Alexandra Ertmer
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Physics Quiz on Radiographic Physics: X-Ray Tube Quiz, created by Alexandra Ertmer on 25/10/2017.

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Alexandra Ertmer
Created by Alexandra Ertmer about 7 years ago
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Radiographic Physics: X-Ray Tube Quiz

Question 1 of 38

1

The x-ray intensity is lower on the anode side of the tube because of the:

Select one of the following:

  • Line Focus Principle

  • Heel Effect

  • Focusing Cup

  • Filament Length

Explanation

Question 2 of 38

1

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

Select one of the following:

  • 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

Explanation

Question 3 of 38

1

The negative side of the x-ray tube holds the:

Select one of the following:

  • Filament

  • Anode

  • Target

  • Rotor

Explanation

Question 4 of 38

1

Tube arcing is caused by:

Select one of the following:

  • A small focal spot

  • The angle of the anode

  • Tungsten collecting on the envelope of the tube

  • Not warming up the tube

Explanation

Question 5 of 38

1

A dual focus tube has two:

Select one of the following:

  • Anodes

  • Filaments

  • Rotors

  • Stators

Explanation

Question 6 of 38

1

An x-ray tube has a tube rating chart to show:

Select one of the following:

  • Housing cooling times

  • Anode cooling times

  • Maximum exposure times

  • Maximum patient doses

Explanation

Question 7 of 38

1

This device is located outside the glass envelope:

Select one of the following:

  • Stator

  • Rotor

  • Focal Spot

  • Filament

Explanation

Question 8 of 38

1

Which of the following is needed to produce an x-ray?

Select one of the following:

  • A source of electrons

  • A vacuum

  • A large potential difference

  • All the above

Explanation

Question 9 of 38

1

The tube current is changed by changing the:

Select one of the following:

  • Filament Current

  • Anode Voltage

  • Focal Spot Size

  • Exposure Time

Explanation

Question 10 of 38

1

A function of the cathode is to:

Select one of the following:

  • Be a focal spot

  • Produce an electrical connection to the rectifier

  • Produce a thermionic cloud

  • Rotate the anode

Explanation

Question 11 of 38

1

The function of the rotor & the stator assembly is to:

Select one of the following:

  • Create a vacuum

  • Insulate the anode

  • Rotate the anode

  • Produce a thermionic cloud

Explanation

Question 12 of 38

1

Each of the following is a part of the cathode assembly except the:

Select one of the following:

  • Stator

  • Filament

  • Focusing Cup

  • Associated Wiring

Explanation

Question 13 of 38

1

Each of the following is a material of choice for the filament except:

Select one of the following:

  • Copper

  • Tungsten

  • Rhenium

  • Molybdenum

Explanation

Question 14 of 38

1

Filament materials are chosen for their:
1)High Melting Point
2)Low Melting Point
3)Ability to Vaporize Easily
4)High Atomic Number

Select one of the following:

  • Numbers 1 & 3 only

  • Numbers 2 & 3 only

  • Numbers 1 & 4 only

  • Numbers 2 & 4 only

  • Numbers 1, 3, & 4 only

Explanation

Question 15 of 38

1

The focusing cup has a _______ charge.

Select one of the following:

  • Negative

  • Positive

Explanation

Question 16 of 38

1

The purpose of the focusing cup is to:

Select one of the following:

  • Alter the filament size

  • Group the electrons for their passage to the anode

  • Regulate anode rotation speed

  • Increase the heat capacity

Explanation

Question 17 of 38

1

X-ray production occurs at the:

Select one of the following:

  • Anode

  • Cathode

  • Filament

  • Stator

Explanation

Question 18 of 38

1

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

Select one of the following:

  • 1 & 2 Only

  • 1 & 3 Only

  • 2 & 3 Only

  • 1, 2, & 3

Explanation

Question 19 of 38

1

When the anode angle is less than 45 degrees:

Select one of the following:

  • 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

Explanation

Question 20 of 38

1

The exact point in the x-ray unit where x-ray photons are created in:

Select one of the following:

  • Focusing Cup

  • Rotor

  • Filament

  • Focal Spot

Explanation

Question 21 of 38

1

To cover a 14x17 inch field at 40 inch SID, a ________ target angle is required.

Select one of the following:

  • 3 Degrees

  • 5 Degrees

  • 7 Degrees

  • 12 Degrees

Explanation

Question 22 of 38

1

The use of line focus principle causes a problem known as the ________.

Select one of the following:

  • Anode Heel Effect

  • Space Charge Effect

  • Quantum Mottle

  • Vacuum

Explanation

Question 23 of 38

1

The disadvantage of a small target angle is:

Select one of the following:

  • Increased heat distribution & capacity

  • Greater field coverage

  • A greater anode heel effect

  • A more uniform radiographic density

Explanation

Question 24 of 38

1

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

Select one of the following:

  • 1 & 2 Only

  • 2 & 3 Only

Explanation

Question 25 of 38

1

Pitting of the anode commonly occurs:

Select one of the following:

  • Consistent low but very long exposures

  • Consistent single, high exposures

  • Failure to warm up the tube

  • All the Above

Explanation

Question 26 of 38

1

Anode melt might occur in a specific area on the anode due to:

Select one of the following:

  • The unit not being warmed up properly

  • Extended use

  • When the kVp is too high

  • When the stator fails & the rotor ceases to turn

Explanation

Question 27 of 38

1

The anode heel effect:

Select one of the following:

  • 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

Explanation

Question 28 of 38

1

The line focus principle:

Select one of the following:

  • Makes use of an angled cathode structure

  • Produces x-ray lines

  • Spreads the heat over a larger part if the anode

Explanation

Question 29 of 38

1

To best apply the anode heel effect, the anode should be placed towards which end of the body when performing an AP projection?

Select one of the following:

  • Towards the Knee

  • Towards the Hip

Explanation

Question 30 of 38

1

The vacuum created within the x-ray tube increase the efficiency of the tube's operation.

Select one of the following:

  • True
  • False

Explanation

Question 31 of 38

1

The cathode is the positive side of the x-ray tube.

Select one of the following:

  • True
  • False

Explanation

Question 32 of 38

1

The faster the anode rotation, the better the heat dissipation.

Select one of the following:

  • True
  • False

Explanation

Question 33 of 38

1

Many x-ray tubes have two filaments:

Select one of the following:

  • 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

Explanation

Question 34 of 38

1

Modern general purpose radiographic equipment uses a stationary anode.

Select one of the following:

  • True
  • False

Explanation

Question 35 of 38

1

The most common diagnostic radiography target angle is 12 degrees.

Select one of the following:

  • True
  • False

Explanation

Question 36 of 38

1

The anode disk is composed of several different materials.

Select one of the following:

  • True
  • False

Explanation

Question 37 of 38

1

Changing the angle of the anode will change the effective focal spot.

Select one of the following:

  • True
  • False

Explanation

Question 38 of 38

1

One way to extend tube life is by using high mA stations when possible.

Select one of the following:

  • True
  • False

Explanation

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