MDCB Practice Set 1 - Test 1 Exam
Questions With 100% Verified Answers
What is the approximate density of healthy lung tissue?
A. 0.30 g/cc
B. 0.95 g/cc
C. 1.00 g/cc
D. 1.03 g/cc -
correct answer ✅A
2. The accelerator component that injects electrons into the linear
accelerator is:
A. a klystron.
B. an electron gun.
C. a bending magnet.
D. a thyratron. -
correct answer ✅B
3. Radiation damage to the fetus resulting in severe birth defects
would most often occur when radiation was delivered at which
time post-fertilization?
A. 0 - 2 weeks
B. 3 - 12 weeks
C. 13 - 24 weeks
,MDCB Practice Set 1 - Test 1 Exam
Questions With 100% Verified Answers
D. 23 - 32 weeks -
correct answer ✅B
4. The decay constant for a radioactive source that has a half-life of
60 days is:
A. 0.012.
B. 0.170.
C. 0.662.
D. 1.250. -
correct answer ✅A
5. The function of a maze to a megavoltage treatment room is to:
A. keep operators as remote from the machine as possible.
B. attenuate photons originating from the head of the linear
accelerator.
C. separate the primary and scattered components of the beam.
D. minimize radiation levels at the door. -
correct answer ✅D
6. The anatomic location of the seminal vesicles is:
A. inferior to the prostate and angled anteriorly near the bladder.
, MDCB Practice Set 1 - Test 1 Exam
Questions With 100% Verified Answers
B. inferior to the prostate and angled posteriorly near the rectum.
C. superior to the prostate and angled anteriorly near the bladder.
D. superior to the prostate and angled posteriorly near the rectum.
-
correct answer ✅D
7. Two missed treatment days due to LINAC malfunction:
A. may be compensated by adding the same or even more fractions
to the treatment course with weekend treatment if possible.
B. may allow some tumors with high growth fractions and long cell
cycle times to recover through repopulation.
C. are of major clinical relevance in most cases.
D. may be made up by increasing the fraction size for the remainder
of the treatment course. -
correct answer ✅A
8. For a 4-field box technique, which of the following will deliver the
lowest dose to the femoral heads?
A. 100 source-to-surface distance (SSD), equal dmax dose to all
fields
B. 100 source-to-surface distance (SSD), equal target dose to all
fields
Questions With 100% Verified Answers
What is the approximate density of healthy lung tissue?
A. 0.30 g/cc
B. 0.95 g/cc
C. 1.00 g/cc
D. 1.03 g/cc -
correct answer ✅A
2. The accelerator component that injects electrons into the linear
accelerator is:
A. a klystron.
B. an electron gun.
C. a bending magnet.
D. a thyratron. -
correct answer ✅B
3. Radiation damage to the fetus resulting in severe birth defects
would most often occur when radiation was delivered at which
time post-fertilization?
A. 0 - 2 weeks
B. 3 - 12 weeks
C. 13 - 24 weeks
,MDCB Practice Set 1 - Test 1 Exam
Questions With 100% Verified Answers
D. 23 - 32 weeks -
correct answer ✅B
4. The decay constant for a radioactive source that has a half-life of
60 days is:
A. 0.012.
B. 0.170.
C. 0.662.
D. 1.250. -
correct answer ✅A
5. The function of a maze to a megavoltage treatment room is to:
A. keep operators as remote from the machine as possible.
B. attenuate photons originating from the head of the linear
accelerator.
C. separate the primary and scattered components of the beam.
D. minimize radiation levels at the door. -
correct answer ✅D
6. The anatomic location of the seminal vesicles is:
A. inferior to the prostate and angled anteriorly near the bladder.
, MDCB Practice Set 1 - Test 1 Exam
Questions With 100% Verified Answers
B. inferior to the prostate and angled posteriorly near the rectum.
C. superior to the prostate and angled anteriorly near the bladder.
D. superior to the prostate and angled posteriorly near the rectum.
-
correct answer ✅D
7. Two missed treatment days due to LINAC malfunction:
A. may be compensated by adding the same or even more fractions
to the treatment course with weekend treatment if possible.
B. may allow some tumors with high growth fractions and long cell
cycle times to recover through repopulation.
C. are of major clinical relevance in most cases.
D. may be made up by increasing the fraction size for the remainder
of the treatment course. -
correct answer ✅A
8. For a 4-field box technique, which of the following will deliver the
lowest dose to the femoral heads?
A. 100 source-to-surface distance (SSD), equal dmax dose to all
fields
B. 100 source-to-surface distance (SSD), equal target dose to all
fields
