Question 1

Damage caused by ionizing x-radiation to genetic cells:

Accepted Answer

A)  affects only the person being x-rayed.
B)  can affect future generations.
C)  affects only the dental assistant.
D)  affects the cells of the eye, skin, and oral mucosa.

Question 2

One of the rules of radiation protection is to never stand closer than _____ feet from the x-ray unit during an exposure unless you are behind a barrier.

Accepted Answer

A)  2
B)  6
C)  10
D)  15

Question 3

The range of shades of gray between black and white on an image is called:

Accepted Answer

A)  contrast.
B)  density.
C)  sharpness.
D)  focus point.

Question 4

The _____ setting controls the penetrating power of the x-ray beam.

Accepted Answer

A)  impulse timer
B)  kilovolt setting
C)  milliamp setting
D)  all of the above

Question 5

The maximum permissible dose for an occupational worker for an individual 18 years old or over is ___ rems per year:

Accepted Answer

A)  3
B)  5
C)  1.25
D)  0.3

Question 6

Damage to which type of cell is passed on to future generations?

Accepted Answer

A)  Somatic cell
B)  Genetic cell
C)  Damage to either somatic cells or genetic cells is passed on to future generations
D)  Damage to neither somatic cells nor genetic cells is passed on to future generations

Question 7

The time lapse from x-ray exposure until noticeable damage occurs is known as:

Accepted Answer

A)  the latent period.
B)  chronic exposure.
C)  the cumulative period.
D)  none of the above.

Question 8

_____ will improve the sharpness of a radiographic image.

Accepted Answer

A)  A larger focal spot size
B)  Faster film
C)  Smaller film crystal size
D)  Movement of the patient

Question 9

The fuzzy or blurred area around an image is called the ____.It can be reduced by ____.

Accepted Answer

A)  distortion; limiting movement
B)  penumbra; limiting movement
C)  distortion; using fast film
D)  penumbra; using fast film

Question 10

The uses of dental images include the detection of:

Accepted Answer

A)  incipient occlusal lesions.
B)  periodontal probing depths.
C)  bone loss in its early stages.
D)  percussion sensitivity as part of endodontic evaluation.

Question 11

Thermionic emission refers to the:

Accepted Answer

A)  release of electrons from the tungsten filament.
B)  ions formed in the x-ray tube by the loss of electrons.
C)  change in filament resistance due to heating.
D)  slamming of electrons against the target.

Question 12

Which of the following is an example of cumulative radiation exposure?

Accepted Answer

A)  Cataracts
B)  Leukemia
C)  Cancer
D)  All of the above

Question 13

The location where x-rays are produced in the x-ray tube is called the:

Accepted Answer

A)  focal spot.
B)  filament.
C)  window.
D)  PID.

Question 14

Dental imaging:

Accepted Answer

A)  refers to film-based images.
B)  refers to digitally produced images.
C)  detects conditions that might otherwise remain undetected.
D)  all of the above.

Question 15

Which council determines the radiation effects and levels tolerable for humans?

Accepted Answer

A)  American Dental Association (Council on Radiation Safety) 
B)  American Dental Association (Council on Dental Materials) 
C)  National Council on Radiation Protection and Measurements
D)  All of these groups make recommendations.

Question 16

A(n)  _____ is a minute bundle of energy that has no weight or mass.

Accepted Answer

A)  ion
B)  atom
C)  photon
D)  electron

Question 17

Which component of the x-ray machine functions in positioning the tubehead?

Accepted Answer

A)  Kilovoltage selector
B)  Control panel
C)  Extension arm
D)  Cathode

Question 18

Because the entire x-ray area is considered a radiation hazard area,a radiation hazard sign must be posted in:

Accepted Answer

A)  sight of patients.
B)  sight of personnel.
C)  the doctor's private office.
D)   both a and b.

Exam 38: Foundations of Radiography, Radiographic Equipment, and Radiation Safety

Which of the following is an example of cumulative radiation exposure?

Correct Answer
verified

Dental imaging:

Correct Answer
verified

Damage to which type of cell is passed on to future generations?

Correct Answer
verified

The uses of dental images include the detection of:

Correct Answer
verified

_____ will improve the sharpness of a radiographic image.

Correct Answer
verified

One of the rules of radiation protection is to never stand closer than _____ feet from the x-ray unit during an exposure unless you are behind a barrier.

Correct Answer
verified

Damage caused by ionizing x-radiation to genetic cells:

Correct Answer
verified

The _____ setting controls the penetrating power of the x-ray beam.

Correct Answer
verified

The fuzzy or blurred area around an image is called the .It can be reduced by .

Correct Answer
verified

Which component of the x-ray machine functions in positioning the tubehead?

Correct Answer
verified

The time lapse from x-ray exposure until noticeable damage occurs is known as:

Correct Answer
verified

The location where x-rays are produced in the x-ray tube is called the:

Correct Answer
verified

Which council determines the radiation effects and levels tolerable for humans?

Correct Answer
verified

The range of shades of gray between black and white on an image is called:

Correct Answer
verified

The maximum permissible dose for an occupational worker for an individual 18 years old or over is ___ rems per year:

Correct Answer
verified

Because the entire x-ray area is considered a radiation hazard area,a radiation hazard sign must be posted in:

Correct Answer
verified

Thermionic emission refers to the:

Correct Answer
verified

A(n) _____ is a minute bundle of energy that has no weight or mass.

Correct Answer
verified

Exam 38: Foundations of Radiography, Radiographic Equipment, and Radiation Safety

Which of the following is an example of cumulative radiation exposure?

Correct AnswerverifiedShow Answer

Dental imaging:

Correct AnswerverifiedShow Answer

Damage to which type of cell is passed on to future generations?

Correct AnswerverifiedShow Answer

The uses of dental images include the detection of:

Correct AnswerverifiedShow Answer

_____ will improve the sharpness of a radiographic image.

Correct AnswerverifiedShow Answer

One of the rules of radiation protection is to never stand closer than _____ feet from the x-ray unit during an exposure unless you are behind a barrier.

Correct AnswerverifiedShow Answer

Damage caused by ionizing x-radiation to genetic cells:

Correct AnswerverifiedShow Answer

The _____ setting controls the penetrating power of the x-ray beam.

Correct AnswerverifiedShow Answer

The fuzzy or blurred area around an image is called the ____.It can be reduced by ____.

Correct AnswerverifiedShow Answer

Which component of the x-ray machine functions in positioning the tubehead?

Correct AnswerverifiedShow Answer

The time lapse from x-ray exposure until noticeable damage occurs is known as:

Correct AnswerverifiedShow Answer

The location where x-rays are produced in the x-ray tube is called the:

Correct AnswerverifiedShow Answer

Which council determines the radiation effects and levels tolerable for humans?

Correct AnswerverifiedShow Answer

The range of shades of gray between black and white on an image is called:

Correct AnswerverifiedShow Answer

The maximum permissible dose for an occupational worker for an individual 18 years old or over is ___ rems per year:

Correct AnswerverifiedShow Answer

Because the entire x-ray area is considered a radiation hazard area,a radiation hazard sign must be posted in:

Correct AnswerverifiedShow Answer

Thermionic emission refers to the:

Correct AnswerverifiedShow Answer

A(n) _____ is a minute bundle of energy that has no weight or mass.

Correct AnswerverifiedShow Answer

Correct Answer
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The fuzzy or blurred area around an image is called the .It can be reduced by .

Correct Answer
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Correct Answer
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Correct Answer
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