Question 1

A steeper target angle provides:

Accepted Answer

A)   more heat capacity.
B)   lower patient dose.
C)   less anode heel effect.
D)   smaller effective focal spot.

Question 2

Which of the following would be considered added filtration in the x-ray tube?

Accepted Answer

A)   Oil
B)   Pyrex glass
C)   Aluminum
D)   Tungsten

Question 3

When tungsten atoms are heated,their outermost electrons are moved out of the atom in space. This principle is called:

Accepted Answer

A)   electromagnetic induction.
B)   variable resistance.
C)   quantum theory.
D)   thermionic emission.

Question 4

The anode,or target,of the x-ray tube is ______ charged.

Accepted Answer

A)   positively
B)   negatively
C)   neutrally
D)   radioactively

Question 5

If an exposure time is measured as 35 milliseconds,what is the exposure time in seconds?

Accepted Answer

A)   0.350 seconds
B)   350 seconds
C)   0.035 seconds
D)   3.5 seconds

Question 6

The "electron cloud" that surrounds the hot cathode is referred to as a:

Accepted Answer

A)   focusing cup.
B)   photon.
C)   filament.
D)   space charge.

Question 7

Filtration ______ the average wavelength of the x-ray beam.

Accepted Answer

A)   increases
B)   decreases
C)   does not affect
D)   has no relation to

Question 8

The difference in x-ray intensity (or volume of x-rays) between the anode and the cathode side of the x-ray beam is:

Accepted Answer

A)   45%.
B)   60%.
C)   75%.
D)   80%.

Question 9

More than 99% of the energy applied to an x-ray tube is converted into:

Accepted Answer

A)   bremsstrahlung radiation.
B)   characteristic radiation.
C)   secondary radiation.
D)   heat.

Question 10

Most x-ray tubes in use today have a standard rotation speed of ______ rpm.

Accepted Answer

A)   1,500
B)   2,000
C)   3,600
D)   10,000

Question 11

The filament of an x-ray tube is made of:

Accepted Answer

A)   glass.
B)   a coil of copper wire.
C)   a coil of tungsten wire.
D)   a fluorescent tube.

Question 12

A smaller effective focal spot produces:

Accepted Answer

A)   greater tube heat capacity.
B)   lower patient dose.
C)   more characteristic radiation.
D)   greater image sharpness.

Question 13

The penetrating power of the x-ray beam is controlled by varying the:

Accepted Answer

A)   anode angle.
B)   anode speed.
C)   milliamperage.
D)   kilovoltage.

Question 14

The purpose of rotating the x-ray tube target is to:

Accepted Answer

A)   create a space charge.
B)   speed up the electrons in the electron stream.
C)   remove long wavelength photons from the x-ray beam.
D)   increase the heat capacity of the anode.

Question 15

When exposure time is very short,the time is usually measured in:

Accepted Answer

A)   milliseconds.
B)   deciseconds.
C)   kiloelectron volts.
D)   angstroms.

Question 16

What is the principal advantage of a high-speed rotating anode?

Accepted Answer

A)   More efficient production of x-rays
B)   Increased amount of characteristic radiation produced
C)   Increased amount of bremsstrahlung radiation produced
D)   More efficient heat dissipation

Question 17

The mAs used for an exposure determines the:

Accepted Answer

A)   wavelength of the resulting x-ray beam.
B)   quantity of radiation in the exposure.
C)   rate at which x-rays are produced.
D)   voltage across the x-ray tube.

Question 18

The precise area on the target where the x-rays strike is called the:

Accepted Answer

A)   focal track.
B)   focal spot.
C)   actual focal spot.
D)   effective focal spot.

Question 19

What percentage of the total energy applied to an x-ray tube target is converted into x-rays?

Accepted Answer

A)   1%
B)   50%
C)   75%
D)   99%

Question 20

An x-ray exposure is made using the following factors: 400 mA,0.02 sec,80 kVp,40 inches SID,and the large focal spot. What is the mAs for this exposure technique?

Accepted Answer

A)   0.08 mAs
B)   0.8 mAs
C)   8 mAs
D)   80 mAs

Exam 5: X-Ray Production

More than 99% of the energy applied to an x-ray tube is converted into:

Correct AnswerverifiedShow Answer

The penetrating power of the x-ray beam is controlled by varying the:

Correct AnswerverifiedShow Answer

A steeper target angle provides:

Correct AnswerverifiedShow Answer

If an exposure time is measured as 35 milliseconds,what is the exposure time in seconds?

Correct AnswerverifiedShow Answer

The difference in x-ray intensity (or volume of x-rays) between the anode and the cathode side of the x-ray beam is:

Correct AnswerverifiedShow Answer

When tungsten atoms are heated,their outermost electrons are moved out of the atom in space. This principle is called:

Correct AnswerverifiedShow Answer

What percentage of the total energy applied to an x-ray tube target is converted into x-rays?

Correct AnswerverifiedShow Answer

What is the principal advantage of a high-speed rotating anode?

Correct AnswerverifiedShow Answer

The anode,or target,of the x-ray tube is ______ charged.

Correct AnswerverifiedShow Answer

Filtration ______ the average wavelength of the x-ray beam.

Correct AnswerverifiedShow Answer

The "electron cloud" that surrounds the hot cathode is referred to as a:

Correct AnswerverifiedShow Answer

The precise area on the target where the x-rays strike is called the:

Correct AnswerverifiedShow Answer

The mAs used for an exposure determines the:

Correct AnswerverifiedShow Answer

When exposure time is very short,the time is usually measured in:

Correct AnswerverifiedShow Answer

An x-ray exposure is made using the following factors: 400 mA,0.02 sec,80 kVp,40 inches SID,and the large focal spot. What is the mAs for this exposure technique?

Correct AnswerverifiedShow Answer

The purpose of rotating the x-ray tube target is to:

Correct AnswerverifiedShow Answer

Most x-ray tubes in use today have a standard rotation speed of ______ rpm.

Correct AnswerverifiedShow Answer

Which of the following would be considered added filtration in the x-ray tube?

Correct AnswerverifiedShow Answer

The filament of an x-ray tube is made of:

Correct AnswerverifiedShow Answer

A smaller effective focal spot produces:

Correct AnswerverifiedShow Answer

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