Which capability is listed for VDR-2?

• A. Measure residual gamma
• B. Detect alpha, beta, gamma, and x-ray
• C. Handheld
• D. 3 probes

Answer: (A)

The capability being tested is measuring residual gamma radiation. In health physics, residual gamma refers to the gamma radiation that remains after shielding, contamination control, or cleaning has been applied. A device designed for this purpose is a gamma-specific survey instrument that can quantify the remaining gamma dose rate on surfaces or in air, which is essential for assessing cleanup effectiveness and ensuring safety.

That VDR-2 is listed as able to measure residual gamma fits its role as a gamma-focused instrument used in remediation and decontamination surveys. The other options describe broader or different capabilities (detecting multiple radiation types, being handheld, or using multiple probes) that aren’t the specific functionality highlighted for VDR-2 in this context.