NRRPT Study Questions, *10 CFR 20, Effects of Radiation Exposure, NRC 10 CFR 20 AND 35 All Questions With Correct And Verified Answers

NRRPT Study Questions, *10 CFR 20, Effects of Radiation Exposure, NRC 10 CFR 20 AND 35 All Questions With Correct And Verified Answers .Average energy of a positron emitted during positron decay? - Answer-4/10 or 0.4 of the maximum energy. .1 WLM = ? - Answer-1 rem CEDE .Radiation exposure to miners is regulated by? - Answer-30 CFR .Maximum dose allowed to miners is? - Answer-4 WLM per year .A geiger counter has enough voltage to cause? - Answer-Secondary electrons with a long range avalanche .What type of decay "competes" with positron decay? - Answer-Electron capture .A gas-filled detector is collecting 100% of the ion pairs produced. It is said to be operating in what region? - Answer-Ionization .Which laser wavelength is considered a retina hazard for safety purposes? - Answer-400 to 1400 nm .To achieve secular equilibrium, which of the following conditions must be met? - Answer-Parent half-life >>> Daughter half-life .What is the limit for external surface contamination on a DOT package? - Answer-22 dpm/cm^2 .The threshold limit value (TLV) for exposure to radiation from a microwave oven is? - Answer-10 mW/cm^2 .Tissue dose from thermal neutrons occurs principally as a result of? - Answer-(n, gamma) reactions with hydrogen and (n,p) reactions with nitrogen .What are the value(s) for gas amplification factors in ionization chambers? - Answer-Equal to 1 .What is the clearance time for a particulate traveling through the trachea? - Answer-0.1 hour .What is the clearance time for a particulate traveling through the bronchi? - Answer-1.0 hour .What is the clearance time for a particulate traveling through the bronchioles? - Answer-4.0 hours .What is the clearance time for a particulate traveling through the alveoli? - Answer-10 to 1500+ days .In a semi-infinite cloud of gamma-emitting noble gasses, the gamma contribution to the absorbed dose rate can be estimated as? - Answer-D = 0.25EX ; D = rads/sec or rem/sec, E = gamma energy (MeV) * yield , X = concentration (uCi/cc) .What are the 4 major types of cells in circulating blood? - Answer-Erythrocytes, Lymphocytes, Granulocytes, Platelets .What are the purpose of erythrocytes? - Answer-Oxygen transport to the cells .What are the purpose of lymphocytes? - Answer-Generate antibodies to fight infection .What are the purpose of granulocytes? - Answer-Fight infection by phagocytosis .What are the purpose of platelets? - Answer-Blood clotting agent and vessel integrity .How do you calculate RBE? - Answer-Dose of 250 kVp x-Rays / Dose of other radiation .What is the current value for LD50/60 in humans? - Answer-410 rem whole body with no medical intervention .At what exposure level does Gastrointestinal Syndrome start? - Answer-1000 rem .At what exposure level does Cerebrovascular Syndrome start? - Answer-5000 rem .What level of exposure produces temporary sterility? - Answer-250 rem .What level of exposure produces permanent sterility? - Answer-500 rem .What are the 3 categories of somatic (late) effects of radiation? - Answer-Life shortening, leukemia, and other cancers. .What was the result of the BEIR V committee? - Answer-"Health Effects of Exposure to Low Levels of Ionizing Radiation" .What is the protection factor (PF) for a full-face, negative-pressure, SCBA? - Answer-Negative Pressure - 50 .What is the protection factor (PF) for a full-face, pressure-demand (positive pressure), SCBA? - Answer-Positive Pressure - 10,000 .What is the protection factor (PF) for a full-face, demand (negative pressure during inhalation), air-line respirator? - Answer-Demand - 100 .What is the protection factor (PF) for a full-face, continuous-flow, air-line respirator? - Answer-Continuous Flow - 1,000 .What is the protection factor (PF) for a half-mask, demand (negative pressure during inhalation), air-line respirator? - Answer-Demand - 10 .What is the protection factor (PF) for a half-mask, continuous-flow, air-line respirator? - Answer-Continuous Flow-50 .What is the protection factor (PF) for a half-mask, negative pressure, air-purifying respirator? - Answer-Half-Mask-10 .What is the protection factor (PF) for a full-face, negative pressure, air-purifying respirator? - Answer-Full Face-100 .What is the protection factor (PF) for a supplied air hood respirator? - Answer-1,000 .Protective actions for nuclear accidents are grouped into which three time phases? - Answer-Early, Intermediate, and Recovery .The electron volt is a unit of energy equal to what? - Answer-1.6E-19 Joules, 1.6 x 10^-19 Joules .During the "early" phase of an accident, what effective dose equivalent should the limit be set at for emergency responders? - Answer-5 rem / 50 mSv .How do you increase X-Ray counts in a scintillation crystal? - Answer-Thinning the crystal .Federal regulations governing licensing and radiation safety for industrial radiographic operations can be found where? - Answer-10 CFR 34 .What agency approves the design of respiratory protection devices? - Answer-NIOSH .What is the quality factor for a thermal neutron? - Answer-2 .What regulation covers quality factors? - Answer-10 CFR 20 .What is the FWHM value for a Cs-137 photopeak on a NaI system? - Answer-50 keV .The "source" of the majority of radon in the environment is generally from which of the following decay series? - Answer-Uranium .How does Cs-137 decay? - Answer-By emitting beta particles of two different energies. 0.51 MeV (95%) 1.17 MeV (5%) .One RAD is equal to what? - Answer-100 ergs/gram .What is the term used to describe a process in which a number of fragments are emitted from an excited nucleus? - Answer-Spallation It literally means to "break apart". .When must a yellow II label be applied to a shipment? - Answer-When surface radiation levels are greater than 50 mrem/hr or a TI greater than 1.0. .What is covered by 10 CFR 19? - Answer-Notices, Instructions, Reports to Workers .What is covered by 10 CFR 20? - Answer-Standards for Protection Against Radiation .What is covered by 10 CFR 30? - Answer-Licensing of By-Product Material .What is covered by 10 CFR 35? - Answer-Medical Use of By-Product Material .How many disintegrations are in 1 curie? - Answer-3.7E10 dps