WISE Technician Certification Practice Exam

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Which type of screws should not be reused if bent?

Wood screws

Machine screws

Machine screws are specifically designed for fastening components using a pre-tapped hole or a nut, providing a strong and secure connection. If a machine screw is bent, its structural integrity is compromised. Attempting to reuse a bent machine screw could lead to failure in the assembly, as the screw may not maintain the necessary clamping force. Furthermore, a bent machine screw may not fit properly in the intended application, leading to alignment issues and potential damage to associated components.

While wood screws, thread forming screws, and self-tapping screws also play important roles in fastening, their design and application may allow some situations where slight bends could be ignored or corrected. However, the critical precision and application of machine screws elevate the importance of using them in pristine condition for reliable and safe performance.

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Thread forming screws

Self-tapping screws

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