A power line conditioner can compensate for which two events?

Question

Options

• ADC offset
• BInterruptions
• CCurrent increases
• DVoltage fluctuations

• A
  75% (27)
• B
  6% (2)
• C
  6% (2)
• D
  14% (5)

Explanation

Note: The question asks for two events, so the full correct answer is A (DC offset) and D (voltage fluctuations) - "Correct Answer: A" appears to be a partial listing.

A power line conditioner is designed to clean and stabilize incoming AC power, which means it can filter out DC offset (unwanted direct current riding on an AC line) and smooth out voltage fluctuations such as sags, swells, and noise. Interruptions (B) are complete losses of power that a conditioner cannot fix - that requires a UPS with battery backup. Current increases (C) are not a standard category of power event that conditioners are rated to handle; conditioners regulate voltage, not current draw from the load side. Voltage fluctuations (D) are correct, not a distractor, as regulation of over- and under-voltage conditions is a core function of any line conditioner.

Memory tip: Think of a power line conditioner as a "voltage filter" - it filters the shape and level of the signal (DC offset, voltage swings) but cannot restore power that has gone completely out.

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