Texas Industrial Radiography Gamma Practice Test

One Roentgen per hour is equal to approximately:

1. 100 millirems per hour

2. 1000 millirems per hour

3. 1 Rem per hour

4. Both B and C

The correct answer is: Both B and C

The correct answer indicates that one Roentgen per hour is approximately equivalent to 1000 millirems per hour and also to 1 Rem per hour. This equivalency is crucial in the field of radiography and radiation protection, as it helps professionals understand and communicate radiation dose levels in terms that are widely recognized and easily calculable. 1 Roentgen is a unit that measures the amount of ionization produced in air by X-rays and gamma radiation. When considering the relationship between Roentgen and the dose received by a person, it is commonly accepted that 1 Roentgen corresponds to 1 Rem for X-ray and gamma radiation in terms of biological effect on tissue when considering the quality factor for X-rays. Moreover, since 1 Rem equals 1000 millirems, this provides the necessary conversion for understanding dose in smaller units that may be used in regulatory contexts or safety guidelines. Understanding these conversions is essential for professionals in radiography, as it ensures that safety measures and exposure limits are adhered to based on scientific measurements and established guidelines.