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The effective dose from a single routine computerized tomography (CT) scan examination of the chest in the UK on the average is: A) 2 Gy B) 43 mGy C) 125 mGy D) 8 mGy E) 27 Gy The correct answer is: D Health Physics Journal Vol 69 No 5 (Webster 1995)
Theraputic radionuclides are used to deliver large doses of radiation in the treatment of cancer. Brachytherapy includes: A) placement of radioactive material in the brachial artery B) placement of radioactive material in direct contact with tumors C) inhalation of radionuclide to treat cancer of the bronchi D) irradiation of cancer tumors with external sources of radiation E) irradiation of bronchi by external radiation sources to treat lung cancer The correct answer is: B "..involves the placement of radioactive material in direct contact with tumors. It is reserved for tumors that are accesible via natural body cavities, or on body surfaces. I-125, Cs-137, Ir-192 and Au-198 are commonly used brachytherapy materials. Contemporary Health Physics: Problems and Solutions Joseph Bevlacqua
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For calculating dose to an organ fr
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The major radiological health conce
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A x-ray machine is operated in a cl
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The goal and future requirement reg
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A Pu-Be source should be stored: A)
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In the shielding equation I = Io e^
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Which of the following is the MOST
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How are tools or equipment transfer
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Which of the following surveys shou
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The following dosimetry should be w
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When using a charcoal cartridge wit
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The use of a Radioactive Yellow III
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Remediation of areas contaminated w
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Leak test of sealed radioactive sou
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The two organzations which review a
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Which of the following contributes
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Which of the following are distingu
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In planning shielding for walls of
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Most operating light water nuclear
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Which of the following is in the or
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The linear attenuation coefficient
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If a shielding material has a half-
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The units used to express u/p (mu o
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Air sample results from an unoccupi
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The minimum recommended face veloci
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An air sampler is run for 45 minute
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A fixed air filter at a nuclear pow
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The agency which approves the desig
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A respirator containing a high effi
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The maximum allowable radiation lev
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At what level does loose alpha cont
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According to the BEIR V Report, the
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Allowable radiation and contaminati
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The four emergency classifications
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A technician responds with emergenc
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The amount of shielding required to
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The transport index is determined a
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The BEST shielding for a Phosphorus
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As a result of Three Mile Island ac
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Radioactive material may be transpo
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What is the attenuation coefficient
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The MAIN purpose of isokinetic samp
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A toluene and P-32 spill occurs in
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The dose buildup factor is 5 at the
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What is the appropriate method of u
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Immediate telephone notification to
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After shutdown of a particle accele
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In a linear accelerator radiation s
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Personnel monitoring equipment is r
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A nurse drops a 30 millicurie liqui
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An air sample is run at 2 cubic fee
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In shielding sources which produce
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Radioactive liquids may be transpor
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The protection factor for an atmosp
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A shield has to be constructed in f
