil, steam, petroleum, or gaseous materials are colored?
Yellow
In Virginia Miss Utiliity may be accessed by dialing
811
What is the vapor density of methan?
0.55
What is the flammable range for natural Gas
5%-15%
What is the initial alarm for an outside gas leak?
1 Engine 1 Truck or Rescue
What size of a gas line leak requires a Hazmat Response?
2”
Responding units should protect utility workers with what equiptment?
Hoseline and 20lb Dry chem
Fire Department personnel will ensure that no persons shall enter a trench that is deeper than ____ that is not shored.
5’
The DOT ERG recommends evacuation distances of ____ with an outside gas leak.
330ft
In extreme cases fire department can crimp line of what diameter?
3/4”
What state is propane in when it is stored anad contained?
Liquid State
Propane has a vapor density of?
1.56
What is the expansion ratio of propane
270-1
Residential levels of CO should not exceed ___ in an 8hr average.
9ppm
At what level of CO should the structure be evacuated and crews don their SCBA?
35ppm
Real world examples of a good insulator would be?
Rubber Gloves, Tires, Wood poles
What does the second Line of numbers mean on telephone poles
Specific pole Number
What does the top number set of numbers mean on telephone poles?
Grid Number
What is the initial alarm assignment for an inside gas leak?
2 engines, 1 truck or rescue , 1 BC
What must be added to an inside gas leak if someone feels ill?
EMS unit
What is the initial alarm assignment for a CO alarm?
1 engine, 1 ems unit
What does APWA stand for?
American Public Works Association
What is APWA yellow color codes mark for underground utilities stand for?
gas, oil, petroleum or gaseous materials
What is used to give natural gas an odor?
mercaptan
Where is natural gas not odorized?
Rail cars, transmission lines
What is natural gas ignition temperature?
1200F
What does BLEVE stand for?
Boiling Liquid Expanding Vapor Explosion
What are the most hazardous conditions involving power lines?
When they do not come into contact with the ground
What does NIOSH consider as the acceptable ppm for CO in a commercial building?
35ppm
Where should you not walk towards or stand next to on a tank?
Path of the relief valve
On a propane fire, what should you do if you hear hissing or see discoloration?
leave the area immediately
What is the proper sequence to shutting off the utility in a leak or fire situation?
at the appliance, at the meter, at the curb box
What can transmission lines produce up to in static electricity?
2000-24000 volts
What is the flammable range of natural gas?
5-15%
Where should first arriving unit position on an outside gas leak?
100ft
Where should all other arriving units position on an outside gas leak after first unit has arrived?
300ft
What does the DOT emergency response guide (ERG) suggests an evacuation distance of?
330ft
A device, which provides transition between underground cable to overhead lines or conductors.
Pothead
The ratio of the weight of a given volume of gas to the weight of an equal volume of air the same temperature. and pressure
Vapor Density
What does TWA stand for?
Time, Weighted, Average
What is the APWA color code for sewer and drain lines?
Green
The Flammable range for natural gas is between ____% and _______%
5% and 15%
The ignition temperature for natural gas is?
1200 degrees
Engine company positioning at an outside gas emergency:
1st arriving unit - prior to and upwind of the hazard. No closer than 100 feet
The minimum initial alarm assignment for outside gas leaks:
1 E, 1 T or R
Additionally, Fire department personnel shall ensure no persons enters a trench deeper than ______ feet that is not shored. (29 CFR 1926.651)
5 feet
The minimum initial alarm assignment for inside gas leaks:
2 E, 1 T or R, 1 BC
The presence of a gas vent on an exterior wall is an indication of what?
An inside gas meter
Propane has an expansion ratio of _________?
270 to 1
Propane has an ignition temperature between ______ degrees and ______ degrees.
920 and 1,120 degrees
The LEL for carbon monoxide is ___% and UEL ___%.
12.8% and 74%
The recommended initial alarm assignment for carbon monoxide emergencies is?
1 E, 1 Medical unit
What are the two basic properties of electricity?
