nas The atoms that have excess energy and are unstable are knO™’ a Laser b. Radiation . Electromagnetic waves © Radioactive ervctions ( Written emergency procedures are in place to handle specific '"* radiation boundaries. 1) tical b. False gays) under ide You make 120 minutes exposure every day for 1 week (5 working 99". ig 72 MSW. Conditions. The dose rate at your location during each of these &XP° a would your total dose be at the end of the week? p= oex% @ 720msv as b. 690msv Ww V od ¢. 680 mSv vs d. 740 msv ‘An Ir-192 source was last assayed on March 1 with an activity of 160 CU! of the source on July 28 of the same year? ries. What is the activity a. 160i b. 20Ci < 80¢i @ 4c Which of the following detects, measures, or in some way records ionizing radiation? a. TLD b. Pocket Dosimeter c. Rate Alarm @ Allof the above The safety of source being transported from storage to a field location is the sole responsibility of the : © Radiographer b. RPO c. The manager of the company d. Job supervisor If the source to film distance increased from 5 factor of a. 2.67 ® 289 c. 2.41 d. 2.52 30 40 85 cm, the exposure time increases bya8. The field at 3.5 m from tr-192 source was measured as 7 Gy/hr, what distance could you 2PProach before the field will be 28 Gy/hr? 2D 1.75m b. 150m © 125m 4. 2.00m 8: When the radioactive source is in its shielded postion inside the radiographic projector, the dose at the surface and one meter from the surface should not exceed the following: 2. 2 mSv/hr and 0.01 mSv/hr respectively. ® 2msv/hrand 100 hSv/hr respectively © 20 Rem and 1 Rem respectively d. 200 uSv/hr and 10 pSv/hr respectively 10. The maximum dose limit to extremities (forearms, hand or feet) for industrial radiographers is 150 msv/year. a True () False 14. Your cobalt source of 22570 MBq is exposed for one single 30-min exposure. This is the only exposure that will be made that day. Assume gamma factor of 0.351 uSv/MBq.hr. standing at 22.58 m, what will your total dose be? a 6.8 uSv b. 17.48 sv 15.53 usv D 7.77 sv 12. A cobalt source has decayed from its original activity after 3 half-lives. Originally it was 2738 Ci Its current activity is: a. 382.55 Ci b. 328.25¢i cc. 368.35 Ci @ 342.25Ci 13. The maximum permissible speed f6r vehicular of radiographic equipment or shi 90 Km/hr or the posted speed limit whichever is higher. a. True © False 14, Providing the necessary personnel monitoring and protection measures prior to allow an employee to be exposed to ionizing radiation is the responsibility of: a. The secretary of the company b. The radiographer © Radiation protection officer of the user dd. The manager of the user company 15. During radiographic operations, the radiographer or his assistant do not need to maintain direct surveillance of the operation as long as the area is barricaded with ropes and radiation warning signs: a. True ® False ping package isyries remain many © w 16. A radiographer source of wo Dher source of iridium.192 wi yurce strength oft after 150 days? es nati a 36.5c b 295c) © 335c 7 @ wsa cee The first operational ch 7 eck to be . ae cua be performed on a survey rm b. Calibrations date oO Battery d. Scale 18. Gamma radiation can cause damage to skin, bone marrow, and internal rans: @ True : b. False 19. The assurance about the right operation of the radiation survey meters the responsibility of Radiation Protection Officer of the user: @ Tue b. False 20. The HVL of lead to control leakage from an X-ray tube operating at 200 Kv is 10.9 m thickness of lead would be required to reduce this leakage by a factor of 16? 3. 459mm and their calibration iS m. what ® 436mm ¢, 463mm d. 41.7mm 21. Your survey meter reads 152 pSv/hr. how much radiation would you receive if you stood at the location for 25 minutes? @ 63.33 usv b. 58.29 uSv 76.64 uSv d. 69.48 Sv 22. While performing radiography job, radiographer should keep the survey meter next to the radiographic projector inorder to observe if the Source retuned tothe shielded position after exposure. a. Tre (0) False 23, During industrial radiography conducting t 2J00 Ste the controled area bong exceed 7.5 uSv/hr. lary shall not (2) Tue b. False. 