Which of the following are two types of portable sanders?

• A. Belt and Disc
• B. Random Orbit and Finishing
• C. Palm and Finishing
• D. Orbital and Oscillating

Answer: (D)

The main idea is that portable sanders are categorized by how the sanding pad moves while you hold them. Two types you’ll hear about as handheld tools are orbital and oscillating sanders. An orbital sander moves the pad in a small circular pattern, which removes material quickly while keeping scratches shallow and easy to blend. An oscillating sander moves the pad in a back-and-forth, small-arc motion, which is very gentle on the surface and helps produce a smooth, even finish with minimal gouging. The other options mix tools or motions that aren’t both typically considered portable hand-held sanders, so they don’t define the common handheld categories as clearly.