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TEST BORRADO, QUIZÁS LE INTERESE: 3 Radiation Safety

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Título del Test: 3 Radiation Safety Descripción: 3 Radiation Safety Autor: amaleon24 OTROS TESTS DEL AUTOR Fecha de Creación: 06/10/2024 Categoría: Ocio Número Preguntas: 43

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1) Which of the following bodies regulates transportation of radiopharmaceuticals? a. NRC b. DOT c. JCAH d. FDA. 2) Which of the following bodies regulates the use of investigational pharmaceuticals? a. NRC b. DOT c. IRB d. FDA. 3) In the event of a spill of 99mTc to clothes, one should immediately: a. enter a shower fully clothed b. remove and store the clothes until they decay to background c. wash the clothes in hot water and then survey them to determine remaining activity d. remove and destroy the clothing. 4) If a radiopharmaceutical is spilled on the floor, the first priority is to: a. contact the Radiation Safety Officer b. pour a chelating solution over the area of the spill c. cover the area with absorbent paper and restrict access around it d. call the housekeeping department to arrange for cleaning. 5) The inverse square law, in words, says: a. if you double the distance from the source of activity, you reduce exposure to 25% of the original intensity b. if you double the distance from the source of activity, you decrease exposure by 25% c. if you halve the distance from the source of activity, you decrease exposure to 25% of the original intensity d. if you halve the distance from the source of activity, you decrease exposure to one fourth of the original intensity. 6) What is the best way to decrease the radioactive dose to visitors if a patient is surveyed to emit 3 mR/hr at bedside? a. have the patient wear lead aprons b. keep the patient well hydrated and encourage frequent voiding c. have the visitor sit or stand as far as possible from bedside d. have the visitor wear lead shielding. 7) Which of the following isotopes would be effectively shielded by a plastic syringe? a. 67Ga b. 89Sr c. 99mTc d. 81mKr e. 133Xe. 8) What is the NRC annual dose limit allowed to the lens of the eye? a. 1.5 mrem b. 15 rem c. 50 rem d. 5 rem. 9) Which of the following should be used when administering an intravenous pharmaceutical to a patient? a. lead syringe shield b. leaded eyeglasses c. gloves d. all of the above e. a and b only. 10) Which of the following is the most effective means of measuring low levels of removable radiation? a. by performing an area survey b. by performing a wipe test c. with a pocket dosimeter d. with a TLD. 11) What is the dose rate limit at the package surface for a shipment of radioactive material bearing a Yellow-III label? a. 200 mR/hr b. 50 mR/hr c. 200 rads d. 200 mrem. 12) Which of the following measures absorbed doses? a. millicurie b. becquerel c. gray d. all of the above. 13) If the dose rate at 3 meters from a radioactive source is 100 mrem/hr,what will the dose rate be at 6 meters? a. 25 mR/hr b. 50 mR/hr c. 75 mR/hr d. 12.5 mR/hr. 14) The philosophy of the ALARA program is to keep the radiation dose: a. as low as recently authorized b. as long as reasonably attained c. as long as reasonably acceptable d. as low as reasonably achievable. 15) All of the following are critical factors in keeping radiation exposure to a minimum except: a. time spent near the a radioactive source b. geometry of the container holding the source of radiation c. distance from the source of radiation d. shielding of the radioactive source. 16) Gaseous radiopharmaceuticals may only be used in rooms that: a. have at least one window b. contain an oxygen supply c. are at a positive pressure compared to surrounding rooms d. are at a negative pressure compared to surrounding rooms. 17) If the exposure rate at 4 meters from a radioactive source is 5 mR/hr,what will the exposure rate be at 3 meters? a. 2.8 mR/hr b. 6.5 mR/hr c. 7.4 mR/hr d. 8.9 mR/hr. 18) If the exposure rate at 10 meters from a radioactive source is 15 mR/hr,what will the exposure rate be at 25 meters? a. 2.4 mR/hr b. 6 mR/hr c. 3 mR/hr d. 10 mR/hr. 19) A spill of 99mTc increases the exposure rate in a room from 1.7 mR/hr to 3.15 mR/hr. The room is posted with a sign reading “Caution-Radioactive Materials”. What would be the ideal solution? a. change the sign to one reading “Caution-Radiation Area” b. call the NRC c. decontaminate the floor with water and cleanser d. place absorbent paper over the spill and close the room until the activity has decayed. 20) A technologist has 500 mrem registered on his ring badge in one month. What should be done to decrease exposure in the future? a. use lead pigs and syringe shields when preparing radiopharmaceuticals b. have another technologist elute the generator c. wear lead aprons d. all of the above a. use lead pigs and syringe shields when preparing radiopharmaceuticals b. have another technologist elute the generator c. wear lead aprons d. all of the above. 21) OSHA requires that personnel exposure records be provided to employees: a. monthly b. quarterly c. annually d. biannually. 22) A room containing a 57Co sheet source is posted with a sign reading “Caution-Radioactive Materials”. The exposure rate measured next to the source is 5.2 mR/hr. What should be done? a. change the sign to one reading “Caution-Radiation Area” b. store the source in a leaded container c. monitor the length of time a technologist can work near the source d. none of the above. 