Chapter 07 The X-Ray Tube-Bushong Test Bank

Chapter 07: The X-Ray Tube Bushong: Radiologic Science for Technologists




MULTIPLE CHOICE


1. The most widely used support structure for the x-ray tube is the . a. C-
arm
b. floor-to-ceiling mount
c. ceiling support system
d. floor support system




ANS: C
The most widely used support structure for the x-ray tube is the ceiling support system.


2. The external structure of the x-ray tube includes the support structure, the protective
housing, and the .
a. anode
b. cathode
c. glass envelope
d. focusing cup




ANS: C
The external structure of the x-ray tube includes the support structure, the protective
housing, and the glass envelope.
3. As an x-ray tube ages, the inside can become coated with tungsten, which can cause in
the tube.
a. convection

, b. anode pitting
c. off-focus radiation
d. arcing




ANS: D
Tungsten coating within the tube can cause arcing.


4. The negative side of the x-ray tube holds the .
a. filament
b. anode
c. target
d. rotor




ANS: A
The negative side of the x-ray tube holds the filament.


5. What is the most common cause of tube failure?
a. Cracked anode
b. Loose bearings
c. Pitted anode
d. Tungsten vaporization




ANS: D
The most common cause of tube failure is tungsten vaporization.

, 6. The filament is made of .
a. graphite
b. tungsten
c. copper
d. molybdenum




ANS: B
The filament is made of tungsten.


7. Thermionic emission at the filament creates a .
a. space charge
b. grid control
c. line focus
d. heel effect
ANS: A
Thermionic emission at the filament creates a space charge.


8. The rotating anode is turned by a .
a. thermal cushion
b. rotating belt
c. magnetic field
d. mechanical pulley




ANS: C
The induction motor works by electromagnetic induction.


9. When electrons bombard the target, % of their kinetic energy is converted to heat. a. 10