NRRPT
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| 1. The transmission of characteristic x-rays through the same element filter as the target results in a nearly monoenergetic output of the x-ray tube around: | show 🗑
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| show | 4440 dpm
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| show | the distance downwind from the reactor that a person may receive either a dose of 25 rem to the whole body or 300 rem to the thyroid if he stands there for two hours after the onset of the postulated accident
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| 4. Germanium-Lithium semiconductor detectors are limited by count rate due to: | show 🗑
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| 5. Tissue dose from thermal neutrons is principally a result of: | show 🗑
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| show | 2,3,4
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| 7. Of the following cell types, which is LEAST radiosensitive? | show 🗑
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| 8. Plutonium: | show 🗑
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| show | beta
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| show | the projected dose which warrants protective action to be taken
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| show | cm2/g
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| 12. What would be a good approximation of the quality factor (QF) of the neutrino? | show 🗑
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| 13. The quality factor refers to all the following except: | show 🗑
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| show | Between 500 µSv per hr and 2000 µSv per hr
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| show | 5 mSv
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| show | Curie
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| 17. Which particle is considered to be radioactive by itself? | show 🗑
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| show | radiation workers have continuous monitoring of their exposure and the work environment is continuously monitored
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| show | Uranium-238
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| 20. A sample is measured using a proportional counter. 100 counts are observed in seven minutes. What is the counting rate and its associated standard deviation? | show 🗑
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| show | Alpha, beta, gamma
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| 22. If the sample plus background is 1600 counts in one minute and the background is 900 counts in one minute, the net count is 700 counts per minute plus or minus ______ counts per minute (1 standard deviation). | show 🗑
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| show | Rem
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| show | by the letters "NS" after the value
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| show | with the name of the organ limited by the dose
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| show | the owner of the licensed facility
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| show | Eliminate Bremmsstrahlung
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| show | KI must be given before the intake starts to have a beneficial effect
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| show | 50% and 65%
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| 30. In the G-M region of a gas filled type detector, the output: | show 🗑
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| show | the gas, water, and electrical appliances should be operated from inside the fume hood
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| 32. Radioactive atoms that have a neutron to proton ratio that is great will decay by: | show 🗑
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| show | They are affected by temperature
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| show | 1 liter air with emission of 1.3 E5 MeV alpha
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| 35. Which of the following radionuclides is a bone seeker? | show 🗑
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| 36. Half-value thickness for 1 MeV photons in lead is approximately 1 cm. A 100 mCi Zn-65 1.12 MeV/photon point source produces a dose rate of 30 mR/hr at 1 meter. What is the exposure rate at 10 cm from this source with the addition of a 5 cm lead shield | show 🗑
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| show | 33.7 eV
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| 38. The approximate diameter of an atomic nucleus is: | show 🗑
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| show | the specific activity of Carbon-14 in living organisms is relatively constant through time, but decays after the death of the organism
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| show | Industrial Radiography
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| 41. The underlying principle for radioresponse of a mammalian tissue is called the Law of _________. | show 🗑
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| show | 1
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| show | is less likely to cause skin cancer
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| show | Greater than 1
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| show | 100,000 dpm
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| 46. The maximum allowable radiation level at contact of a package shipped in other than an exclusive use vehicle | show 🗑
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| show | band gap
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| 48. What is a "neutrino"? | show 🗑
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| show | 0.4%
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| show | recombination
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| show | escape of one or more air production gammas from the detector
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| 52. The class “D” in Appendix B to part 20 applies to a range of clearance half lives: | show 🗑
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| 53. Which of the following is in the order of MOST effective to LEAST effective shielding materials for gamma radiation sources? | show 🗑
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| show | a mild soap
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| 55. Which of the following is one function of the ALARA program? | show 🗑
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| 56. Consider a proportional detector operated at a constant voltage. Based only on the statistical fluctuations, which of the following fill gases would you expect to have the lowest percent resolution? | show 🗑
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| show | alpha decay
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| 58. The minimum detectable activity for a counting system is: | show 🗑
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| show | critical mass
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| 60. A shield has to be constructed in front of a hot spot to reduce the exposure rate by 80%. The half value layer for the shielding is one-quarter inch. What is the minimum number of shielding thicknesses required? | show 🗑
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| show | Alpha
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| show | K-40
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| show | isotopes
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| 64. Assuming a normal cancer fatality rate of 20%, what would be the total probability of developing a fatal cancer for a group of occupationally exposed workers with a 3 in 1,000 probability of contracting a radiation induced fatal cancer. | show 🗑
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| show | 8.13
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| 66. A tissue-equivalent chamber must: | show 🗑
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| show | Cut out a square piece of material, send it to the chemistry lab to be weighed and divide the weight by the area of the material.
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| show | semi-annually for confirmation
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| 69. When leak testing an industrial radiography source, the contamination sample should be obtained: | show 🗑
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| show | collision stopping power of the radiation in water
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| 71. The SI unit for radiation absorbed dose is the: | show 🗑
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| show | prevent the light from being trapped in the phosphor
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| show | the final carrier and the NRC Regional office
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| 74. The following are considered as risks of chronic low-level radiation exposure: 1) Sterility 2) Leukemia 3) Cataracts 4) Skin erythema | show 🗑
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| 75. A chemical which has shown some success as an internal chelating agent for plutonium is: | show 🗑
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| 76. A counting rate of 40 cpm is measured in 2 minutes. What is the standard deviation of this counting rate? | show 🗑
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| 77. The average energy expended to produce an ion pair is called: | show 🗑
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| 78. The target organ for most transportable long-lived alpha emitters is: | show 🗑
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| 79. Which of the following detectors operates in a voltage region where gas multiplication effects are observed? | show 🗑
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| show | 10
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| 81. What is the ionization region? | show 🗑
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| 82. Technecium-99m is | show 🗑
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| show | Airborne particles
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| 84. Which of the following bioassay methods may be found in an Uranium facility? | show 🗑
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| show | Potassium-40
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| show | NRC does not regulate x-ray machines
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| 87. Measurement uncertainty in a radiation measuring device is a function of: | show 🗑
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| 88. The net counts observed from successively counting a sample are plotted on semilog paper, and the plot forms a curved line. It is probable that: | show 🗑
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| show | Broad beam conditions
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| 90. What scintillator material has a high efficiency for alpha measurement and is not especially affected by temperature, humidity, and barometric pressure? | show 🗑
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| 91. In what way can we establish whether or not an individual could exceed some percent of the DAC? | show 🗑
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| 92. An individual living in Denver, Colorado (elevation 5280 ft above sea level) could expect to receive an average annual dose equivalent due to cosmic radiation of approximately: | show 🗑
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| 93. You are assigned to count a number of environmental samples. To meet the required LLDs you need to adjust a number of the counting parameters. To increase the LLD value what must you do to: sample size, count time and detector background? | show 🗑
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| show | five minutes
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| show | assess the effectiveness of administrative and physical controls of the radiation protection program for tritium
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| 96. When transporting a Highway Route Controlled Quantity of radioactive material outside of the licensee’s state, notification must be made to: | show 🗑
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| 97. Decontamination of a hot cell is most easily accomplished if the hot cell is: | show 🗑
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| show | albedo TLD, self-reading quartz fiber dosimeter and beta-gamma responsive TLD
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| 99. The minimum recommended face velocity for a fume hood is: | show 🗑
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| show | 16
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Created by:
Kpminton
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