Which statement about the two chip detector types is true?

• A. The first uses the accumulation of metal particles to complete a circuit and send a cockpit warning.
• B. The second also sends a cockpit warning when metal particles accumulate.
• C. The second collects metal particles but sends no signal; instead it is removed and inspected routinely.
• D. Both chip detector types perform identical signaling.

Answer: (C)

Two chip detector designs exist in aircraft lubrication systems. One design is wired to the cockpit warning system: as metal particles accumulate, they bridge contacts and complete a circuit, triggering a cockpit warning. The other design is a passive indicator that traps metal but does not send an electrical signal; it is removed during routine maintenance and inspected for wear and particle content.

That’s why the statement describing the second type as collecting metal particles without signaling and being inspected routinely is true. The other options imply signaling from the second type or identical signaling from both, which isn’t accurate.