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IRRSP PRACTICE TEST EXAM STUDY MATERIALS QUESTION AND ANSWERS (VERIFIED ANSWERS)
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IRRSP PRACTICE TEST EXAM STUDY MATERIALS QUESTION AND ANSWERS (VERIFIED ANSWERS)
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ESTUDYIRRSP PRACTICE TEST EXAM STUDY MATERIALS
QUESTION AND ANSWERS (VERIFIED ANSWERS)
1. **The term "Curie" defines:**
- a. The exposure of a radioactive source
- b. The intensity of a radioactive source
- c. The activity of a radioactive source
- d. The output of a radioactive source
- **ANSWER:** c. The activity of a radioactive source
2. **Which of the following are symptoms of acute extremity overexposure?**
- a. Nausea, vomiting, diarrhea
- b. Fatigue, nausea, reddening of the skin
- c. Diarrhea, blistering, loss of hair
- d. Reddening of the skin, loss of hair, blistering
- **ANSWER:** d. Reddening of the skin, loss of hair, blistering
3. **The reason gamma radiation emitted from a Cobalt-60 source is more penetrating than that from
Iridium-192 is due to:**
- a. Higher output per Curie from the Co-60
- b. Longer half-life of the Co-60
- c. Greater intensity from the Co-60
- d. Higher gamma ray energy from the Co-60
,ESTUDY
- **ANSWER:** d. Higher gamma ray energy from the Co-60
4. **A 0.400 inch piece of lead shielding will reduce the radiation intensity from an Iridium-192 source
by:**
- a. 3/4
- b. 1/2
- c. 1/4
- d. 1/8
- **ANSWER:** a. 3/4
5. **When shielding against high-energy gamma rays, which of the following characteristics provide the
most effective shield?**
- a. Thick section of material
- b. Thick section of high atomic number material
- c. Thick section of low atomic number material
- d. Thick section of low density material
- **ANSWER:** b. Thick section of high atomic number material
6. **The radiation intensity at 1 foot from an Iridium-192 source is 452.4 R/hr. What is the radiation
intensity at 14 feet?**
- a. 2.31 R/hr
- b. 226.2 R/hr
- c. 113.1 R/hr
, ESTUDY
- d. 32.3 R/hr
- **ANSWER:** a. 2.31 R/hr
7. **Gamma radiation can be defined as:**
- a. Particles having the mass and charge of two protons and two neutrons emitted from the nucleus of
an unstable atom
- b. Very light negatively charged particles emitted from the nucleus of an unstable atom
- c. Very short wavelength electromagnetic radiation emitted from the nucleus of an unstable atom
- d. Particles emitted from an unstable atom with an energy in the range of 1 to 10 M.E.V.
- **ANSWER:** c. Very short wavelength electromagnetic radiation emitted from the nucleus of an
unstable atom
8. **The term that describes how gamma or X-rays are reduced in intensity when passing through
shielding material is:**
- a. Penetration
- b. Scatter
- c. Reflection
- d. Attenuation
- **ANSWER:** d. Attenuation
9. **The annual radiation exposure limits for a radiographer or an assistant can be summarized by:**
- a. 1.25 Rem to the whole body, 18.75 Rem to the extremities
- b. 20 Rem to the whole body, 200 Rem to the extremities
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