Voltage and current
Line voltage and absolute limit of approach: A) Up to 50,000 volt. B) 50,000 - 115,000 volts C) 115,000 - 230,000 volts D) 230,000 - 500,000 volts
A) 10ft B) 12 ft C) 16 ft D) 25ft
At incidents where an individual is in a vehicle that has downed wires, stay ___ ft away from the vehicle until the power can be locked out.
30ft
E418 has just spent the last 2 hours on a broken sprinkler system flooding the Marriott, unfortunately the sprinkler system needed to be shut down completely until repairs can be made. What steps need to be taken before E418 leaves the scene?
Notify the fire inspection division/ department or fire marshal’s office and the occupancy may need to institute a fire watch until the system is restored
When navigating in poor visibility how should firefighters position their arms and palms?
Arms up and palms in
BLEVE
boiling liquid expanding vapor explosion
AWPA (American public works association) color code undergroud utilities. Communications, alarm, signal lines, cable or conduit.
Orange
Methane vapor denisity
0.55
Natural gas flammable range?
5%-15%
Natural gas ignition temp?
1200 degrres F
Expansion ratio of liquefied natural gas?
600:01:00
NG transmission lines range in size from 6-30 in and pressures up to ___?
450 psi
Propper sequence for shutting off NG utility?
Appliance, meter, curb box
If the break in a gas line is reported to be over ___ inches in diameter, incident should be upgraded to a hazmat response.
2
FD personnel shall ensure no persons enter a trench deeper than ___ feet that is not shored.
5
The ERG suggests an evacuation distance of ___ for NG.
330 ft
At a minimun a _______ shall be deployed for an outside fire.
1 3/4 handline and dry chem
Most commercial and all residential appliances use gas at a pressure of _____?
1/2 to 1/4 psi
Propane expansion ratio?
270:01:00
Vapor density of propane?
1.56
Propane flammable range?
2.3-9.5%
Propane ignition temp?
920-1120 F
Most common propane incidents will involve __lb cylinder.
20
As little as ____ milliamps can be fatal.
50
What term relates to an explosion due to vapor expansion?
BLEVE
An item that is designed to be incapable of producing heat or spark sufficient to ignite an explosive atmosphere is known as what?
intrinsically safe
What is the flow of an electric current across a gap between two conductors, terminals, or contacts?
arc
What is the ratio of the weight of a given volume of gas or vapor to the weight of an equal volume of air at the same temperature and pressure?
vapor density
What is the unit of measure of electric potential, which causes electric energy to flow?
volt
What utility marking color would indicate sewer and drain lines?
green
What utility marking color would indicate electric?
red
When responding to an outside natural gas emergency, how far should the first arriving unit position from the incident?
100 ft.
When encountering a gas emergency, which of the following should not be operated by FRD personnel?
street valve
Due to the vapor density of natural gas, what is the expected movement?
rise
Which method of ventilation should be used when attempting to mitigate an inside gas leak?
natural
In the event the residential gas meter is not accessible, where should the gas be shut off?
curb box
Given the vapor denisity of propane, in which areas would you expect to find it during a leak?
low areas
When fighting a propane tank fire that is venting, what is the best tactic?
cool the tank
When encountering carbon monoxide in a structure, at what ppm shall firefighters retreat from the structure and don SCBA?
35
In the event you are near a downed power line that becomes energized, how should you move away from it?
shuffle
At an incident where a vehicle is in contact with a downed wire, what distance should be maintained until power is controlled?
30 ft
What is the name of the void that is located between regular-use floors, commonly located in hospitals and laboratory type buildings to allow space for mechanical systems of the building?
interstitial space
Victims sustaining an electrical burn should be transported to what facility?
burn center
What is significant about a natural gas leak in a transmission line?
no odor
What is a device which provides transition between underground cable to overhead lines or conductors?
Pothead
Most residential and business customers receive electricity from what type of distribution line?
Secondary
What APWA color is used to signify electric, cable, conduit, lighting cable?
Red
What APWA color is used to signify gas, oil, steam, petroleum or gaseous materials?
Yellow
What APWA color is used to signify communications, alarm or signal lines, cable or conduit?
Orange
What APWA color is used to signify potable water?
