The transfer of unwanted signals may occur over one path or several paths. What method addresses the mitigation or suppression of unwanted signals?

Question

Options

• AMounting heights in racks and cabinets
• BBonding and grounding
• CSignal coupling
• DThe use of unshielded cables

• A
  15% (6)
• B
  74% (29)
• C
  5% (2)
• D
  5% (2)

Explanation

Bonding and grounding is the correct answer because it provides a controlled, low-impedance path that neutralizes unwanted electrical signals (noise, interference, and static charges) before they can propagate through a system, effectively suppressing electromagnetic interference (EMI) at its source or along its transfer paths. Mounting heights in racks and cabinets (A) is a physical organization practice that improves airflow and cable management but does nothing to suppress signal interference. Signal coupling (C) is actually the mechanism by which unwanted signals transfer between conductors -- it describes the problem, not the solution. Unshielded cables (D) make interference worse by offering no barrier against electromagnetic noise, which is the opposite of mitigation.

Memory tip: Think of bonding and grounding as giving stray electrical signals a safe "drain" -- just as grounding a lightning rod safely directs a strike into the earth, bonding and grounding redirects unwanted signals away from sensitive circuits.

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