Texas Industrial Radiography Gamma Practice Test

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Prepare for the Texas Industrial Radiography Gamma Test with multiple choice questions and detailed explanations. Master key topics and pass your certification with confidence!

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In a radiation field of 400 mr/hr, how long would it take to receive a dose of 100 mrem?

15 minutes
23 minutes
40 minutes
4 minutes

The correct answer is: 15 minutes

To determine how long it would take to receive a dose of 100 mrem in a radiation field of 400 mR/hr, it is essential to understand the relationship between dose rate and time. The dose rate indicates how much radiation exposure is received per hour. In this case, the dose rate is 400 mR/hr. To find the time required to accumulate a total dose of 100 mrem, you can use the formula: Time (in hours) = Total Dose (in mrem) / Dose Rate (in mR/hr) Plugging in the numbers: Time = 100 mrem / 400 mR/hr = 0.25 hours To convert hours into minutes, multiply by 60: 0.25 hours × 60 minutes/hour = 15 minutes. Thus, the time required to receive a dose of 100 mrem in a radiation field of 400 mR/hr is indeed 15 minutes. This calculation is directly tied to how radiation exposure accumulates over time, emphasizing the importance of understanding radiation dose rates for safety in industrial radiography.