Blue
What APWA color is used to signify reclaimed water, irrigation and slurry lines?
Purple
What APWA color is used to signify sewer and drain lines?
Green
What APWA color is used to signify temporary survey markings?
Pink
What APWA color is used to signify proposed excavation?
White
The number for contacting Miss Utility is 1-800-552-7001. In Virginia Miss Utility can also be accessed by dialing what number?
811
What is a pungent odorant that is added to natural gas as a safety precaution after it is received at the distribution site?
Mercaptan
What is the flammable range of natural gas?
5%-15%
The general rule of thumb for positioning apparatus at an outside gas leak is no closer than what?
100 feet
If an outside gas leak is in a line that is reported to be over how many inches in diameter, the incident should be upgraded to a hazardous materials response?
2
Propane has an expansion ratio of what?
270/1
If the line voltage is 50,000 to 115,000 than the absolute limit of approach should be what?
12 feet
If the line voltage is 230,000 to 500,000 than the absolute limit of approach should be what?
25 feet
Which of the following colors is the American Public Works Association’s (APWA) color code for communications, alarm, signal lines, cable or conduit lines?
Orange
What is the flammable range for natural gas?
5 to 15 percent
What is the general rule for positioning distance for the first arriving unit on a gas leak?
100 feet
At what diameter line should a gas leak be upgraded to a hazardous materials?
Over 2”
In the event that the shut-off on an inside residential installation cannot be operated due to fire or accessibility, where should the gas be turned off?
At the curb box.
How many hoses and what size/pattern are recommended for vapor disperstion?
Two 1¾” hoselines with the nozzles on a narrow fog pattern.
What does the most common propane incident involve?
20 lb cylinder.
When the propane tank is venting and the product is burning what is the best course of action?
cool the tank at the vapor space.
How much water is required to effectively cool a 20 to 100 lb propane tank?
50 GPM
When approaching a propane tank what area should you not walk or stand in? Select the best answer.
The path of the relief valve.
What is the best place to turn off the gas when propane Is leaking inside a structure?
At the tank from the outside of the structure.
At what PPM carbon monoxide should crews retreat from the structure and don their SCBA face
35 PPM
Up to what level carbon moxoxide is considered “not uncommon” inside a structure?
10 PPM
What two basic properties make up electricity?
Voltage and current.
At incidents where an individual is in a vehicle that has downed wires, stay ___ away from the vehicle until the power can be locked out.
30 feet
What is the top line on a power pole number for?
The map grid for which the pole is located
When advised by the power company that power is down, what should you ask?
Ask them how they determined this.
What is the ignition temperature for natural gas?
About 1200 F
How heavy is propane in relation to air?
1 1/2 times heavier
When shall an initial RIT be identified on an inside gas leak?
When an IDLH atmosphere is identified
A ___ is defined as the flow of an electric current across a gap between two conductors
arc
Primary is electrical service between 2000 and ___ volts
50000
___ is an average rate of exposure over the course of an eight-hour work shift
TWA
What is the APWA color code for gas lines?
yellow
In addition to 1-800-552-7001 how else can Miss Utility be dialed?
811
Methane has a flammable range of?
5-15%
What is the ignition temp for natural gas?
1200
Where are residential gas lines historically found?
at the entry point to the kitchen
how close should the first arriving unit position on a report of a gas leak?
100ft
when greater than ___ in diameter a break in a gas line shall be upgraded to a hazmat?
2”
What is the deepest trench FRD personnel may enter without shoring?
5’
Which valve shjould never be operated by FRD personnel?
street valve
DOT ERG suggests a minimal evacuation zone of how far for a gas leak?
330’
FRD personnel should clamp or crimp a leaking line in extreme cases AND when the line is ____ or smaller.
3/4”
What feature of the exterior indicates an interior gas meter?
gas vent
Propane has an expansion ratio of
270-1
A person with a normal sense of smell should be able to to detect the odorant add to propane at what % of the LEL?
20
The most common propane incident will involve a ___lb cylinder
20
What is the OSHA same working level of CO in PPM?
35
When are downed power lines the most dangerous?
when not in contact with the ground
