9 GE

Question 1

The links in the power system chain are: generator, power transformers, switchgear, transmission lines, distribution circuits, and the utilization apparatus. (T or F)

Answer 1

True

Question 2

What is the most vulnerable part of the chain?

Answer 2

Transmission lines

Question 3

Relays reduce the number of alternate links to avoid equipment damage or limit damage to a single unit. (T or F)

Answer 3

True

Question 4

The difference between primary and back-up relaying is that primary is the secondary defense and isolates a greater portion of the chain. Back up relaying is the first line of defense and isolates a minimum portion of the circuit. (T or F)

Answer 4

False!

Question 5

A device which when energized by suitable currents, voltages, or both, responds to the magnitudes and relationships of those currents and voltages to indicate or isolate an abnormal condition would best be described as a protective relay. (T or F)

Answer 5

True

Question 6

What are the four basic types of electromagnetic relay operating elements?

Answer 6

All of the above

Plunger
Hinged armature
Induction disk
Induction cup

Question 7

What element is used as a time delay?

Answer 7

Disk

Question 8

What is the advantage of the induction cup?

Answer 8

Instantaneous operation with the ability to monitor several electrical qualities.

Question 9

Operating characteristic curves is a graph depicting the relationship of quantities that will cause the relay to operate (T or F)

Answer 9

True