General Knowledge Flashcards
What must be done before working on capacitors?
Isolate, test, ground, shunt, wait 5 minutes.
In a A.C. sine wave, at what degrees are the following?
Zero Value…
Max Positive…
Max Negative…
Zero Value…. 0 degrees, 180 degrees, 360 degrees.
Max Positive… 90 degrees
Max Negative… 270 degrees
What are the 4 things that affect resistance?
Heat, size, material, and length
Low power factor due to lagging current can be corrected by adding what?
Capacitor bank
How often do you need to test rubber gloves?
Before each use
Class 2 rubber gloves are good for up to what system voltage?
17,000 volts
Class 2 rubber gloves are tested at what voltage?
20,000 volts
How often do rubber gloves need to be electrically tested?
6 months
When does OSHA’s regulation on fall protection say you need it?
When you are above 4 feet
What do you need when your excavation is 4 feet in depth or more?
Means of exit, such as a ladder. Steps no more than 25’ of lateral travel.
How far away from the excavation do the spoils need to be?
2’
What happens to the excavation if the spoils are not the required distance away?
Add to total depth of hole
At what depth is shoring required?
5’ or more
What is the minimum size for personal protective grounds?
2 or to carry out max fault current
According to OSHA, what things need to be included in a job briefing?
Location of job, location of hospital, scope of the work, PPE, energized source, special procedure, hazards.
