Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
when radiographing the lungs or small body parts, which of the
following best describes the effect of using high kVp techniques on
scatter radiation:
increase scatter radiation but not substantially
decrease scatter radiation but no substantially
decrease scatter substantially
increase scatter substantially -
correct answer ✅increase scatter radiation but not substantially
The end of an extension cylinder is 25 cm from the focal spot and
an SID of 75 cm is used. If the projected field size at the film is 30
cm, what was the diameter of the cylinder used:
SID/SOD = F(IR)/F(A)
8.5 cm
20 cm
,Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
5.25 cm
12.5 cm
10 cm -
correct answer ✅10 cm
75/25 = 30/x
Generally, an image with only a few shades of gray possesses:
low brightness
long gray scale
low level of noise
low density
high contrast -
correct answer ✅high contrast
Condensation, the change in state of matter from gas to liquid
results in:
decrease kinetic energy
,Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
increase kinetic energy
decrease in potential energy
increase in potential energy -
correct answer ✅decrease in potential energy
When the 15% increase in kVp is applied along with a halving of the
mAs, experiments confirm that the net patient exposure is reduced
to about:
90%
50%
33%
80%
67% -
correct answer ✅67%
with all other factors unchanged if SID is decreased magnification in
the image will
, Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
not change
increase as a direct result
decrease as a direct result
may be affected but not controlled by it -
correct answer ✅increase as a direct result
If a beam of radiation containing 1,000 x-rays is spread out over a
square field that measures 10 cm long and 10 cm wide, what is the
concentration of x-rays per square centimeter?
100 xrays per cm2
1 xrays per cm2
10,000 xrays per cm2
1,000 xrays per cm2
& Answers (Grade A+)
when radiographing the lungs or small body parts, which of the
following best describes the effect of using high kVp techniques on
scatter radiation:
increase scatter radiation but not substantially
decrease scatter radiation but no substantially
decrease scatter substantially
increase scatter substantially -
correct answer ✅increase scatter radiation but not substantially
The end of an extension cylinder is 25 cm from the focal spot and
an SID of 75 cm is used. If the projected field size at the film is 30
cm, what was the diameter of the cylinder used:
SID/SOD = F(IR)/F(A)
8.5 cm
20 cm
,Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
5.25 cm
12.5 cm
10 cm -
correct answer ✅10 cm
75/25 = 30/x
Generally, an image with only a few shades of gray possesses:
low brightness
long gray scale
low level of noise
low density
high contrast -
correct answer ✅high contrast
Condensation, the change in state of matter from gas to liquid
results in:
decrease kinetic energy
,Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
increase kinetic energy
decrease in potential energy
increase in potential energy -
correct answer ✅decrease in potential energy
When the 15% increase in kVp is applied along with a halving of the
mAs, experiments confirm that the net patient exposure is reduced
to about:
90%
50%
33%
80%
67% -
correct answer ✅67%
with all other factors unchanged if SID is decreased magnification in
the image will
, Physics (Mock ARRT) Exam Questions
& Answers (Grade A+)
not change
increase as a direct result
decrease as a direct result
may be affected but not controlled by it -
correct answer ✅increase as a direct result
If a beam of radiation containing 1,000 x-rays is spread out over a
square field that measures 10 cm long and 10 cm wide, what is the
concentration of x-rays per square centimeter?
100 xrays per cm2
1 xrays per cm2
10,000 xrays per cm2
1,000 xrays per cm2
