INBDE (Integrated National Board Dental Examination) 2026 – 400 Free Practice Questions to Pass the Exam

Increasing the kilovoltage peak (kVP) setting in an X-ray machine has the effect of increasing both the quantity and quality of the X-rays produced.

When kVP is increased, more X-ray photons are produced, which increases the quantity of X-rays. Additionally, higher kVP settings result in X-rays with greater energy levels, leading to improved penetration through tissues and better image quality due to increased contrast.

This is why the correct answer is "C. Increases quantity and quality."

The other options are incorrect because decreasing kVP would lead to a decrease in both quantity and quality of the X-rays.