Utility Emergencies Flashcards
A device which provides transition between underground cable to overhead lines or conductors
Pothead
Electric service taken at less than 2000 volts. Most residential and business customers receive electricity from secondary distribution lines
Secondary
The average exposure to a contaminant or condition (such as noise) to which workers may be exposed without adverse effect over a period such as in an 8-hour day or 40-hour week
Time Weighted Average
Utility Markings Red
electric
cable
conduit
lightning cable
Utility Markings Yellow
gas
oil
steam
petroleum
gaseous materials
Utility Markings Orange
Communications
Alarm
Signal lines
Cable
Conduit
Blue
Potable water
Purple
Reclaimed water
Irrigation
Slurry lines
Green
Sewer & drain lines
Pink
Temporary survey markings
White
Proposed excavations
The flammable range for natural gas is..?
Between 5% & 15%
The expansion rate of liquified natural gas is..?
600:1
The general rule for apparatus positioning is….?
No closer than 100’ for the first arriving unit & a minimum of 300” for all other incoming units
If the break on the gas line is reported to be over ___ ____in diameter, the incident should be ______ ______ _____
2 inches, upgraded to a hazmat response