24. The time required for one half of the amo material is called half-time. a True 0) False unt of unstable m, “eral degrade into a more stableat periods not exceed d 25. 11D badges worn by workers in industrial radiography must be replace @ ® Three months b. Four months One months 4. Two month: s storag! 26. The dose rate at the surface and one meter from the vehicle radioactive Used for industrial radiography device(s) shall not exceed: 0.05 mSv/hr and 100 ySv/hr respectively. b. 5 mRem/hr and 10 pSv/hr respectively. (© 500 psv/hr and 10 usv/hr respectively. d. 50 uSv/hr and 0.1 mSv/hr respectively 27. The principle gamma ray energies emitted by cobalt 60 are: a. 1,06 and 2.91 Mev. b. 1.35 and 2.21 Mev. ¢. 1.05 and 1.66 Mev. @) 1.17 and 1.33 Mev. 28. Given 160 GBq of Co-60 what amount of the time elapsed before it is only 40 GBq, e compartment a, 5.3 years b. 15.9 years c. years @ 106 years 29. Your survey meter has become inoperable. You must: (2) Follow company operating and emergency procedures. b. Continue working and replace inoperable survey meter later. c. Replace the radiography machine. d. None of the above. 30. What area(s) require posting to alert individuals to the presence of radiation? a. Supervised areas (D Controlled areas ¢. Both supervised and controlled area d. None of the above. 31. Survey meters are designed to measure: ) the radiation dose rate in the area b. the radiation dose half life c. personal radiation dose levels d. all of the above. 32. The maximum dose level for an alarm ratemeter use in industrial radiography is 2 mSv/hr. True br False 33. Any operational test of the survey meter shall be performed: (® Each day prior to use b. Two days prior to use cc. Three days prior to use d. None of the aboveeater than tue BF urn ava 4. Aleak test would be Considered passed should the sample tested ret™ SuCi a True riod b) False era 24 hour Pel ov 25 Avtose of 175 usv over a 1 Year period is less damaging than 175 HS” True b. False 36. Exposure to Xray and gamma ray 3. Will have no effect on human beings b. Will be beneficial © May have a cumu 4. Will have only a st 37.4 radiation area is def could be 2.5 usv/hr. since they build up immunity to radiation poisonin& lative effect which must be considered. hort term effect on human tissues lic, in which the dose rate fined as “an area inaccessible to the general public, a. True ee b) False what 38. 2 HVL of lead to contro! leakage from an X-ray tube operating at 200 Kv is 40° mm. thickness of lead would be required to reduce this leakage by a factor of 16? @ 16mm b. 8mm c. 12mm d. 4mm respectively. @ True b. False 40. Working in area where the radiation dose rate is 80.86 USv/h, ifthe job took 5 hours and 24 minutes to be completed, what is the radiation dose Ou will receive in msy a. 4.37 b. 43.7 c. 0.0437 @ 0.437 41. Using the ICRP recommended whole body dose eee Whats the dose pal worker will be exposed to in a day working 8 hour: 4 88 per Week ang my padi year? a, 1.25 mSv/day b. 12.5 mSv/day (0.125 msv/day d. 125 mSv/day see 42. Radioactive sources used for radiography months. G@ True b. False k tested a ery; to exceed be leak t tint Als not. Xceed 12a one hour exposure. What dose 43. If you received a dose of 46 mSv from Ir-192 source during a one hour exposur a) would you have received if your distance from the source increased by a 3 times for time? a. 17.7 msv b. 14.1 msv 19.5 msv @ 15.3 msv 6 44. You are required to work in area where the radiation dose rate is 126 mSv/h. if the job took 2 hours and 40 minutes to be completed, what is the radiation dose you will receive a. 960 msv W 240 msv © 820msv d. 768 msv 45. The general public is not expected to receive more than 0.5 mSv in a year from external radiation in any unrestricted area. a. True @® False 46. The principle gamma ray energies emitted by cobalt 60 are 1.17 and 1.33 MeV. (a. True b. False 47. The field at 3.5 m from an Ir-192 source was measured as 7 Gy/h, what distance could you approach before the field will be 66 Gy/h? @ 114m b. 162m c. 138m d. 125m 48. You are required to work in area where the radiation dose rate is 93 uSv/h, if the job took 4 hr and 12 min to be completed, what is the radiation dose you will receive? a. 39.06 mSv Xb) 0.3906 msv c. 0.3906 Sv d. 3.906 mSv 49. When