What term describes machines utilizing friction for movement?

• A. Footrest Obstruction Device
• B. Friction Machines
• C. Routine Inspections
• D. Maximum Speed

Answer: (B)

When movement is produced by the contact force between two surfaces rather than by gears, chains, or belts, the mechanism is a friction drive. So a term describing machines that utilize friction for movement is friction machines. This emphasizes the way motion is transmitted: through friction at the interface between contact surfaces, not through interlocking teeth or driven belts.

The other options don’t describe how movement is achieved. A footrest obstruction device is about safety features that can block or limit movement of the footrest, not how the machine moves. Routine inspections refer to the maintenance checks performed on equipment. Maximum speed describes a performance specification, not the method of movement.