General Flashcards
How often do you need to test rubber gloves?
Before each use
How often do rubber gloves need to be electrically tested?
Every 6 months
What do you need when your excavation is 4 feet in depth or more?
Exit every 25 feet
On a commercial vehicle, what are the following air lines for?
- Red
- Blue
Red- Emergency
Blue- Service
Why would you need to attach Aluminum over Copper?
Prevent oxidation
What is the minimum approach distance on a system voltage of 12,470 for..
- Phase to ground
- Phase to Phase
2’ 1” phase to ground
2’5” phase to phase
How often are live tools electrically tested?
Every 2 years
What size hole would you need to drill for a 5/8” bolt?
11/16
Class 2 rubber gloves are good for up to what system voltage?
17,000v
Class 2 rubber gloves are tested at what voltage?
20,000 Vac (volts alternating current)
Low power factor due to lagging current can be corrected by adding what?
Capacitor
In an A.C sine wave, at what degrees are the following?
- Zero Value
- Max Positive
- Max Negative
Zero value- 0°, 180°, 360°
Max positive- 90°
Max negative- 270°
What color are class 2 gloves and what is the max use voltage?
Yellow and 17,000V
What color are class 1 rubber gloves and the max use voltage?
White and 7,500V
What color are class 3 rubber gloves and the max use voltage?
Green and 26,500V