the distance from the source of radiation is doubled, the amount of radiation received will be: a. Tripled @ Reduced by % ¢. Doubled d. Reduced by % 50. Your survey meter reads 149 mSv/h. How much radiation would you receive if you stood at that location for 12 minutes and 30 seconds? a. 29.42 mSv {© 31.04 msv Cc. 32.98 mSv d. 36.36 msyd atleast : must'be calibrates 51. Pocket dosimeter and rate alarms used for industrial radiograph¥ every twelve months W True b. False fn shall be calibrated within 52. All radiation survey meter approved for use in industrial radiogrPhY ‘ and shall have a oc. affixed 10 it a. Twelve months, calibration agency b. Twelve months, calibration label (©) Six months, calibration label 4. Twenty four months, calibration label ice of 64m? 53. You are using 40 G8q of cobalt 60, what is your radiation dose at distam a. 3.40 mSv/h (2 3.40 psv/h 340 Sv/h d. 340 usv/h , i 54. A Co-60 source was last assayed on January 2001 with an activity of 20 curies, what is the activity of the source in April 2006? a. 13.5Ci ® 1w0c c 20.0Ci d. 12.5Ci 55. In making an isotope exposure in an unshielded area, you find the dose rate at 6 m from the source is 3920 mSv/hr. What would be the dose rate at 24 m? {® 245 msv/h b. 224mSv/h c. 204 mSv/h d. 285 mSv/h 56. Making 3 exposures at 80 seconds each and at a distance of 4 m. How much dose you will receive if the dose rate at the same distance will be 186 mSv/h? a. 1240 msv b. 1.240 msv © 12.40msv d, 0.1240 Sv 57. The acronym for ALARA is As Low As Reachable Achievable, a. True @, False 58. After three half-lives have elapsed, what will be the strength of a gamma source relative to its original strength? a. 25% b. 33% c 11% D 125%be exposed to ata distance 59. Working with 740 GBq of Ir-192. How much radiation will a worker be exP! of 1.77 m2. {30.71 msv/h b. 3071 msv/h G1) msu/n 3.071 msv/h d. 0.3071 mSv/h it is 3.5 ; a certain point wa: 60. Cobalt 60 source is used in radiography operation. The radiation ee a eee mSv/h. How much shielding of concrete is required to reduce the level to + Concrete HVL of 0.87 inches a. 7.97cm (&) 6.86 cm €. 8.23.cm d. 5.28.cm 61. The working team with a radioactive source of Co-60 is 2 @) True b. False 62. Assume 7.83 mm of steel 1 half value layer, and you have a total of 3 half value layers of steel between you and 137 mSv/h. what would your dose rate be? a. 20.57 mSv/h b. 18.95 mSv/h €. 16.25 mSv/h (@ 17.31 msv/h 63. The strength of a source is called: a. Refraction b. Curies © Activity d. Sequence radiation 64. Transport index (Tl) is determined by: a. Calling the source manufacturer ) Surveying the transport package c. Checking the decay chart d. Checking the ID tag on the camera. 65. When the radioactive source is in its shielded position inside the radiographic projector, the dose at the surface and one meter from the surface should not exceed 2 mSv/h and 100 uSv/h respectively @ True b. False, 66. Ir-190 source of 1768 GBq is used with a gamma factor of 0.13 USv/MBq.h. at what distance a radiographer will receive radiation 5 mSv/h? a. 5.73m b. 6.13m © 673m d. 603m e°ust have allof the 67. Vehicle used for transporting sources from storage to field location following except a. Emergency contact information Xb) Radiation projector log ©. Vehicle placard 4. Radiation survey meter. and you're showing 68. You have 30 exposures to make. Your shot time is 4 min per exposure $5 uSv/h. what will be your total dose at the end of the shift? @ v0 usv b. 124 psv ce. 138 usv a. 99 usv 69. Assume 5.83 mm of lead 1 half value layer, and you have a total of 4 half value layers oflead between you and 161 mSv/h. what would your dose rate be? a. 13.98 mSv/h 2 10.06 msv/n ©. 