Which set of controls is used to minimize radioactive contamination through exposure?

Which set of controls is used to minimize radioactive contamination through exposure?

• A. Time, shielding, distance
• B. Distance, shielding, time
• C. Shielding, distance, time
• D. Time, distance, shielding

Answer: (D)

The main idea is using the three basic controls to limit radiation exposure: time, distance, and shielding. Reducing the time you spend near a source lowers the total dose you receive. Increasing your distance from the source has a strong effect because radiation intensity drops off quickly with distance. Shielding adds a barrier that absorbs or deflects radiation before it reaches you. Using all three together provides the best protection, since each control addresses exposure in a different way. Omitting any one of them weakens protection, while listing all three covers the full protective approach.

The main idea is using the three basic controls to limit radiation exposure: time, distance, and shielding. Reducing the time you spend near a source lowers the total dose you receive. Increasing your distance from the source has a strong effect because radiation intensity drops off quickly with distance. Shielding adds a barrier that absorbs or deflects radiation before it reaches you. Using all three together provides the best protection, since each control addresses exposure in a different way. Omitting any one of them weakens protection, while listing all three covers the full protective approach.