Pennsylvania Barber Licensure Practice Exam

When clipper or trimmer blades are adjusted flush to each other, there is no space between the blades for hair to pass through. This results in the blades pinching the hair instead of cutting it cleanly, causing irritation, cuts, and ingrown hairs. Option A is incorrect because it does not directly relate to the spacing of the blades. Option B is incorrect because it does not explain the potential consequences of adjusting the blades flush. Option D is incorrect because it does not address the negative effects on the hair or skin.