23) A technologist discovers that a patient in the room next to a radioiodine therapy will receive 2.5 mrem/hr when lying in his bed which is against the shared wall. What should be done? a. move the bed to the other side of the room b. discharge the therapy patient c. discharge the non therapy patient d. calculate how long visitors to the non therapy patient can stay e. calculate how long the patient may stay in bed each hour. 24) If 99mTc gives an exposure rate of 0.78 R/hr from 1 mCi at 1 cm, and a technologist sits 1 meter from a patient who was injected with 22 mCi,what dose equivalent will he or she absorb in 20 minutes? a. 0.75 mrem b. 1.7 mR/hr c. 3.0 R d. 0.6 mrem e. 2.6 mrem/hr. 25) What is the dose rate limit at the surface of a package bearing a DOT Class I White label? a. 0.5 mR/hr b. 2 mR/hr c. 50 mR/hr d. 100 mR/hr e. 200 mR/hr. 26) A Type A package bears a DOT Class II Yellow Radioactive label, has a transport index of 0.8, and contains 10 mCi of 111In oxine. What is the exposure rate at 3 feet from the package? a. 0.4 mR/hr b. 0.8 mR/hr c. 1.0 mR/hr d. 7 mR/hr e. cannot be determined from the information given. 27) The doorway to the Nuclear Medicine reception area should be posted with: a. Caution: Radiation Area b. Caution: High Radiation Area c. Grave Danger:Very High Radiation Area d. Caution: Radioactive Materials e. none of the above. 28) Which of the following steps would not decrease a technologist’s chances of internal exposure to radiation? a. wearing gloves during injection of radiopharmaceuticals b. using tongs to transfer a vial from a lead shield to a dose calibrator c. working under a fume hood when working with volatile liquids and radioactive gases d. refraining from smoking and eating in the “hot lab”. 29) Tools for measuring personal exposure to radiation include all of the following except: a. thermoluminescent dosimeter b. pocket ionization chamber c. film badge d. Geiger-Mueller Counter. 30) Which of the following must be done during disposal of a carton in which a shipment of 131I was received? a. RSO must be notified b. carton must be stored for 10 half lives before disposal c. radioactive labels must be removed or obliterated d. carton must be discarded with biohazardous waste e. b and c. 31) If the lead HVL for 99mTc is 2.6 mm, and a lead shield containing 99mTc eluate is 13 mm thick,what will the exposure rate be from the shielded vial if the unshielded vial had a rate of 100 mR/hr? a. 1.6 mR/hr b. 3.1 mR/hr c. 6.3 mR/hr d. 12.5 mR/hr. 32) Reports of area surveys must include all of the following except: a. a diagram of the areas surveyed b. equipment that was used to perform the survey c. date performed d. initials of the person who performed the survey e. list of isotopes used in the area. 33) A technologist is working in a hot lab where the exposure rate is 20 mR/hr. What sign should be on the door? a. Caution: Radioactive Materials b. Caution: Radiation Area c. Caution: High Radiation Area d. Grave Danger:Very High Radiation Area e. none of the above. 34) If a technologist sits two feet away from a generator and the dose rate at his chair is 15 mrem/hr,what will the dose rate be if he moves his chair 4 feet from the generator? a. 2.5 mrem/hr b. 3.75 mrem/hr c. 7.5 mrem/hr d. 60 mrem/hr. 35) A misadministration must be: a. reported within a week to the RSO b. reported to the NRC within 15 days after discovery c. reported to the referring physician within 24 hours d. recorded and the records kept for 5 years e. all of the above except a. 36) Which of the following is not a misadministration? a. when a dose of 400 μCi of 99mTc MAA is given rather than 4 mCi b. when the correct dose of 111In oxine for cisternogram is injected intravenously c. when a patient who should have been injected with 20 mCi of 99mTc HDP for a bone scan receives a capsule containing 250 μCi of 123I intended for a thyroid patient d. when a patient who should have received 50 mCi of 131I receives 35 mCi instead e. none of the above. 37) Which of the following must be kept for 5 years? a. records of misadministrations b. records of dose calibrator linearity c. records of doses assayed before administration d. area survey records e. records of instructions to breast feeding women who received radiopharmaceuticals. 38) Records of 99Mo breakthrough in 99mTc eluate must be kept for: a. one year b. three years c. five years d. 10 years e. until license expires. 39) A pregnant technologist receives 350 mrem during her pregnancy according to a film badge worn at waist level. Has the NRC dose limit for the fetus been exceeded? a. yes b. no. 40) What is the best choice for disposal of a vial containing 27 mCi of 99mTc in 2 ml of liquid? a. transfer to an authorized recipient b. incinerate c. bury d. store until decayed to background e. release to the atmosphere through evaporation. 41) Which of the following materials is sufficient for shielding a therapeutic dose of 90 Y ibritumomab tiuxetan? a. lucite b. tungsten c. lead d. none of the above. 42) What length of time should a lactating female who undergoes 18FDG-PET scanning wait before resuming breast feeding? a. 4 hours b. 24 hours c. one week d. breastfeeding should be discontinued. 43) Any patient who is treated with 90 Y ibritumomab tiuxetan must be hospitalized for at least 24 hours. a. True b. False.

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