What visual signs might indicate a failing line in a sound-powered system?

• A. Frayed cable, corroded connectors, or moisture on connectors.
• B. Fresh paint on the device.
• C. A perfectly intact cable with no moisture.
• D. A high-pitched tone only audible to the operator.

Answer: (A)

Visible damage to cables and connectors is a primary indicator of a failing line in a sound-powered system. Frayed cable insulation exposes conductors and can cause intermittent contact or open circuits; corroded connectors increase contact resistance or loosen the connection; moisture on connectors creates leakage paths and accelerates corrosion. All of these visually observable issues directly compromise the line’s reliability.

The other options don’t show visual signs of a failing line. Fresh paint doesn’t reveal an electrical problem; a perfectly intact cable with no moisture obviously wouldn’t indicate failure; and a high-pitched tone is an acoustic symptom, not a visual cue.