Page 111 and 112: Reactor chemistry samples are often
Page 113 and 114: When sampling for radioactive fallo
Page 115 and 116: One DAC-hour is approximately equal
Page 117 and 118: Which of the following materials wi
Page 119 and 120: When is a neutron radiation survey
Page 121 and 122: Why should swipes in a loose-surfac
Page 123 and 124: World population exposures due to f
Page 125 and 126: Strict adherence to ICRP Publicatio
Page 127 and 128: ICRP recommends a weighting factor
Page 129 and 130: ICRP Publication 26 states, "No pra
Page 131 and 132: To limit possible exposure to radia
Page 133 and 134: In emergency planning, a "protectiv
Page 135 and 136: State the purpose of the main steam
Page 137 and 138: The radionuclide that is the main c
Page 139 and 140: If personnel with doses less than 1
Page 141 and 142: Prior to 1988, explicit recommendat
Page 143 and 144: In general, the most important sour
Page 145 and 146: When communicating information rega
Page 147 and 148: The ordering of the following shiel
Page 149 and 150: Which of the following statements a
Page 151 and 152: If the most restrictive airborne ra
Page 153 and 154: The maximum protection factor that
Page 155 and 156: For regulatory compliance purposes,
Page 157 and 158: The radionuclide used to improve op
Page 159 and 160: The target and filter material used
Page 161: Most newer mammographic units conta
Page 165 and 166: Radiation leakage from an x-ray tub
Page 167 and 168: The dominant external radiation haz
Page 169 and 170: Power reactors do not routinely cou
Page 171 and 172: The occupation limit for radon expo
Page 173 and 174: Monitoring of nuclear power plant e
Page 175 and 176: Sample lines for plant vents must b
Page 177 and 178: The code of Federal Regulations, 40
Page 179 and 180: During the early phase of an accide
Page 181 and 182: A radioactive shipment is being pre
Page 183 and 184: The effective dose equivalent allow
Page 185 and 186: The amount of tritium allowed by 10
Page 187 and 188: An individual has received an intak
Page 189 and 190: The class "D" in Appendix B to part
Page 191 and 192: The concentration values given in T
Page 193 and 194: The Department of Energy's yearly a
Page 195 and 196: A DOE radiation worker has a lifeti
Page 197 and 198: The best way to reduce the volume o
Page 199 and 200: A Notice of Violation will not be i
Page 201 and 202: After exposure rates from radioacti
Page 203 and 204: The leakage radiation from a diagno
Page 205 and 206: What neutron quality factor did the
Page 207 and 208: According to 10 CFR 20 radiological
Page 209 and 210: Which of the following Regulatory G
Page 211 and 212: Which of the following is NOT true
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According to the EPA, a home should
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A shipment of radioactive materials
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The tissue weighting factor for the
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According to NUREG-0713, which of t
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According to 10 CFR 20 the definiti
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According to 10 CFR 20, how often d
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You work at a nuclear power plant,
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A safe geometry to prevent critical
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Which of the following bioassay met
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Radiobiological evidence suggests t
Page 233 and 234:
The "planned special exposure" prov
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A female radiation worker declares
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The iodine isotope that would deliv
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A Type A quantity of radioactive ma
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When working with liquid solutions
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At a nuclear power reactor facility
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Doses to the thyroid and whole body
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The term "reference man" in health
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According to 10 CFR 20 Appendix A,
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The Radioactive Yellow II and III l
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For an exclusive use, closed transp
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Which of the following regulations
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The sensitivity of photographic fil
Page 259 and 260:
If the DAC for Rn-222 is 3.0 E-8 mi
Page 261 and 262:
The full width at half maximum peak
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What are the constituents of the fi
Page 265 and 266:
A meter reads 40,000 net cpm and th
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According to ANSI N323-1978, portab
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Common radionuclides used for the c
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How long must a sample with a count
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Quality factor is a function of the
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A proper average quality factor for
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A point source of 137-Cs with an ac
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An individual breathes a concentrat
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A person is standing in a semi-infi
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Personnel dosimetry records must be
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How is beta exposure determined in
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The major internal pathway for radi
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Which of the following radionuclide
