MODULE3 RADT117 EXAM

MODULE3 RADT117 EXAM .

The exposure rate to a body 3 feet from a source of radiation is 16 R/hour.
What distance from the source would be necessary to decrease the exposure
to 6 R/hour?
5 feet
7 feet
10 feet
14 feet - CorreCt Answers -5 feet


At a distance of 100 cm the intensity of radiation per unit area is 900mR
per sec. What will the intensity be if the unit area is moved to a distance of
300 cm from the point source of the radiant energy?
100 mR
300 mR
2.7 R
8.1 R - CorreCt Answers -100mR


If the exposure rate to a radiographer positioned 3 feet from a radiation
source is 8 mR/min, what will be the dose to the radiographer at a distance
of 6 feet from the source?
1 mR/min
2 mR/min
16 mR/min
32 mR/min - CorreCt Answers -2mR/min

, The exposure from an x-ray tube is 45 mR at a 72-inch SID. What will the
exposure be if the tube is moved to 40-inch SID?
237 mR
146 mR
131 mR
23 mR - CorreCt Answers -146mR


A radiographer receives 20 mR standing 2 feet from the x-ray source. What
will the radiographer exposure measure if they move to 4 feet from the
source?
0.625 mR
1.25 mR
5 mR
10 mR - CorreCt Answers -5 mR


Radiographer A receives 5 mr per second of scatter radiation standing 3
feet from the patient. What rate of radiation does Radiographer B receive
standing 7 feet away?
2.14 mr/sec
1.12 mr/sec
27.2 mr/sec
0.92 mr/sec - CorreCt Answers -.92 mR/sec


If the radiation dose to a patient was 8 mR at a 180 cm distance from the x-
ray tube, what would the dose be if the distance were reduced to 100 cm?
2.47 mR