The inboard wheel half is the half of a ______ wheel that houses the brake.

• A. Single-piece
• B. Three-piece
• C. Two-piece
• D. Four-piece

Answer: (C)

The main idea tested is how wheel construction determines where the brake sits. In a two-piece wheel, the wheel is split into an inner (inboard) half and an outer (outboard) half that bolt together around the brake assembly. The braking components are mounted on the inner half, so that the inboard wheel half actually houses the brake. This layout lets maintenance access the brake by removing the halves as needed. In contrast, a single-piece wheel doesn’t have a separate inner half to hold the brake, and three-piece or four-piece designs use different center sections that aren’t described as the inboard half housing the brake.