Weekly Basics Quiz Flashcards
In dc, red is always to the ..?
Positive side
T or L; which is line and load?
T is load. L is line.
What communications system is used for short distances to cameras?
Ethernet. Not fibre.
Why can’t you measure certain dc circuits using ground as a reference?
Because they may not be grounded themselves.
How can using an ohmeter across an open complete circuit?
Parallel path provided via ohmeter.
Is mehger ever used for continuity BETWEEN phases?
No. Only an ohmeter for that.
Should there be 0 ohms resistance between phases?
No; windings have resistance.
When racking out, what happens if you don’t press an e stop or verify conveyor isn’t running?
Arc flash when racking out.
What does the blue light mean on an SR?
That is in auto/operaton friendly mode.
Batteries in a ups bank are always installed in…
Series (parallel make them loads for each other, causing fire).
