Which machine is described as a machine with a flat circular disc faced with abrasive paper for smoothing wood surfaces?

• A. Disc sander
• B. Band facer
• C. Pencil
• D. Mallet

Answer: (A)

The main idea here is identifying a tool that smooths wood by using abrasive paper attached to a flat circular disc that spins. A disc sander matches this description precisely: it features a flat disk that rotates, with abrasive paper glued to the face, allowing rapid smoothing of flat surfaces and edges. This makes the surface finish quicker and more uniform than hand sanding.

The other items don’t fit the description. A pencil is used for marking lines, not smoothing surfaces. A mallet is a hammer-like tool used for tapping or driving components. The remaining option describes a tool that doesn’t use a flat circular sanding disc, so it wouldn’t perform the described smoothing function.