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