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Proportional counters operate at __
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The sensitivity of a pressurized io
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If 100 counts are recorded with a d
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A tissue-equivalent chamber must: A
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The full width at half maximum peak
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A stack is 5 feet in diameter, the
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A sample counted for ten minutes re
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The purpose of a "chi-squared" test
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A worker is exposed to different ra
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Assuming a maximum permissible dose
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You measure the dose rate at a job
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The exposure rate from a point sour
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According to the ICRP, "ALI" stands
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What happens to the noble gases aft
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The detection of radioactive tritiu
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The approximate exposure rate (R/hr
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What materials are most commonly us
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An individual breathes a concentrat
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The MOST effective bioassay method
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According to 10 CFR Part 20, the qu
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When calibrating radiation detectio
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Which of the following is the best
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The DAC for inert gases is based on
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The absorbed dose from the alpha pa
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An Airborne Radioactivity Area must
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Albedo dosimetry will function prop
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What is the ionization region? A) t
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The difference between x-ray and ne
Page 347 and 348:
Three different labs measure the sa
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An ionization chamber which as a di
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A NaI counting system would be appr
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A person is standing in a semi-infi
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The net counts observed from succes
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For NaI and GeLi detectors, as gamm
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Ar-41 is a noble gas which decays b
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The exposure rate at two feet from
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A worker spends 90 minutes in a fie
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Obtaining reproducible results duri
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A worker stands 12 feet from a gamm
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Determine the mean of the following
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The full width of a given photopeak
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In the G-M region of a gas filled t
Page 375 and 376:
Which of the following materials is
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The average number of ion pairs pro
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An important advantage of using a h
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The target organ for most transport
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The short-lived Radon (Rn-222) deca
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Which material is most likely to io
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In a field of mixed neutron and gam
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Tissue dose from thermal neutrons p
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The provisions of ANSI N13.11-1983
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If the skin were contaminated by an
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Which statement is most accurate? A
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Measurement uncertainty in a radiat
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What is the most efficient ratio of
Page 401 and 402:
When performing in-vivo measurement
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Gas and aerosol detectors (smoke de
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To obtain count rates that will fal
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Germanium-Lithium semiconductor det
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One of the components of the liquid
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A sample containing tritium, Carbon
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Quenching effects in a liquid scint
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A gamma spectrometer spectrum of a
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You are analyzing a sample containi
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To improve the efficiency of an ins
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You are assigned to count a number
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The method used to determine the am
Page 425 and 426:
In a gas filled detector a low volt
