Question

Which situation is NOT listed by the source as a cause of more significant interference on the bus?

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Answer

C — Using a certified twisted-pair bus cable of the correct colour.

Correct: cable certification/colour is not listed as a cause of interference.

All proposed choices (exam context)
  1. A.Installing bus devices in loops.
  2. B.Running bus and high-power mains in parallel over a long distance.
  3. C.Using a certified twisted-pair bus cable of the correct colour.✓
  4. D.Bus devices connected to metal walls or central-heating pipes.
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