Visual Testing (VT) Practice Exam 2025 - Free VT Exam Practice Questions and Study Guide

A narrow angle of view in a bore scope is primarily required for high magnification. This is because a narrow angle allows for a more concentrated field of vision, which is essential when magnifying a small area. It helps to accurately visualize fine details without the distraction of surrounding elements, enabling better precision in inspection tasks.

In the context of using a bore scope, high magnification is essential for examining intricate components or areas that require detailed observation, such as engine parts, welding seams, and other precision components. This clear and focused view is critical for technicians and engineers who must analyze specific features and ensure their quality or detect any potential issues.

The other options relate to different aspects of visual inspection but do not directly correlate with the benefits of a narrow angle of view in the same way that high magnification does. Greater depth of field, for example, typically requires a wider field of view, allowing for more of the scene to be in focus, which is not the hallmark of a narrow angle.