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A gas-filled detector in which the
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A semi-conductor is distinguished f
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An "acceptor" substance in a semi-c
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The secondary emission ratio of a p
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Methods used to reduce the amount o
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For protons and neutrons, most of t
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A long counter is encased in a cadm
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Choose the BEST answer that describ
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In a photomultiplier tube with 7 dy
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A dose of 20 rem from alpha radiati
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The efficiency for collecting ion p
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Which planchet material would yield
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Which of the following reactions is
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Which of the following has a densit
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A 1Kg block of ice and a 1 Kg block
Page 457 and 458:
The difference between the energy 1
Page 459 and 460:
The process of transferring photon
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Given a uniform disk source of radi
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A photon with a linear attenuation
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The buildup factor used in shieldin
Page 467 and 468:
The half-value thickness for 1 MeV
Page 469 and 470:
BF3 gas filled detectors frequently
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A GM detector with a resolving time
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Electrons that are initially at res
Page 475 and 476:
For general area radiation surveys,
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For a gas filled detector operating
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For a typical NaI scintillation det
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What is the approximate efficiency
Page 483 and 484:
The largest respirable particle is
Page 485 and 486:
A worker wearing a respirator with
Page 487 and 488:
The term solubility or transportabi
Page 489 and 490:
Which is the major factor in consid
Page 491 and 492:
The most important types of environ
Page 493 and 494:
The fraction of unattached radon de
Page 495 and 496:
Why is the thumb rule formula X = 6
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A low energy alpha detector is usua
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A sample of radioactive material is
Page 501 and 502:
A worker accidentally ingested one
Page 503 and 504:
Conjunctivitis may result from a we
Page 505 and 506:
Eventually, charged particles give
Page 507 and 508:
Gamma rays get their energy from: A
Page 509 and 510:
What is the usual unit of measureme
Page 511 and 512:
Normal background radiation exposur
Page 513 and 514:
Plutonium, taken into the circulato
Page 515 and 516:
The average person contains about 0
Page 517 and 518:
The current OSHA standard for far f
Page 519 and 520:
The fraction of atoms which undergo
Page 521 and 522:
The portion of the body most suscep
Page 523 and 524:
The gray is a quantity used to expr
Page 525 and 526:
A very thin windowed Geiger-Mueller
Page 527 and 528:
What is the charge produced in a 25
Page 529 and 530:
What is one of the special units us
Page 531 and 532:
When a charged particle strikes an
Page 533 and 534:
Which of the following is a Beta em
Page 535 and 536:
Which one of the following types of
Page 537 and 538:
What will the activity of 10 Ci of
Page 539 and 540:
Radon has been estimated to account
Page 541 and 542:
Two cost effective means available
Page 543 and 544:
Higher atomic weight (Z) elements t
Page 545 and 546:
Under the SI system there have been
Page 547 and 548:
Smokers have increased exposure to
Page 549 and 550:
When ionizing energy ejects an elec
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What is the decay constant for Carb
Page 553 and 554:
A scintillation counter takes advan
Page 555 and 556:
Radioactive decay is said to be fir
Page 557 and 558:
How long will it take for 200 Ci of
Page 559 and 560:
If an individual incurred a dose eq
Page 561 and 562:
A "pig" is a: A) Container used to
Page 563 and 564:
What is a "neutrino"? A) Massless p
Page 565 and 566:
What is elastic scattering of a pho
Page 567 and 568:
What is the "photoelectric effect"
Page 569 and 570:
What happens to the incident photon
Page 571 and 572:
Which effect predominates in the 10
Page 573 and 574:
What effect predominates in the gre
Page 575 and 576:
What is the SI unit of activity? A)
Page 577 and 578:
The equivalent energy for the rest
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Which of the following is isobaric
Page 581 and 582:
Name the initial and final nuclide
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Name the initial and final member o
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Plutonium: A) Occurs naturally B) I
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What is a use of a chelating agent?
Page 589 and 590:
The periodic table lists: A) All el
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A radionuclide that is constantly b
Page 593 and 594:
The target organ for consideration
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If Kr-90 is released from the stack
Page 597 and 598:
In a radioactive decay process in w
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In a radioactive decay process in w
Page 601 and 602:
A build-up factor equal to one in a
Page 603 and 604:
Radiation in the visible spectrum t
Page 605 and 606:
The energy distribution of alpha em
Page 607 and 608:
