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An intake of one non-stochastic ALI by the specified route will result in: A) 5 rem committed dose equivalent to a tissue or organ B) 5 rem committed effective dose equivalent C) 50 rem committed dose equivalent to a tissue or organ D) 50 rem committed effective dose equivalent E) 50 rem total effective dose equivalent The correct answer is: C The non-stochastic ALI (nALI) is that amount of radioactive material which will produce a 50 year committed dose equivalent to an individual organ or tissue of 50 rems. The stochastic ALI (sALI) will produce a 50 year committed effective dose equivalent of 5 rems.
Which of the following radionuclides is most applicable to in-vivo measurements? A) H-3 B) C-14 C) S-35 D) I-131 E) Pu-239 The correct answer is: D Since I-131 is the only significant gamma-emitting nuclide shown, it is clearly the most applicable to in-vivo measurement. NOTE: Pu-239 does emit a weak gamma. All other nuclides shown are "pure beta-emitters".
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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
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Reactor chemistry samples are often
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When sampling for radioactive fallo
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One DAC-hour is approximately equal
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Which of the following materials wi
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When is a neutron radiation survey
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Why should swipes in a loose-surfac
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World population exposures due to f
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Strict adherence to ICRP Publicatio
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ICRP recommends a weighting factor
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ICRP Publication 26 states, "No pra
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To limit possible exposure to radia
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In emergency planning, a "protectiv
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State the purpose of the main steam
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The radionuclide that is the main c
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If personnel with doses less than 1
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Prior to 1988, explicit recommendat
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In general, the most important sour
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When communicating information rega
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The ordering of the following shiel
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Which of the following statements a
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If the most restrictive airborne ra
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The maximum protection factor that
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For regulatory compliance purposes,
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The radionuclide used to improve op
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The target and filter material used
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Most newer mammographic units conta
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Theraputic radionuclides are used t
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Radiation leakage from an x-ray tub
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The dominant external radiation haz
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Power reactors do not routinely cou
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The occupation limit for radon expo
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Monitoring of nuclear power plant e
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Sample lines for plant vents must b
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The code of Federal Regulations, 40
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During the early phase of an accide
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A radioactive shipment is being pre
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The effective dose equivalent allow
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The amount of tritium allowed by 10
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An individual has received an intak
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The class "D" in Appendix B to part
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The concentration values given in T
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The Department of Energy's yearly a
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A DOE radiation worker has a lifeti
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The best way to reduce the volume o
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A Notice of Violation will not be i
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After exposure rates from radioacti
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The leakage radiation from a diagno
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What neutron quality factor did the
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According to 10 CFR 20 radiological
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Which of the following Regulatory G
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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
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The "planned special exposure" prov
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A female radiation worker declares
Page 237 and 238: The iodine isotope that would deliv
Page 239 and 240: A Type A quantity of radioactive ma
Page 241 and 242: When working with liquid solutions
Page 243 and 244: At a nuclear power reactor facility
Page 245 and 246: Doses to the thyroid and whole body
Page 247 and 248: The term "reference man" in health
Page 249 and 250: According to 10 CFR 20 Appendix A,
Page 251 and 252: The Radioactive Yellow II and III l
Page 253 and 254: For an exclusive use, closed transp
Page 255 and 256: Which of the following regulations
Page 257 and 258: 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
Page 263 and 264: What are the constituents of the fi
Page 265 and 266: A meter reads 40,000 net cpm and th
Page 267 and 268: According to ANSI N323-1978, portab
Page 269 and 270: Common radionuclides used for the c
Page 271 and 272: How long must a sample with a count
Page 273 and 274: Quality factor is a function of the
Page 275 and 276: A proper average quality factor for
Page 277 and 278: A point source of 137-Cs with an ac
Page 279 and 280: An individual breathes a concentrat
Page 281 and 282: A person is standing in a semi-infi
Page 283 and 284: Personnel dosimetry records must be
Page 285 and 286: How is beta exposure determined in
Page 287: The major internal pathway for radi
Page 291 and 292: Proportional counters operate at __
Page 293 and 294: The sensitivity of a pressurized io
Page 295 and 296: If 100 counts are recorded with a d
Page 297 and 298: A tissue-equivalent chamber must: A
Page 299 and 300: The full width at half maximum peak
Page 301 and 302: A stack is 5 feet in diameter, the
Page 303 and 304: A sample counted for ten minutes re
Page 305 and 306: The purpose of a "chi-squared" test
Page 307 and 308: A worker is exposed to different ra
Page 309 and 310: Assuming a maximum permissible dose
Page 311 and 312: You measure the dose rate at a job
Page 313 and 314: The exposure rate from a point sour
Page 315 and 316: According to the ICRP, "ALI" stands
Page 317 and 318: What happens to the noble gases aft
Page 319 and 320: The detection of radioactive tritiu
Page 321 and 322: The approximate exposure rate (R/hr
Page 323 and 324: What materials are most commonly us
Page 325 and 326: An individual breathes a concentrat
Page 327 and 328: The MOST effective bioassay method
Page 329 and 330: According to 10 CFR Part 20, the qu
Page 331 and 332: When calibrating radiation detectio
Page 333 and 334: Which of the following is the best
Page 335 and 336: The DAC for inert gases is based on
Page 337 and 338: 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
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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
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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
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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
