RAd 113 Chapter 4 Quiz PDF

**RAd 113 chapter 4 quiz** Question **1** What theory relates the ionization produced in a small cavity within an irradiated medium or object to the energy absorbed in that medium as a result of its radiation exposure? Bragg-Gray Question **2** As the intensity of x-ray exposure of the air volu...

**RAd 113 chapter 4 quiz** Question **1** What theory relates the ionization produced in a small cavity within an irradiated medium or object to the energy absorbed in that medium as a result of its radiation exposure? Bragg-Gray Question **2** As the intensity of x-ray exposure of the air volume increases, the number of electron-ion pairs produced also increases. Question **3** In the SI system, an energy absorption of 1 J/kg of matter in the irradiated object equals which of the following? 1 Gy Question **4** For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV), which of the following radiation quantities may be defined as the measure of the total electrical charge of one sign, either all pluses or all minuses, per unit mass that these two types of radiation generate in dry air (i.e., nonhumid) at standard temperature and pressure (760 mm Hg or 1 atmosphere at sea level and 22° C)? Exposure Question **5** The whole-body TEDE regulatory limit for exposed personnel is \_\_\_\_\_\_\_\_\_\_\_\_\_ and \_\_\_\_\_\_\_\_\_\_\_\_\_\_ for the general public. 0.05 Sv; 0.001 Sv Question **6** Cataract formation, fibrosis, reduced fertility, and sterility are classified as late tissue reactions of ionizing radiation. Question **7** The total kinetic energy released in a unit mass (kilogram) of air and expressed in metric units of joules per kilogram is air kerma. Question **8** Among physicians, cancer deaths attributed to x-ray exposure were reported as early as 1910. Question **9** Beta particles are actually high-speed electrons. Question **10** 0.2 Gy equals 200 mGy. Question **11** Which of the following is essentially the sum total of air kerma over the exposed area of the patient\'s body surface? Dose area product Question **12** Who discovered x-rays on November 8, 1895? Wilhelm Conrad Roentgen Question **13** Who was the first American radiation worker to die from radiation-induced cancer in October of 1904? Clarence Madison Dally Question **14** What instrument can be calibrated to read air kerma? Standard, or free-air, ionization chamber Question **15** If 400 people receive an average effective dose of 0.25 Sv, what is the collective effective dose? 100 person-Sv Question **16** How is dose area product usually specified? In units of mGy-cm^2^ Question **17** Which of the following units of measure are not SI units? Roentgens and rads and rems Question **18** Which of the following is the SI unit of electrical current? Ampere Question **19** Which of the following are early tissue reactions of ionizing radiation that were experienced by early radiation workers?\ 1. Diffuse redness of skin\ 2. Blood disorders\ 3. Organ atrophy\ 4. Intestinal disorders 1, 2, and 4 only Question **20** In therapeutic radiology what SI units are now routinely used to specify absorbed dose? Gray and centigray