Question 168Electricity & Electronics - Assistant Engineer

The correct answer is D) Sanding with 0000 sandpaper. To dress the face of silver-plated contacts, sanding with 0000 sandpaper is the recommended method. This gentle abrasive action helps to remove any oxidation or tarnish on the contact surface, restoring a clean, conductive finish without damaging the underlying silver plating. The fine grit of 0000 sandpaper ensures a smooth, polished appearance without removing too much material. The other options, such as knurling, filing, or burnishing, are not suitable for delicate silver-plated contacts as they could potentially scratch or deform the surface, compromising the integrity of the electrical connection.