ARRT Proficiency knowledge test Exam Questions
and certified Answers 2025/2026
How will the x-ray photons intensity be affected if the SID is doubled? -
correct answer The intensity of the beam will decrease four times this is
known as the inverse square law
If the patient received 2000 MRAD during a 10 minute fluoro exam how
much exposure will the patient recieve in five-minutes? - correct answer
1000 Mrad which is half of what they received in 10 minutes
The photo electric effect is an interaction between x-ray photons and... -
correct answer And inner shell electron
What is recommended for the pregnant radiographer to use as far as the
dosimeter badge? - correct answer Wear one dosimeter badge outside
the lead apron at the collar level and one dosimeter badge inside the lead
apron at the level of the waist so A total of two badges are worn and these
badges position should never be interchanged
What is likely to occur if 25 Rad is delivered to fetus in early pregnancy? -
correct answer Spontaneous abortion will occur if 25 rad were to be
delivered to fetus during the second through the 10th week
Skeletal abnormalities may appear
How does filtration affect the primary beam? - correct answer It
increases the average energy of the primary beam by filtering out the low-
energy photons
,The unit of measurement used to express occupational exposure is the? -
correct answer REM (seivert)
The unit of absorbed dose is? - correct answer Rad (gray)
Biologic material is most sensitive to irradiation under which condition? -
correct answer Oxygenated
The reduction in the intensity of the x-ray beam as it passes through a
material is termed? - correct answer Attenuation
The largest amount of diagnostic x-ray absorption occurs in which tissue? -
correct answer Bone since it is the most dense tissue
The effects of radiation on biological material are dependent on several
factors. If a quantity of radiation is delivered to a body over a long period of
time the fact will be? - correct answer The effect will be less than if it
were delivered all at one time for a short period of time
What interaction contributes most to occupational exposure? - correct
answer Compton Scatter
What factors affect both the quality and the quantity of the primary been? -
correct answer Half value layer (hvl)
KV
,The unit of exposure in air is? - correct answer Roentgen (C/kg)
How often should lead aprons and lead gloves be check for cracks? -
correct answer Annually or once a year by the fluoroscope
Which radiation monitors function on the basis of stimulated luminescence?
- correct answer 0SL and TLD
What is the single most important scattering object in both radiography in
Fluoroscopy? - correct answer The patient
A group of exposure factors are given which one will deliver the least
amount of exposure? - correct answer Highest kvp with lowest mass will
give the least or safest amount
The purpose of filters in a film badge is? - correct answer To measure
radiation quality
Compton scatter occurs when a high-energy incident electron ejects what?
- correct answer An outer shell electron
When a fast screen film system is used with the slow screen film automatic
system the resulting images are? - correct answer Too dark or
overexposed
A change to 3 phase and 6 pulse = ____ (original mas) - correct answer
2/3
, A change to 3 phase and 12 pulse = ____ (original mas) - correct answer
1/2
What does a penetimeter evaluate? - correct answer Penumbra
Edge blur - correct answer Penumbra
Field of view (fov)/ matrix = - correct answer Pixel Size
As matrix size increases pixel size - correct answer Decreases
Mas controls - correct answer Density
KVP controls - correct answer Contrast
Windowing - correct answer Changing image brightness
Contrast Scale
A star pattern tests what? - correct answer Focal spot size
In three phase equipment half of the expected arc is a sign of? - correct
answer Rectifier failure
For three-phase equipment a synchronous spinning top test is used to
check? - correct answer Rectifier function and test timer accuracy
and certified Answers 2025/2026
How will the x-ray photons intensity be affected if the SID is doubled? -
correct answer The intensity of the beam will decrease four times this is
known as the inverse square law
If the patient received 2000 MRAD during a 10 minute fluoro exam how
much exposure will the patient recieve in five-minutes? - correct answer
1000 Mrad which is half of what they received in 10 minutes
The photo electric effect is an interaction between x-ray photons and... -
correct answer And inner shell electron
What is recommended for the pregnant radiographer to use as far as the
dosimeter badge? - correct answer Wear one dosimeter badge outside
the lead apron at the collar level and one dosimeter badge inside the lead
apron at the level of the waist so A total of two badges are worn and these
badges position should never be interchanged
What is likely to occur if 25 Rad is delivered to fetus in early pregnancy? -
correct answer Spontaneous abortion will occur if 25 rad were to be
delivered to fetus during the second through the 10th week
Skeletal abnormalities may appear
How does filtration affect the primary beam? - correct answer It
increases the average energy of the primary beam by filtering out the low-
energy photons
,The unit of measurement used to express occupational exposure is the? -
correct answer REM (seivert)
The unit of absorbed dose is? - correct answer Rad (gray)
Biologic material is most sensitive to irradiation under which condition? -
correct answer Oxygenated
The reduction in the intensity of the x-ray beam as it passes through a
material is termed? - correct answer Attenuation
The largest amount of diagnostic x-ray absorption occurs in which tissue? -
correct answer Bone since it is the most dense tissue
The effects of radiation on biological material are dependent on several
factors. If a quantity of radiation is delivered to a body over a long period of
time the fact will be? - correct answer The effect will be less than if it
were delivered all at one time for a short period of time
What interaction contributes most to occupational exposure? - correct
answer Compton Scatter
What factors affect both the quality and the quantity of the primary been? -
correct answer Half value layer (hvl)
KV
,The unit of exposure in air is? - correct answer Roentgen (C/kg)
How often should lead aprons and lead gloves be check for cracks? -
correct answer Annually or once a year by the fluoroscope
Which radiation monitors function on the basis of stimulated luminescence?
- correct answer 0SL and TLD
What is the single most important scattering object in both radiography in
Fluoroscopy? - correct answer The patient
A group of exposure factors are given which one will deliver the least
amount of exposure? - correct answer Highest kvp with lowest mass will
give the least or safest amount
The purpose of filters in a film badge is? - correct answer To measure
radiation quality
Compton scatter occurs when a high-energy incident electron ejects what?
- correct answer An outer shell electron
When a fast screen film system is used with the slow screen film automatic
system the resulting images are? - correct answer Too dark or
overexposed
A change to 3 phase and 6 pulse = ____ (original mas) - correct answer
2/3
, A change to 3 phase and 12 pulse = ____ (original mas) - correct answer
1/2
What does a penetimeter evaluate? - correct answer Penumbra
Edge blur - correct answer Penumbra
Field of view (fov)/ matrix = - correct answer Pixel Size
As matrix size increases pixel size - correct answer Decreases
Mas controls - correct answer Density
KVP controls - correct answer Contrast
Windowing - correct answer Changing image brightness
Contrast Scale
A star pattern tests what? - correct answer Focal spot size
In three phase equipment half of the expected arc is a sign of? - correct
answer Rectifier failure
For three-phase equipment a synchronous spinning top test is used to
check? - correct answer Rectifier function and test timer accuracy
