Chapter 08 X-Ray Production-Bushong Test Bank

Chapter 08: X-Ray Production Bushong: Radiologic Science for Technologists




MULTIPLE CHOICE


1. Projectile electrons travel from .
a. anode to cathode
b. cathode to anode
c. target to patient
d. inner shell to outer shell




ANS: B
Projectile electrons travel from filament to target.


2. During an exposure, most of the energy of the projectile electrons is converted to
.
a. kinetic; x-rays
b. x-ray; kinetic
c. kinetic; heat
d. heat; kinetic




ANS: C
During an exposure, most of the kinetic energy of the projectile electrons is converted to
heat.


3. At the target, the projectile electrons interact with .
a. outer-shell electrons

, b. inner-shell electrons
c. atomic nuclei
d. inner-shell and outer-shell electrons




ANS: D
The projectile electrons interact with both outer-shell and inner-shell electrons in the
target.


4. The efficiency of x-ray production is the tube current.
a. indirectly proportional to
b. directly proportional to
c. not affected by
d. strongly affected by




ANS: C
The efficiency of x-ray production is unrelated to tube current.


5. Most of the heat generated at the target is due to _ .
a. inner-shell ionization
b. outer-shell excitation
c. nucleus bombardment
d. K x-rays




ANS: B
Most of the heat generated at the target is due to outer-shell excitation.

, 6. The production of heat at the anode is directly proportional to . a. rotor speed
b. filament current
c. kVp
d. tube current




ANS: D
The production of heat at the anode is directly proportional to tube current.


7. The efficiency of x-ray production increases as increases.
a. mA
b. kVp
c. time
d. mA and kVp




ANS: B
The efficiency of x-ray production increases as kVp increases.


8. Approximately of the kinetic energy of the projectile electrons is converted to x-
rays at the target.
a. 1%
b. 10%
c. 50%
d. 99%




ANS: B