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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 characteristic provides 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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