Which of the following factors affect the dose you receive?

• A. Time spent
• B. Shielding present
• C. All of the above
• D. Distance to source

Answer: (C)

Exposure dose is controlled by three practical factors you can influence in a work setting: how long you remain in the radiation area, how close you are to the source, and what shielding is between you and the source. Time spent in the field directly increases the total dose you accumulate. Shielding reduces the dose rate by absorbing or attenuating the radiation before it reaches you. Distance matters through the inverse square relationship: increasing your distance from the source dramatically lowers the dose rate, since it drops with the square of the distance. Because each factor independently lowers exposure, the total dose you receive is determined by all of them together. So, the correct choice is all of the above. Practical takeaway: minimize time in the area, maximize distance when possible, and use shielding to reduce dose.