Intro to Millwright Practice Exam

What type of hex-head wrench allows for tilting while maintaining contact with the bolt and screw?

1. Ball Driver

2. Socket Wrench

3. Box Wrench

4. Open-End Wrench

The correct answer is: Ball Driver

The ball driver hex-head wrench features a rounded end that allows for a certain degree of angle adjustment when engaging with a bolt or screw. This design facilitates tilting and positioning at various angles, which is particularly useful in tight or awkward spaces where the bolt may not be readily accessible at a straight angle. The ability to maintain contact while allowing this tilt makes it an ideal tool for working with hexagonal fasteners when traditional straight wrenches may not provide the necessary access. In comparison, the other types of wrenches listed do not offer the same flexibility. A socket wrench typically requires a direct line to the fastener, while a box wrench has a closed-off end that limits movement. An open-end wrench has two flat sides and does not allow for tilt, making it less effective in the described scenario. Hence, the ball driver is uniquely advantageous for situations that demand both reach and angle versatility.