CAMRT EXAM 2025 QUESTIONS
AND ANSWERS
How far away must the operator stand from the xray tube if not covered with lead? -
✔✔3 meters
90% of man made radiation to the population is related to? - ✔✔Medical Radiography
and Dental
For each peak xray voltage, what lead equivalent is required?
100kV or less (o-100)
Between 101kV-149kV
150kV or greater (150+) - ✔✔0-100kV = 0.25mm of lead
Greater than 100kV but less then 150kV = 0.35mm of lead
150kV or greater = 0.50mm of lead
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
,What protective equipment is required during interventional procedures - ✔✔Full wrap
around protective gowns of 0.50mm pb in the front panels and 0.25mm pb in the back
panels
Thyroid shields with an equivalent of 0.50mm of pb
Lead drapes/curtains mounted to II of 0.25mm of pb at 100kv
What lead equivalent must protective gloves/ gauntlets possess? - ✔✔0.25mm of pb
What lead equivalent must ceiling mounted lead screens and moveable shields
provide? - ✔✔0.50mm of pb
What are the annual radiation dose limits for radiation workers? - ✔✔Whole body=
20mSv
Lens of eye= 150mSv
Skin = 500mSv
Hands = 150mSv
All other organs = 500mSv
For pregnant women an effective dose of 4 mSv must be applied for the remainder of
the pregnancy from all sources
What are the annual radiation dose limits to members of the public? - ✔✔Whole body =
1mSv
Lens of the eye= 15mSv
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
, Skin = 50mSv
Hands = 50mSv
All other organs = 50mSv
*these also apply for students*
What are primary protective barriers? Give examples - ✔✔Primary barriers provide
shielding from the direct xray beam. Such as, the walls and floor where the tube can be
directed
-The wall behind the wall bucky
-Floor under the table
What are secondary barriers and give examples - ✔✔Provide shielding against both
leakage and scattered radiation. Walls that the primary beam is not directed towards
and the ceiling are secondary barriers.
The control booth is also a secondary barrier, the primary beam should never be
directed towards it.
What should the focal spot to skin distance be for:
-Mobile equipment
-Stationary equipment
-Radioscopic equipment - ✔✔Must not be less than:
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 3
AND ANSWERS
How far away must the operator stand from the xray tube if not covered with lead? -
✔✔3 meters
90% of man made radiation to the population is related to? - ✔✔Medical Radiography
and Dental
For each peak xray voltage, what lead equivalent is required?
100kV or less (o-100)
Between 101kV-149kV
150kV or greater (150+) - ✔✔0-100kV = 0.25mm of lead
Greater than 100kV but less then 150kV = 0.35mm of lead
150kV or greater = 0.50mm of lead
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
,What protective equipment is required during interventional procedures - ✔✔Full wrap
around protective gowns of 0.50mm pb in the front panels and 0.25mm pb in the back
panels
Thyroid shields with an equivalent of 0.50mm of pb
Lead drapes/curtains mounted to II of 0.25mm of pb at 100kv
What lead equivalent must protective gloves/ gauntlets possess? - ✔✔0.25mm of pb
What lead equivalent must ceiling mounted lead screens and moveable shields
provide? - ✔✔0.50mm of pb
What are the annual radiation dose limits for radiation workers? - ✔✔Whole body=
20mSv
Lens of eye= 150mSv
Skin = 500mSv
Hands = 150mSv
All other organs = 500mSv
For pregnant women an effective dose of 4 mSv must be applied for the remainder of
the pregnancy from all sources
What are the annual radiation dose limits to members of the public? - ✔✔Whole body =
1mSv
Lens of the eye= 15mSv
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
, Skin = 50mSv
Hands = 50mSv
All other organs = 50mSv
*these also apply for students*
What are primary protective barriers? Give examples - ✔✔Primary barriers provide
shielding from the direct xray beam. Such as, the walls and floor where the tube can be
directed
-The wall behind the wall bucky
-Floor under the table
What are secondary barriers and give examples - ✔✔Provide shielding against both
leakage and scattered radiation. Walls that the primary beam is not directed towards
and the ceiling are secondary barriers.
The control booth is also a secondary barrier, the primary beam should never be
directed towards it.
What should the focal spot to skin distance be for:
-Mobile equipment
-Stationary equipment
-Radioscopic equipment - ✔✔Must not be less than:
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 3
