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Radiographic Physics: X-Ray Tube Quiz

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Physics Quiz sobre Radiographic Physics: X-Ray Tube Quiz, criado por Alexandra Ertmer em 25-10-2017.
Alexandra Ertmer
Quiz por Alexandra Ertmer, atualizado more than 1 year ago
Alexandra Ertmer
Criado por Alexandra Ertmer aproximadamente 7 anos atrás
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Resumo de Recurso

Questão 1

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

Questão 2

Questão
Which of the following is (are) true regarding the protective housing of the x-ray tube?
Responda
  • 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

Questão 3

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

Questão 4

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

Questão 5

Questão
A dual focus tube has two:
Responda
  • Anodes
  • Filaments
  • Rotors
  • Stators

Questão 6

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

Questão 7

Questão
This device is located outside the glass envelope:
Responda
  • Stator
  • Rotor
  • Focal Spot
  • Filament

Questão 8

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

Questão 9

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

Questão 10

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

Questão 11

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

Questão 12

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

Questão 13

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

Questão 14

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

Questão 15

Questão
The focusing cup has a _______ charge.
Responda
  • Negative
  • Positive

Questão 16

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

Questão 17

Questão
X-ray production occurs at the:
Responda
  • Anode
  • Cathode
  • Filament
  • Stator

Questão 18

Questão
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
Responda
  • 1 & 2 Only
  • 1 & 3 Only
  • 2 & 3 Only
  • 1, 2, & 3

Questão 19

Questão
When the anode angle is less than 45 degrees:
Responda
  • 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

Questão 20

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

Questão 21

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

Questão 22

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

Questão 23

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

Questão 24

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

Questão 25

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

Questão 26

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

Questão 27

Questão
The anode heel effect:
Responda
  • 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

Questão 28

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

Questão 29

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

Questão 30

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

Questão 31

Questão
The cathode is the positive side of the x-ray tube.
Responda
  • True
  • False

Questão 32

Questão
The faster the anode rotation, the better the heat dissipation.
Responda
  • True
  • False

Questão 33

Questão
Many x-ray tubes have two filaments:
Responda
  • 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

Questão 34

Questão
Modern general purpose radiographic equipment uses a stationary anode.
Responda
  • True
  • False

Questão 35

Questão
The most common diagnostic radiography target angle is 12 degrees.
Responda
  • True
  • False

Questão 36

Questão
The anode disk is composed of several different materials.
Responda
  • True
  • False

Questão 37

Questão
Changing the angle of the anode will change the effective focal spot.
Responda
  • True
  • False

Questão 38

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

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