PHYSICS (MOCK ARRT) QUESTIONS
AND ANSWERS WITH VERIFIED
SOLUTIONS 100% CORRECT RATED A+
Q1: When radiographing the lungs or small body parts, what effect does using
high kVp techniques have on scatter radiation?
A1: High kVp techniques increase scatter radiation, but not substantially.
Q2: 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?
A2: The diameter of the cylinder was 10 cm.
(Calculation: SID/SOD = F(IR)/F(A) → 75/25 = 30/x → x = 10 cm.)
Q3: Generally, an image with only a few shades of gray possesses:
A3: High contrast.
Q4: Condensation, the change from gas to liquid, results in:
A4: A decrease in potential energy.
Q5: When a 15% increase in kVp is applied along with halving the mAs,
experiments confirm that the net patient exposure is reduced to about:
A5: 67%.
Q6: If SID is decreased, magnification in the image will:
A6: Increase as a direct result.
Q7: If a beam of radiation containing 1,000 x-rays is spread out over a square
field that measures 10 cm by 10 cm, what is the concentration of x-rays per
square centimeter?
A7: 10 x-rays per cm².
Q8: Which of the following characterizes Compton scattering?
A8: Compton scattering involves a recoil electron.
,Q9: The photoelectric interaction is essential not only for producing subject
contrast in the remnant beam but also for:
A9: The capture of the image by the IR.
production of long gray scale in image - ANSWER✔✔capture of the image by the
IR
which of the following is not a form of electromagnetic energy?
xrays
microwaves
infrared radiation
visible light
alpha radiation - ANSWER✔✔alpha radiation
with all other factors unchanged if the field size is increased subject contrast in the
remnant beam signal will
increase
decrease
not change
may be affected but not directly controlled - ANSWER✔✔decrease
grid frequency is
number of lead strips concentrated into a given distance
total amount of lead content
percentage of procedures upon which the grid could be used to advantage
, ratio of the height of the lead strips to the spaces between them -
ANSWER✔✔number of lead strips concentrated into a given distance
Wilhelm Roentgen discovery of xrays on Nov. 8, 1895:
was result of his own hypothesis of the existence of x-rays
had been preceded by other researchers looking for xrays
was duplicated about the same time by Ernest Rutherford
was truly accidental, as he was investigating something else - ANSWER✔✔was
truly accidental, as he was investigating something else
In projection geometry, which of the following portions of the x-ray beam diverges
isotropically:
all secondary rays in the remnant beam
CR in the primary beam
CR in the remnant beam
all primary rays except the CR - ANSWER✔✔all primary rays except the CR
In "closed systems" such as the universe, laws of conservation demand that:
potential energy of an object must increase as it drops
force cannot be multiplied
matter cannot be created nor annihilated
total energy must be equal before and after an event - ANSWER✔✔total energy
must be equal before and after an event
AND ANSWERS WITH VERIFIED
SOLUTIONS 100% CORRECT RATED A+
Q1: When radiographing the lungs or small body parts, what effect does using
high kVp techniques have on scatter radiation?
A1: High kVp techniques increase scatter radiation, but not substantially.
Q2: 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?
A2: The diameter of the cylinder was 10 cm.
(Calculation: SID/SOD = F(IR)/F(A) → 75/25 = 30/x → x = 10 cm.)
Q3: Generally, an image with only a few shades of gray possesses:
A3: High contrast.
Q4: Condensation, the change from gas to liquid, results in:
A4: A decrease in potential energy.
Q5: When a 15% increase in kVp is applied along with halving the mAs,
experiments confirm that the net patient exposure is reduced to about:
A5: 67%.
Q6: If SID is decreased, magnification in the image will:
A6: Increase as a direct result.
Q7: If a beam of radiation containing 1,000 x-rays is spread out over a square
field that measures 10 cm by 10 cm, what is the concentration of x-rays per
square centimeter?
A7: 10 x-rays per cm².
Q8: Which of the following characterizes Compton scattering?
A8: Compton scattering involves a recoil electron.
,Q9: The photoelectric interaction is essential not only for producing subject
contrast in the remnant beam but also for:
A9: The capture of the image by the IR.
production of long gray scale in image - ANSWER✔✔capture of the image by the
IR
which of the following is not a form of electromagnetic energy?
xrays
microwaves
infrared radiation
visible light
alpha radiation - ANSWER✔✔alpha radiation
with all other factors unchanged if the field size is increased subject contrast in the
remnant beam signal will
increase
decrease
not change
may be affected but not directly controlled - ANSWER✔✔decrease
grid frequency is
number of lead strips concentrated into a given distance
total amount of lead content
percentage of procedures upon which the grid could be used to advantage
, ratio of the height of the lead strips to the spaces between them -
ANSWER✔✔number of lead strips concentrated into a given distance
Wilhelm Roentgen discovery of xrays on Nov. 8, 1895:
was result of his own hypothesis of the existence of x-rays
had been preceded by other researchers looking for xrays
was duplicated about the same time by Ernest Rutherford
was truly accidental, as he was investigating something else - ANSWER✔✔was
truly accidental, as he was investigating something else
In projection geometry, which of the following portions of the x-ray beam diverges
isotropically:
all secondary rays in the remnant beam
CR in the primary beam
CR in the remnant beam
all primary rays except the CR - ANSWER✔✔all primary rays except the CR
In "closed systems" such as the universe, laws of conservation demand that:
potential energy of an object must increase as it drops
force cannot be multiplied
matter cannot be created nor annihilated
total energy must be equal before and after an event - ANSWER✔✔total energy
must be equal before and after an event
