Review Game Zone
Flash Cards
(current)
Games
Teachers
Search
Rad135 Final Exam Review- Part 2
Test Description: This content covers several chapters from the text to help you prepare for the final exam in Rad135.
Instructions: Answer all questions to get your test result.
1) The single function of an AEC is to eliminate the need to set
A
time
B
kVp
C
mAs
D
mA
2) When an AEC is used for an AP hip, which ionization chambers are utilized?
A
left and right cells only
B
all three cells
C
center cell
D
none
3) U.S. public law requires that generators automatically terminate AEC exposures at ____ mAs above 50 kVp
A
300
B
200
C
500
D
600
4) The backup time of most AECs is set at ____ of the anticipated manual exposure time.
A
50%
B
10%
C
100%
D
150%
5) As you are performing a KUB radiograph on a patient using AEC, you notice that your post-exposure readout is unusually high. A possible explanation for this high reading could be
A
backup timer was set too low
B
a detector was collimated out of the field of exposure
C
kVp was set too high
D
minimum response time was set too long
6) What percentage of target interaction results in the production of x-ray photons?
A
99%
B
90%
C
1%
D
50%
7) Characteristic interactions may occur only when the incident electron interacts with
A
force field of the nucleus
B
inner-shell electron
C
outer-shell electron
D
atom's valence band
8) The energy of a characteristic photon is
A
the difference between the binding energy of the outer and inner shells between which the electron dropped.
B
the sum of the binding energy of the outer and inner shells between which the electron dropped.
C
equal to the binding energy of the entering electron.
D
equal to the binding energy of the exiting electron.
9) When comparing the x-ray emission spectrum between beams produced at 70 kVp and 110 kVp,
A
the 110 kVp beam would demonstrate less brems and a higher characteristic spike.
B
the 70 kVp beam would demonstrate less brems and a higher characteristic spike.
C
the 110 kVp beam would demonstrate more brems and a higher characteristic spike.
D
the 70 kVp beam would demonstrate an equal amount of brems and characteristic radiation.
10) Tungsten is the anode material of choice for x-ray production because of its
A
excellent k-edge value for x-ray production
B
creation of off-focus radiation
C
ability of liberating electrons as secondary x-ray sources
D
ability to expand with high speed rotation G-forces
11) What percentage of the primary beam is formed by brems radiation when the kilovoltage (kVp) is 80-100?
A
80-90%
B
50-60%
C
20-30%
D
0-10%
12) What minimum kilovoltage is necessary for the production of characteristic photons in a diagnostic x-ray tube?
A
40 kVp
B
60 kVp
C
70 kVp
D
50 kVp
13) What is the recommended minimum total filtration for kilvoltage above 70?
A
3.5 mm Al
B
2.5 mm Al
C
1.5 mm Al
D
0.5 mm Al
14) What unit is used to measure x-ray tube current?
A
mAs
B
kVp
C
air kerma
D
milliamps
15) What happens to the number of electrons that cross the tube when the mA doubles?
A
doubles
B
quadruples due to the inverse square law
C
depends on the kVp setting
D
is cut in half due to the conservation of energy
16) Which of the following influences both the quality and the quantity of the x-ray beam?
A
mAs
B
kVp
C
distance
D
seconds
17) What new kilovoltage would double the exposure (density) of a tibia taken at 6 mAs at 70 kVp?
A
60
B
75
C
80.5
D
140
18) When kVp decreases, what happens to the number of photoelectric interactions?
A
interactions increase
B
interactions stop
C
no change
D
interactions decrease
19) At the end of the characteristic cascade, the ____ shell is the last shell to fill with a free electron.
A
q-shell
B
outermost
C
k-shell
D
innermost
20) Bremsstrahlung interactions may occur only when the incident electron interacts with ____.
A
the force field around the nucleus
B
the nucleus directly
C
an inner shell electron
D
an outer shell electron
*select an answer for all questions
Check Results & Get Answers
Play Games with the Questions Above
Teachers: Create FREE classroom games with your questions
Click for more info!
©2007-2024
ReviewGameZone.com
|
About
|
Privacy
|
Contact
|
Terms
|
Site Map
WAIT! Find what you needed?
×
Still Looking for the Answers?
Have Another Question?
Play a Review Game with These Questions?
Want to Make Your Own Test Like This One?