Utility Manual Flashcards
What does the electrical distribution system include?
Primary and secondary lines
What does the abbreviation K stand for?
1000
Momentary Outage?
Electrical outage lasting two minutes or less
Pothead?
A device which provides transition between underground cable to overhead lines or conductors
Recloser?
An automatic protection device that senses and interrupts distribution system faults
Riser?
The conductor part of transition leading from underground to overhead
Sectionalize?
The process of opening switches or fuses to divide a circuit into sections to isolate the cause of the power outage. This reduces the impact of the power outage to the fewest possible customers by allowing power to move through undamaged parts of the system
What electrical service is taken at less than 2000 volts?
secondary
Stopcock Valve
a quarter-turn valve used to restrict or isolate the flow of liquid or gas in a pipe
Sustained Outage?
An electrical outage lasting longer than 2 minutes
Time Weighted Average (TWA)?
THe average exposure to a contaminant or condition (such as noise) to which workers may by exposed without adverse effect over a period such as in an 8hr day or 40hr week
What does a vapor density of less than 1 indicate, more than 1?
Less than 1 indicates it is lighter than air while greater than 1 is heavier
What color codes are approved by Virginia State Corporation Commision for underground utilities?
American Public Works Association’s (APWA)
What shall all marks and markers indicate?
Name, initials, or logo of the company that owns or operates the line and the width of the facility if it is greater than 50mm (2in)
Red markings indicate?
electrical, cable, conduit and lighting cable
Yellow markings indicate?
gas, oil, steam, petroleum or gaseous materials
Orange markings indicate?
communications, alarm, or signal lines, cable or conduit
Blue markings indicate?
potable water
Purple markings indicate?
Reclaimed water, irrigation and slurry lines
Green markings indicate?
sewer and drain lines
Pink markings indicate?
Temporary survey markings
White markings indicate?
Proposed excavation
CI stands for?
Cast iron
CPR stands for?
copper