Question 1

The cathode filament is made of:

Accepted Answer

A)   tungsten.
B)   rhenium.
C)   molybdenum.
D)   lead.
E)   nickel.F) None of the above
G) B) and E)

Question 2

Doubling mA results in:

Accepted Answer

A)   doubling the tube current.
B)   doubling the quantity of x-ray photons.
C)   doubling the thermionic emission.
D)   all of the above.E) A) and D)
F) A) and C)

Question 3

What focal spot size is measured directly under the anode target?

Accepted Answer

A)   Actual focal spot
B)   Target focal spot
C)   Filament focal spot
D)   Effective focal spotE) B) and C)
F) B) and D)

Question 4

In order to produce x-rays,electrons must be:

Accepted Answer

A)   suddenly decelerated.
B)   accelerated.
C)   liberated from the cathode filament.
D)   all of the above.E) A) and B)
F) A) and C)

Question 5

The advantage to having a focal track is that:

Accepted Answer

A)   the focal spot will be smaller.
B)   the focal spot will be larger.
C)   lower exposure factors can be used.
D)   higher exposure factors can be used.E) B) and C)
F) All of the above D

Question 6

What is the name of the device in a rotating anode x-ray tube that turns the rotor?

Accepted Answer

A)   Stator
B)   Rotor
C)   Focusing cup
D)   RheostatE) A) and D)
F) A) and C)

Question 7

X-ray tubes operating above 70 kVp must have total filtration of at least _________ of aluminum,or its equivalent.

Accepted Answer

A)   0.5 mm
B)   1 mm
C)   2 mm
D)   2.5 mmE) A) and D)
F) None of the above

Question 8

Setting identical exposure factors,which type of x-ray unit will produce the greatest heat?

Accepted Answer

A)   Single phase
B)   Double phase
C)   Three phase
D)   High frequencyE) C) and D)
F) A) and B)

Question 9

The wide range of energies in the x-ray beam is known as the:

Accepted Answer

A)   homoenergetic spectrum.
B)   x-ray emission spectrum.
C)   gamma ray emission spectrum.
D)   x-ray transmission spectrum.E) A) and B)
F) All of the above

Question 10

Which of the following could be defined as the production of an x-ray photon by a collision between the incident electron and a K-shell electron of the tungsten atom?

Accepted Answer

A)   Photoelectric interaction
B)   Bremsstrahlung interaction
C)   Characteristic interaction
D)   Pair production interactionE) A) and C)
F) All of the above C

Question 11

Tungsten has a ________ atomic number and a _________ melting point.

Accepted Answer

A)   low; low
B)   low; high
C)   high; low
D)   high; highE) All of the above
F) C) and D)

Question 12

What is the base material of the anode disk?

Accepted Answer

A)   Molybdenum
B)   Tungsten
C)   Rhenium
D)   Graphite
E)   A and BF)  A and DG) A) and E)
H) D) and F)

Question 13

The device that nearly surrounds the filament is the:

Accepted Answer

A)   rotor.
B)   focusing cup.
C)   stator.
D)   anode.E) A) and B)
F) All of the above B

Question 14

As kVp increases,beam penetrability ___________.

Accepted Answer

A)   increases
B)   decreases
C)   stays the sameD) A) and B)
E) A) and C)

Question 15

The amount the voltage varies during an x-ray exposure is known as:

Accepted Answer

A)   kVp.
B)   voltage ripple.
C)   mA.
D)   tube current.E) None of the above
F) A) and D)

Question 16

As compared to glass,which of the following is an advantage to having a metal envelope x-ray tube?

Accepted Answer

A)   Decrease in off-focus radiation
B)   Increase in off-focus radiation
C)   Increased deposits of tungsten on the inside surface of the envelope
D)   A and CE) A) and B)
F) All of the above

Question 17

Inside the x-ray tube envelope you will find:

Accepted Answer

A)   oil.
B)   air.
C)   A and B.
D)   none of the above.E) A) and B)
F) C) and D)

Question 18

The x-ray beam produced with 120 kVp will consist primarily of x-rays produced by bremsstrahlung interactions.

Accepted Answer

A) True 
 B)False

Question 19

Decreasing the exposure time results in:

Accepted Answer

A)   fewer x-ray photons.
B)   more x-ray photons.
C)   higher photon energy.
D)   lower photon energy.E) C) and D)
F) B) and D)

Question 20

When electrons strike the anode target,their kinetic energy is converted into ___% heat and ___% x-rays:

Accepted Answer

A)   1; 99
B)   99; 1
C)   0; 100
D)   100; 0
E)   50; 50F) None of the above
G) C) and E)

Exam 2: The X-Ray Beam

The cathode filament is made of:

Correct AnswerverifiedShow Answer

Doubling mA results in:

Correct AnswerverifiedShow Answer

What focal spot size is measured directly under the anode target?

Correct AnswerverifiedShow Answer

In order to produce x-rays,electrons must be:

Correct AnswerverifiedShow Answer

The advantage to having a focal track is that:

Correct AnswerverifiedD

What is the name of the device in a rotating anode x-ray tube that turns the rotor?

Correct AnswerverifiedShow Answer

X-ray tubes operating above 70 kVp must have total filtration of at least _________ of aluminum,or its equivalent.

Correct AnswerverifiedShow Answer

Setting identical exposure factors,which type of x-ray unit will produce the greatest heat?

Correct AnswerverifiedShow Answer

The wide range of energies in the x-ray beam is known as the:

Correct AnswerverifiedShow Answer

Which of the following could be defined as the production of an x-ray photon by a collision between the incident electron and a K-shell electron of the tungsten atom?

Correct AnswerverifiedC

Tungsten has a ________ atomic number and a _________ melting point.

Correct AnswerverifiedShow Answer

What is the base material of the anode disk?

Correct AnswerverifiedShow Answer

The device that nearly surrounds the filament is the:

Correct AnswerverifiedB

As kVp increases,beam penetrability ___________.

Correct AnswerverifiedShow Answer

The amount the voltage varies during an x-ray exposure is known as:

Correct AnswerverifiedShow Answer

As compared to glass,which of the following is an advantage to having a metal envelope x-ray tube?

Correct AnswerverifiedShow Answer

Inside the x-ray tube envelope you will find:

Correct AnswerverifiedShow Answer

The x-ray beam produced with 120 kVp will consist primarily of x-rays produced by bremsstrahlung interactions.

Correct AnswerverifiedShow Answer

Decreasing the exposure time results in:

Correct AnswerverifiedShow Answer

When electrons strike the anode target,their kinetic energy is converted into ___% heat and ___% x-rays:

Correct AnswerverifiedShow Answer

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D

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C

Tungsten has a atomic number and a _ melting point.

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B

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When electrons strike the anode target,their kinetic energy is converted into _% heat and _% x-rays:

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