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What can be defined as a momentary low voltage?

What can be defined as a momentary low voltage?

PrepAway - Latest Free Exam Questions & Answers

A.
spike

B.
blackout

C.
sag

D.
fault

Explanation:
Interference interrupts the flow of an electrical current, and fluctuations can actually deliver a different level of
voltage than what was expected. Each fluctuation can be damaging to devices and people.
The following explains the different types of voltage fluctuations possible with electric power:
Power excess:
Spike Momentary high voltage
Surge Prolonged high voltage
Power loss:
Fault Momentary power outage
Blackout Prolonged, complete loss of electric power
Power degradation:
Sag/dip Momentary low-voltage condition, from one cycle to a few seconds
Brownout Prolonged power supply that is below normal voltage
In-rush current Initial surge of current required to start a load
Incorrect Answers:
A: A spike is a momentary high voltage, not a momentary low voltage. Therefore, this answer is incorrect.
B: A blackout is a prolonged complete loss of power, not a momentary low voltage. Therefore, this answer is
incorrect.
D: A fault is a momentary power outage, not a momentary low voltage. Therefore, this answer is incorrect.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 462-463


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