
Transformers Week 3
Quiz
•
Professional Development
•
Professional Development
•
Medium
Mike Munoz
Used 75+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
the power leg is always located _______________ away from the neutral connection.
closest
3 coils
1-1/2 coils
next to
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
either a ____________ or a physical check by taking the lid off the transformer is needed to check which configuration the secondary coils are in
megger
voltage
turns-ratio
continuity
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
when banking transformers, using transformers of differing polarity will not work
True
False
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
what needs to be done if you have transformers with mismatched impedances between paralleled units or banks
cannot use
de- rate because voltage will change
doesn't matter
de-rate because load will not divide in proportion to the KVA
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
a single three phase transformer is the most common choice among utilities for providing three phase power
true
false
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
open banks are about _________ % as efficient as a three pot bank
52.7
47.3
57.5
57.7
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
proper transformer selection starts with what?
looking at KVA rating
comparing the circuit and service voltages with the transformers voltage rating
reviewing the transformer nameplate
comparing when on the pole
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