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CISSP-ISSAP · Question #212

Which of the following is an electrical event shows that there is enough power on the grid to prevent from a total power loss but there is no enough power to meet the current electrical demand?

The correct answer is D. Brownout. Brownout is correct because it describes a condition where the electrical grid remains partially operational - there is some power, but insufficient to meet current demand, causing voltage to drop below normal levels rather than cutting out entirely. This reduced voltage can…

Infrastructure Security

Question

Which of the following is an electrical event shows that there is enough power on the grid to prevent from a total power loss but there is no enough power to meet the current electrical demand?

Options

  • APower Surge
  • BPower Spike
  • CBlackout
  • DBrownout

How the community answered

(45 responses)
  • A
    4% (2)
  • B
    2% (1)
  • C
    2% (1)
  • D
    91% (41)

Explanation

Brownout is correct because it describes a condition where the electrical grid remains partially operational - there is some power, but insufficient to meet current demand, causing voltage to drop below normal levels rather than cutting out entirely. This reduced voltage can cause lights to dim and electronics to malfunction without a full outage.

Why the distractors are wrong:

  • A (Power Surge): A surge is a rise in voltage above normal levels - the opposite of a brownout.
  • B (Power Spike): A spike is an extremely brief, intense burst of excess voltage - again, too much power, not too little.
  • C (Blackout): A blackout is a complete loss of power, which is exactly what the question says does not happen here.

Memory tip: Think of the word "brown" - a brownout is like a light that goes dim (brownish) instead of going out completely. If it's fully off, that's a blackout; if it's partially dim, that's a brownout.

Topics

#Electrical Power Events#Brownout#Power Management#Infrastructure Availability

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