12.48 mSv/h d. 11.66 mSv/h 70. if the radiographer has 400 mSv/h at 5.93 m, the exposure rate at 38.08 m would be ~- With 1 half-value of shielding between the radiographer and the source. en Angwer sreidbe G37 mSv/h- c. 11.93 mSv/h d. 8.22 mSv/h 71, Survey meters are designed to measure the radiation dose rate in the area. D True b. False 72. Exposure rate of 12 mSv/h was measured just outside the lead door to a radiography room. The half value layer in lead for the transmitted x-rays is 2.07 em. what thickness of lead would have to be added to the door to reduce the exposure rate to 4 mSv/h? a. 5.19cm b. 4.28cm © 3.28em d. 6.42cm 73. A radioactive Yellow Ill warning label is applied to Packages with trang, and 10. @® True b. False 74. A shipping container is surveyed and found to be 30 HSV/h at 1m, Radioactive yet) would be required, ooo a. True D False "Port index of between 1Hiati nce with dose rate of 50 mSv/h at 30.48 m from the source. Moving to Pa radiation source 75. You hav d 3.05 m would increase your dose rate by a factor of what a. 169 6 10 @ Q 100 4. 64 2 e aphy is 2 mSv/h, 76. The minimum dose level for an alarm rate meter use in industrial radiography ' a True () False ctivity is 77. The label on the radiographic projector must state the date for which the radioactivity estimated radiation levels: 4. Inside the transporti b. Outside the guide tube ©) Outside the transporting container d, Outside the exit point of the source ; 78. A cobalt source has decayed from its original activity after 3 half-lives, Originally it was 1582 GBq. Its activity now is: a. 169.75 GBq ® 197.75 GBq c. 148.75 GBq d. 225.25 GBq 79. The radioactive container that is designed to survive normal transportation, normal handling is type B container @ te b. False 80. A radiation survey meter measured a dose rate of 32 mSv/h from a source at 1 meter. What is the dose rate at a distance of 97.71 meter in pSv/h? container a 33.5 b, 335 ( 3.35 d. 0,335 81, What does a collimator do? a. Itreduces the exposure time by ionizing the radiation before it hits the film 6. Itholds the film in place during an exposure © tt provides shielding from radiation d. Allof the above 82, The manager is not responsible for checking radiographic projectors prior to each job, @) True b. False 83. A radioactive Yellow Ill warning label is applied to packages with transport index of: a. Between 10 and 100 b. 0 Cc. Between 0 and 1 @) Between 1 and 10ue of return ava 84. A leak test would be considered failed should the sample tested a Sui , vet (0.005 pei ~ fF A Cm ©. 0.05 ci ei pee din a container called is carrie 85. Radioisotope such as Ir-192 is used in industrial radiography and is a. Vault b. Safe © Projector d. Overpack indication lights and warning 86. The radiographer shall perform visual and operability checks of indication lie signs: (@) Before use on each day the equipment is to be used b. After each week the equipment has been used c. After the end of the shift d. Before each week the equipment is to be used 87. Two sources (A and 8) of Co-60 are prepared on the same day. Source A has a mass of 5 grams while Source B has a mass of 10 grams. Choose the right answer about their half-lives: a. Half-life of source A will be greater b. Half-life of source B will be greater (©) Both sources have the same half-life d. None of the above 88. The technician should always use a film badge to verify the radiation level. a. True ®) False 89. What are the three classifications of exposure devices 7 a. Mobile, Rigid and Fixed : b. Portable, Mobile and Fixed —te coRescy 7 c._ Fixed, Rigid and Mobile @ Portable, Rigid and Fixed 90. To penetrate a thicker or denser material, you Would need a source with: a, Same penetration b. Less penetration © More penetration d. None of the above 91. Ir-192 source with 10 Ci produces a dose rate of 7606 msy, That will 100 Ci produce at the same distance? 0.3 meters, how many mSv/h a. 760600 b. 7606 © 76060 d. 760.60Cars ied to a package containing radioactive materials. The i ring label is appli 92 ‘ fadtoacive veer package is 1, The yellow labelling and the dose rate at one meter are ransport index respectively as follows: yellow II label, 10 pSv/h. (a) True b. False | “ 93. Radiation dose at a distance of 3 meters from Co-60 source in 2 hrs is 6 mSv. What is the radiation dose at a distance of 4.0 m for 4 hrs? a. 5.33 mSv ©). 6.75 msv c. 7.05 mSv d. 7.23 mSv 94. What is used to visually indicate the type of hazard contained in a package? a, Audible alarms 4 (©) Labels qe pe: —~c. Placards - All of the above 95. You have an Ir-192 source whose strength was 11.3 TBq on July 1%, approximately what will be its strength on September 13"? a. 4.907Bq b. 4.75 1Bq c. 4.25 78q @) 5.50 Tbq U