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RADIOLOGICAL (BIO 123) SCIENCES MOCK EXAM 1 MULTIPLE QUESTIONS WITH ACCURATE SOLUTION A+ GRADED.
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RADIOLOGICAL (BIO 123) SCIENCES MOCK EXAM 1 MULTIPLE QUESTIONS WITH ACCURATE SOLUTION A+ GRADED.
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RADIOLOGICAL (BIO 123) SCIENCES MOCKEXAM 1 MULTIPLE QUESTIONS WITH
ACCURATE SOLUTION A+ GRADED.
The relative skin dose for a given energy photon beam:
A. decreases with increasing field size
B. increases with increasing field size
C. increases with decreasing field size
D. stays the same with any field size
E. must be calculated for each individual situation
Verified Answer -B
Which of the following can be classified as indirectly ionizing radiation?
A. photons
B. electrons
C. alpha particles
D. protons
,E. beta particles
Verified Answer -A
The linear attenuation coefficient for a 6MV beam is 0.51 cm-1. The
thickness of a two half value layer block is:
A. 0.74 cm
B. 1.36 cm
C. 1.47 cm
D. 2.72 cm
E. 2.83 cm
Verified Answer -D
1 half value layer = 0.693/0.51 = 1.3588
2 half value layers = 1.3588x2=2.72
Bremsstrahlung radiation may be produced by:
A. neutrons striking low atomic number targets
B. electrons striking high atomic number targets
,C. alpha particles striking low atomic number targets
D. protons striking low atomic number targets
E. all are correct
Verified Answer -B
In a linear accelerator with a horizontally mounted waveguide, the
component that directs the electron beam to the output window from the
accelerator guide is:
A. a klystron
B. an electron gun
C. a high-voltage power supply
D. a bending magnet
E. a thyratron
Verified Answer -D
Which of the following is closest to a dose regimen for early stage
seminoma?
, A. 10 Gy given in 20 fractions
B. 20 Gy given in 10 fractions
C. 30 Gy given in 20 fractions
D. 30 Gy given in 10 fractions
Verified Answer -B?
For x-rays generated at less than 250 kVp, there is a substantial increase
of dose inside bone because of an increase in which of the following?
A. electron density relative to soft tissue
B. number of secondary photons from compton interactions
C. electron fluence arising from photoelectric absorption
D. backscatter effect at the bone/soft tissue interface
E. percentage of low-energy photons in the beam
Verified Answer -C
In general, which of the following structures is more radioresistant?
A. small bowel
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