WorksheetsRT 101 PREFINAL QUIZ 2
Total questions: 30
Worksheet time: 10mins
Fill in the blank: An X-ray tube is a special type of ______ (anode & cathode).
diode
resistor
transistor
capacitor
What does an X-ray tube convert electrical energy into?
Mechanical energy
Chemical energy
Electromagnetic energy
Thermal energy
The X-ray beam is produced when electrons strike which part of the X-ray tube?
Tungsten Anode
Glass Envelope
Cathode Filament
Lead Shield
Fill in the blank: The ceiling-support system consists of two perpendicular sets of ______-mounted rails.
ceiling
wall
floor
corner
What type of medical equipment is shown in the image?
MRI Scanner
Ultrasound Machine
X-ray Machine
CT Scanner
Fill in the blank: In the Floor-To-Ceiling Support System, the x-ray tube slides up & down the column as the column ______.
rotates
expands
contracts
vibrates
The protective housing provides a thermal cushion to ________ heat.
dissipate
absorb
generate
increase
The protective housing provides mechanical support for the tube and protects it from damage caused by rough handling.
True
False
A properly designed protective housing reduces the level of leakage radiation to less than _______ at 1 meter.
100 mR/hr
10 mR/hr
1 R/hr
500 mR/hr
Leakage radiation in the X-ray tube diagram refers to:
Radiation that escapes from the X-ray tube housing
Radiation that is intentionally directed at the patient
Radiation that is absorbed by the tube housing
Radiation that is produced only when the tube is off
What is the size of the window mentioned in the slide?
2 cm2
5 cm2
10 cm2
20 cm2
What is the function of the 'Lead' in the device?
To produce the useful beam
To prevent leakage radiation
To connect high voltage
To filter the beam
What material is used for the glass enclosure?
PYREX GLASS
ACRYLIC
POLYCARBONATE
PVC
Name the two primary parts of the cathode in an x-ray tube.
Filament and focusing cup
Anode and rotor
Glass envelope and stator
Target and collimator
What material is a filament made of?
Pure tungsten
Thorium
Thoriated tungsten
Copper
What is the percentage of additional thorium added to thoriated tungsten in a filament?
5-10%
1-2%
10-20%
0.1-0.5%
What is one benefit of adding thorium to tungsten in a filament?
Prolongs tube life
Increases filament color
Reduces filament weight
Decreases electrical resistance
Which material provides higher thermionic emission?
Copper
Tungsten
Silver
Gold
What can happen if the filament is vaporized?
It can cause arcing and can lead to tube failure.
It will increase the tube's efficiency.
It will improve image quality.
It will reduce the tube's lifespan only slightly.
Fill in the blank: The most common cause of tube failure is __________ with deposition on the inside of the glass enclosure.
tungsten vaporization
copper oxidation
argon leakage
filament swelling
Fill in the blank: The focusing cup is a metal shroud that surrounds the _______.
filament
anode
cathode ray
rotor
Two factors that determine the effectiveness of the focusing cup are:
Shape and charge of the cup
Material and color of the cup
Size and weight of the cup
Temperature and humidity
Fill in the blank: One function of the anode is to act as an __________ conductor.
Electrical conductor
Thermal insulator
Magnetic shield
Optical filter
Fill in the blank: The anode provides mechanical support for the __________.
target
cathode
filament
grid
Fill in the blank: The anode acts as a thermal __________.
dissipator
conductor
insulator
generator
Name one system where a stationary anode is used.
Dental x-ray imaging system
CT scanner
MRI machine
Ultrasound system
Name one system where a stationary anode is used.
Portable x-ray imaging system
CT scanner
Mammography unit
Fluoroscopy system
What is the typical speed range (in rpm) of a rotating anode?
3,600-10,000 rpm
6300-10000 rpm
12,000-20,000 rpm
3060-10000 rpm
What did Joseph John Thomson discover?
Proton
Neutron
Electron
Nucleus
Which describes the relationship between wavelength and frequency?
Wavelength increases as frequency increases
Wavelength is independent of frequency
wavelength decreases as frequency inceeases
wavelength and frequency are always equal
