Radiographic Physics: X-Ray Tube Quiz

Beschreibung

Physics Quiz am Radiographic Physics: X-Ray Tube Quiz, erstellt von Alexandra Ertmer am 25/10/2017.
Alexandra Ertmer
Quiz von Alexandra Ertmer, aktualisiert more than 1 year ago
Alexandra Ertmer
Erstellt von Alexandra Ertmer vor etwa 7 Jahre
5964
4

Zusammenfassung der Ressource

Frage 1

Frage
The x-ray intensity is lower on the anode side of the tube because of the:
Antworten
  • Line Focus Principle
  • Heel Effect
  • Focusing Cup
  • Filament Length

Frage 2

Frage
Which of the following is (are) true regarding the protective housing of the x-ray tube?
Antworten
  • Provides mechanical support for the x-ray tube.
  • Protects the tube from damage.
  • Aids in absorbing low energy radiation created within the x-ray tube.
  • All of the above

Frage 3

Frage
The negative side of the x-ray tube holds the:
Antworten
  • Filament
  • Anode
  • Target
  • Rotor

Frage 4

Frage
Tube arcing is caused by:
Antworten
  • A small focal spot
  • The angle of the anode
  • Tungsten collecting on the envelope of the tube
  • Not warming up the tube

Frage 5

Frage
A dual focus tube has two:
Antworten
  • Anodes
  • Filaments
  • Rotors
  • Stators

Frage 6

Frage
An x-ray tube has a tube rating chart to show:
Antworten
  • Housing cooling times
  • Anode cooling times
  • Maximum exposure times
  • Maximum patient doses

Frage 7

Frage
This device is located outside the glass envelope:
Antworten
  • Stator
  • Rotor
  • Focal Spot
  • Filament

Frage 8

Frage
Which of the following is needed to produce an x-ray?
Antworten
  • A source of electrons
  • A vacuum
  • A large potential difference
  • All the above

Frage 9

Frage
The tube current is changed by changing the:
Antworten
  • Filament Current
  • Anode Voltage
  • Focal Spot Size
  • Exposure Time

Frage 10

Frage
A function of the cathode is to:
Antworten
  • Be a focal spot
  • Produce an electrical connection to the rectifier
  • Produce a thermionic cloud
  • Rotate the anode

Frage 11

Frage
The function of the rotor & the stator assembly is to:
Antworten
  • Create a vacuum
  • Insulate the anode
  • Rotate the anode
  • Produce a thermionic cloud

Frage 12

Frage
Each of the following is a part of the cathode assembly except the:
Antworten
  • Stator
  • Filament
  • Focusing Cup
  • Associated Wiring

Frage 13

Frage
Each of the following is a material of choice for the filament except:
Antworten
  • Copper
  • Tungsten
  • Rhenium
  • Molybdenum

Frage 14

Frage
Filament materials are chosen for their: 1)High Melting Point 2)Low Melting Point 3)Ability to Vaporize Easily 4)High Atomic Number
Antworten
  • Numbers 1 & 3 only
  • Numbers 2 & 3 only
  • Numbers 1 & 4 only
  • Numbers 2 & 4 only
  • Numbers 1, 3, & 4 only

Frage 15

Frage
The focusing cup has a _______ charge.
Antworten
  • Negative
  • Positive

Frage 16

Frage
The purpose of the focusing cup is to:
Antworten
  • Alter the filament size
  • Group the electrons for their passage to the anode
  • Regulate anode rotation speed
  • Increase the heat capacity

Frage 17

Frage
X-ray production occurs at the:
Antworten
  • Anode
  • Cathode
  • Filament
  • Stator

Frage 18

Frage
To extend the x-ray tube life, the technologist should: 1)Perform warm up exposures at the beginning of each day 2)Extend the time that the boost current (prep) button is held down 3)Avoid repeated exposures at or near the tube's capacity
Antworten
  • 1 & 2 Only
  • 1 & 3 Only
  • 2 & 3 Only
  • 1, 2, & 3

Frage 19

Frage
When the anode angle is less than 45 degrees:
Antworten
  • Effective focal spot is smaller than the actual focal spot
  • The actual focal spot of smaller than the effective focal spot
  • The angle has no effect on focal spot

Frage 20

Frage
The exact point in the x-ray unit where x-ray photons are created in:
Antworten
  • Focusing Cup
  • Rotor
  • Filament
  • Focal Spot

Frage 21

Frage
To cover a 14x17 inch field at 40 inch SID, a ________ target angle is required.
Antworten
  • 3 Degrees
  • 5 Degrees
  • 7 Degrees
  • 12 Degrees

Frage 22

Frage
The use of line focus principle causes a problem known as the ________.
Antworten
  • Anode Heel Effect
  • Space Charge Effect
  • Quantum Mottle
  • Vacuum

Frage 23

Frage
The disadvantage of a small target angle is:
Antworten
  • Increased heat distribution & capacity
  • Greater field coverage
  • A greater anode heel effect
  • A more uniform radiographic density

Frage 24

Frage
Warming the x-ray tube: 1)Is never necessary 2)Prevents cracking of the anode 3)Helps maintain the vacuum within the tube
Antworten
  • 1 & 2 Only
  • 2 & 3 Only

Frage 25

Frage
Pitting of the anode commonly occurs:
Antworten
  • Consistent low but very long exposures
  • Consistent single, high exposures
  • Failure to warm up the tube
  • All the Above

Frage 26

Frage
Anode melt might occur in a specific area on the anode due to:
Antworten
  • The unit not being warmed up properly
  • Extended use
  • When the kVp is too high
  • When the stator fails & the rotor ceases to turn

Frage 27

Frage
The anode heel effect:
Antworten
  • Exists because some x-rays are absorbed by the surface of the anode
  • Is caused by the charge difference between the anode & cathode
  • Depends on the mA & kVp
  • Is reduced by dual focal spot

Frage 28

Frage
The line focus principle:
Antworten
  • Makes use of an angled cathode structure
  • Produces x-ray lines
  • Spreads the heat over a larger part if the anode

Frage 29

Frage
To best apply the anode heel effect, the anode should be placed towards which end of the body when performing an AP projection?
Antworten
  • Towards the Knee
  • Towards the Hip

Frage 30

Frage
The vacuum created within the x-ray tube increase the efficiency of the tube's operation.
Antworten
  • True
  • False

Frage 31

Frage
The cathode is the positive side of the x-ray tube.
Antworten
  • True
  • False

Frage 32

Frage
The faster the anode rotation, the better the heat dissipation.
Antworten
  • True
  • False

Frage 33

Frage
Many x-ray tubes have two filaments:
Antworten
  • Because the second filament can be used as a spare part when the first is burned out
  • Provide two focal spots
  • To allow cooling of the filament by alternating exposures
  • To improve tube cooling by sharing the hear between two filaments

Frage 34

Frage
Modern general purpose radiographic equipment uses a stationary anode.
Antworten
  • True
  • False

Frage 35

Frage
The most common diagnostic radiography target angle is 12 degrees.
Antworten
  • True
  • False

Frage 36

Frage
The anode disk is composed of several different materials.
Antworten
  • True
  • False

Frage 37

Frage
Changing the angle of the anode will change the effective focal spot.
Antworten
  • True
  • False

Frage 38

Frage
One way to extend tube life is by using high mA stations when possible.
Antworten
  • True
  • False
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