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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
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The difference between the energy 1
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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
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The half-value thickness for 1 MeV
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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
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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
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The largest respirable particle is
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A worker wearing a respirator with
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The term solubility or transportabi
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Which is the major factor in consid
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The most important types of environ
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The fraction of unattached radon de
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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
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A worker accidentally ingested one
Page 503 and 504:
Conjunctivitis may result from a we
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Eventually, charged particles give
Page 507 and 508:
Gamma rays get their energy from: A
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What is the usual unit of measureme
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Normal background radiation exposur
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Plutonium, taken into the circulato
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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
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Radioactive decay is said to be fir
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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
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What is elastic scattering of a pho
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What is the "photoelectric effect"
Page 569 and 570:
What happens to the incident photon
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Which effect predominates in the 10
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What effect predominates in the gre
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What is the SI unit of activity? A)
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The equivalent energy for the rest
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Which of the following is isobaric
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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?
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The periodic table lists: A) All el
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A radionuclide that is constantly b
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The target organ for consideration
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If Kr-90 is released from the stack
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In a radioactive decay process in w
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In a radioactive decay process in w
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A build-up factor equal to one in a
Page 603 and 604:
Radiation in the visible spectrum t
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The energy distribution of alpha em
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Radium is considered to be a ______
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A proportional counter has enough v
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A Geiger counter should never have
Page 613 and 614:
Proportional counters have gas ampl
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The primary function of a radiation
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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
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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
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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
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What is a disadvantage of a long sa
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Given a reading of 100 mr/hr (gamma
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Which of the following is not a nat
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The occupational derived air concen
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What does an "alpha" emission consi
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A radium decay scheme is represente
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In the beta particle decay of stron
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What is a Roentgen? A) The amount o
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Why are the low atomic number mater
Page 681 and 682:
The TLV for exposure to radiation f
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Which of the following series is an
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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
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The difference between x-rays and g
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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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Which of the following radionuclide
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Most of the dose received by man fr
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For an isotope having an allowed co
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All of the following statements abo
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Isotopes are: A) different radionuc
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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
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Which of the following radionuclide
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
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An isotope is one of two or more at
Page 735 and 736:
The symbols Pa, Ga, Sn, Ni represen
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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
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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
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The roentgen is equal to: A) 1.0 co
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Cancer induced by radon daughters i
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Unlike many man made materials, whe
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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
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Uranium and Thorium decay products
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The relationship between the mass o
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The NRC defines a hot particle as a
Page 781 and 782:
Uptake and retention of a radionucl
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An active person who eats a high fi
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Cesium-137 decays by emitting: A) t
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A mole of U-238 weighs: A) 238 amu
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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
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A radionuclide with a parent half-l
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As an alpha particle transverses a
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The average energy of a positron em
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The stopping power for electrons __
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Kerma is the sum of the initial kin
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The term used to describe a process
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Rn-220 is a member of which of the
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Which of the following naturally oc
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An absorbed dose of 3 rad results i
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Which of the following is equivalen
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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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