RT Level II Final Exam 2023 Complete Questions and Answers
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Course
RT Level II
Institution
RT Level II
RT Level II Final Exam 2023 Complete Questions and Answers
Low voltage x ray tubes are generally fitted with windows made of:
A) plastic
B) beryllium
C) glass
D) lead *ANS* B) beryllium
If it were necessary to radiograph a 7 inch thick steel product, which of the following gamma ray sou...
RT Level II Final Exam 2023 Complete Questions and Answers Low voltage x ray tubes are generally fitted with windows made of: A) plastic B) beryllium C) glass D) lead * ANS* B) beryllium If it were necessary to radiograph a 7 inch thick steel product, which of the following gamma ray sources would most likely be used: A) cobalt -60 B) thulium - 170 C) iridium - 192 D) cesium -137 * ANS* A) Cobalt -60 Cobalt -60 gamma ray source has an approxima te practical thickness limit of: A) 2 1/2 inches of steel or its equivalent B) 4 inches of steel or its equivalent C) 9 inches of steel or its equivalent D) 11 inches of steel or its equivalent * ANS* C) 9 inches of steel or its equivalent The absorptio n of gamma rays from a given source when passing through matter depends on: A) the atomic number, density, and thickness of the matter B) the Young's modulus value of the matter C) the Poisson's ratio value of the matter D) the specific activity value of the source * ANS* A) the atomic number, density, and thickness of the matter The fact that gases, when bombarded by radiation, ionize and become electrical conductors make them useful in: A) X -ray transformers B) X -ray tubes C) masks D) radiation detection equipment * ANS* D) radiation detection equipment The uneven distribution of developed grains within the emulsion of a processes x -ray film causes the subjective impression of: A) graininess B) streaks C) spots D) white scum *ANS* A) graininess Of the following, the source providing the most penetrating radiation is: A) cobal t-60 B) 220 kVp X -ray tube C) 15 MeV X -ray betatron D) electrons from iridium -192 * ANS* C) 15 MeV X -ray betatron The gamma -ray intensity at one foot from a one curie source of radioactive cobalt -60 is nearest: A) 15 roentgens per hour B) 1,000 roentgens per hour C) 1 roentgens per minute D) 10 milliroentgens per day * ANS* A) 15 roentgens per hour The specific activity of an isotopic source is usually measured in: A) million electron volts B) curies per gram
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