Radium is considered to be a ______
Page 609 and 610:
A proportional counter has enough v
Page 611 and 612:
A Geiger counter should never have
Page 613 and 614:
Proportional counters have gas ampl
Page 615 and 616:
The primary function of a radiation
Page 617 and 618:
What is the approximate efficiency
Page 619 and 620:
For what reason is a mica window us
Page 621 and 622:
The function of a cascade impactor
Page 623 and 624:
The "end window" on a Geiger-Muelle
Page 625 and 626:
The term "acute radiation syndrome"
Page 627 and 628:
A fundamental law in radiobiology t
Page 629 and 630:
For transportation of radioactive m
Page 631 and 632:
Which radiation monitoring device u
Page 633 and 634:
The pancake GM probe is designed fo
Page 635 and 636:
Human excreta containing medically
Page 637 and 638:
What is a "phantom" in reference to
Page 639 and 640:
The Department of Transportation (D
Page 641 and 642:
Page 643 and 644:
Page 645 and 646:
KERMA is a unit of radiation measur
Page 647 and 648:
How does the NRC regulate x-ray mac
Page 649 and 650:
The SI unit for radiation absorbed
Page 651 and 652:
The SI unit of activity is the: A)
Page 653 and 654:
The underlying principle for radior
Page 655 and 656:
As a charged particle loses energy
Page 657 and 658:
What is the mathematical relationsh
Page 659 and 660:
The "lapse rate" is the: A) Tempera
Page 661 and 662:
The best data to use to estimate th
Page 663 and 664:
What is a disadvantage of a long sa
Page 665 and 666:
Given a reading of 100 mr/hr (gamma
Page 667 and 668:
Which of the following is not a nat
Page 669 and 670:
The occupational derived air concen
Page 671 and 672:
What does an "alpha" emission consi
Page 673 and 674:
A radium decay scheme is represente
Page 675 and 676:
In the beta particle decay of stron
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What is a Roentgen? A) The amount o
Page 679 and 680:
Why are the low atomic number mater
Page 681 and 682:
The TLV for exposure to radiation f
Page 683 and 684:
Which of the following series is an
Page 685 and 686:
In an absorbing medium, one gray (1
Page 687 and 688:
A one liter Marinelli air sample is
Page 689 and 690:
If an atom is assembled from its co
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You have 400 millicuries of a radio
Page 693 and 694:
The difference between x-rays and g
Page 695 and 696:
A 7 mg/cm2 mylar window is used on
Page 697 and 698:
Effects of acute radiation exposure
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What is the "threshold" of radiatio
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Page 703 and 704:
Most of the dose received by man fr
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For an isotope having an allowed co
Page 707 and 708:
All of the following statements abo
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Isotopes are: A) different radionuc
Page 711 and 712:
Which of the following has the high
Page 713 and 714:
Following electron capture, the fol
Page 715 and 716:
A technician surveys a shielded pur
Page 717 and 718:
In the interaction of thermal neutr
Page 719 and 720:
Which of the following organ system
Page 721 and 722:
Page 723 and 724:
Why are the dose equivalent limits
Page 725 and 726:
Why is a child more radiosensitive
Page 727 and 728:
If a large group of people receive
Page 729 and 730:
What is the main factor determining
Page 731 and 732:
The range of a 2 MeV alpha particle
Page 733 and 734:
An isotope is one of two or more at
Page 735 and 736:
The symbols Pa, Ga, Sn, Ni represen
Page 737 and 738:
If the maximum beta particle energy
Page 739 and 740:
The major source of radiation expos
Page 741 and 742:
In the energy range from 0.1 to 5 M
Page 743 and 744:
The Roentgen is a measure of: A) ab
Page 745 and 746:
The antineutrino is associated with
Page 747 and 748:
The three types of blood cells in t
Page 749 and 750:
The range of an alpha particle in t
Page 751 and 752:
After four half-lives, the original
Page 753 and 754:
Workers are exposed to a Cs-137 con
Page 755 and 756:
Based on the 1990 BEIR V Report, th
Page 757 and 758:
Based on the laws of Bergoinie and
Page 759 and 760:
Which one of the following lists th
Page 761 and 762:
Genetic mutations are one possible
Page 763 and 764:
The roentgen is equal to: A) 1.0 co
Page 765 and 766:
Cancer induced by radon daughters i
Page 767 and 768:
Unlike many man made materials, whe
Page 769 and 770:
Deleterious effects caused by radia
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Cigarette smokers who smoke 1.5 pac
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Sr-85 is used in the treatment of b
Page 775 and 776:
Uranium and Thorium decay products
Page 777 and 778:
The relationship between the mass o
Page 779 and 780:
The NRC defines a hot particle as a
Page 781 and 782:
Uptake and retention of a radionucl
Page 783 and 784:
An active person who eats a high fi
Page 785 and 786:
Cesium-137 decays by emitting: A) t
Page 787 and 788:
A mole of U-238 weighs: A) 238 amu
Page 789 and 790:
The SI unit of energy is: A) Siever
Page 791 and 792:
The nucleus transfers its energy to
Page 793 and 794:
The formula for calculating specifi
Page 795 and 796:
A radionuclide with a parent half-l
Page 797 and 798:
As an alpha particle transverses a
Page 799 and 800:
The average energy of a positron em
Page 801 and 802:
The stopping power for electrons __
Page 803 and 804:
Kerma is the sum of the initial kin
Page 805 and 806:
The term used to describe a process
Page 807 and 808:
Rn-220 is a member of which of the
Page 809 and 810:
Which of the following naturally oc
Page 811 and 812:
An absorbed dose of 3 rad results i
Page 813 and 814:
Which of the following is equivalen
Page 815 and 816:
The electron volt is: A) a unit of
Page 817 and 818:
Which of the following does NOT aff
Page 819 and 820:
If the half life of a radionuclide
Page 821:
Which of the following is the BEST
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