Question 1

The x-ray beam formed at the focal spot is monochromatic.

Accepted Answer

A) True 
 B)False  False

Question 2

Increasing the amperage will result in a production of more x-rays.

Accepted Answer

A) True 
 B)False  True

Question 3

Electricity is defined as electrons in motion.

Accepted Answer

A) True 
 B)False  True

Question 4

What is the name of the device that allows the amount of current passing through the wires of the circuit to be changed?

Accepted Answer

The milliamperage (mA) selecto

Question 5

Why are the extension arm and yoke of the x-ray machine insulated?

Accepted Answer

All sections of the extension

Question 6

The collimator is a lead diaphragm that restricts the dimensions of the useful beam.

Accepted Answer

A) True 
 B)False

Question 7

Voltage is the measurement of the number of electrons moving through a wire conductor.

Accepted Answer

A) True 
 B)False

Question 8

Inside the dental x-ray machine, what does the speed of the electrons determine?

Accepted Answer

The energy (penetrat

Question 9

The tungsten anode is embedded in a core of copper to conduct heat away to a radiator.

Accepted Answer

A) True 
 B)False

Question 10

What is the term for the measurement of the number of electrons moving through a wire conductor?

Accepted Answer

Amperage measures th

Question 11

Increasing which of the following would best increase the number of electrons flowing through the dental x-ray electrical circuit?

Accepted Answer

A)  Impulses 
B)  Kilovoltage 
C)  Milliamperage 
D)  PID length 
A)  Impulses 
B)  Kilovoltage 
C)  Milliamperage 
D)  PID length

Question 12

The duration of an x-ray exposure is determined by which control?

Accepted Answer

A)  The timer 
B)  The line switch 
C)  The kVp selector 
D)  The mA selector 
A)  The timer 
B)  The line switch 
C)  The kVp selector 
D)  The mA selector

Question 13

Each of the following conditions must exist for x-rays to be produced EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  A target capable of stopping the electrons 
B)  An air-filled glass tube 
C)  High voltage to impart speed to the electrons 
D)  A source of free electrons 
A)  A target capable of stopping the electrons 
B)  An air-filled glass tube 
C)  High voltage to impart speed to the electrons 
D)  A source of free electrons

Question 14

Who is responsible for the radiation dose incurred by the patient during x-ray exposure?

Accepted Answer

Although a dentist prescribes

Question 15

What does adjusting the kilovolt peak (kVp) do?

Accepted Answer

Changes the penetrating ability of the x

Question 16

A 1/10-second exposure equals how many impulses?

Accepted Answer

A)  4 
B)  6 
C)  10 
D)  60 
A)  4 
B)  6 
C)  10 
D)  60

Question 17

The filament and target are made out of tungsten because it:

Accepted Answer

A)  produces fewer electrons. 
B)  prevents electrons from being liberated. 
C)  withstands high temperatures. 
D)  ensures that x-rays are projected in one direction. 
A)  produces fewer electrons. 
B)  prevents electrons from being liberated. 
C)  withstands high temperatures. 
D)  ensures that x-rays are projected in one direction.

Question 18

Which transformer corrects minor fluctuations in the current flowing through the wires?

Accepted Answer

A)  The step-up transformer 
B)  The step-down transformer 
C)  The autotransformer 
A)  The step-up transformer 
B)  The step-down transformer 
C)  The autotransformer

Question 19

A small area on the tungsten target of the anode toward which the electron beam is directed is called the "focal spot."

Accepted Answer

A) True 
 B)False

Question 20

Which regulating device on the control panel measures the amount of current passing through the wires of the circuit?

Accepted Answer

A)  The timer 
B)  The line switch 
C)  The kVp selector 
D)  The mA selector 
A)  The timer 
B)  The line switch 
C)  The kVp selector 
D)  The mA selector

Exam 3: The Dental X-Ray Machine: Components and Function

The x-ray beam formed at the focal spot is monochromatic.

Increasing the amperage will result in a production of more x-rays.

Electricity is defined as electrons in motion.

What is the name of the device that allows the amount of current passing through the wires of the circuit to be changed?

Why are the extension arm and yoke of the x-ray machine insulated?

The collimator is a lead diaphragm that restricts the dimensions of the useful beam.

Voltage is the measurement of the number of electrons moving through a wire conductor.

Inside the dental x-ray machine, what does the speed of the electrons determine?

The tungsten anode is embedded in a core of copper to conduct heat away to a radiator.

What is the term for the measurement of the number of electrons moving through a wire conductor?

Increasing which of the following would best increase the number of electrons flowing through the dental x-ray electrical circuit?

The duration of an x-ray exposure is determined by which control?

Each of the following conditions must exist for x-rays to be produced EXCEPT one. Which one is the EXCEPTION?

Who is responsible for the radiation dose incurred by the patient during x-ray exposure?

What does adjusting the kilovolt peak (kVp) do?

A 1/10-second exposure equals how many impulses?

The filament and target are made out of tungsten because it:

Which transformer corrects minor fluctuations in the current flowing through the wires?

A small area on the tungsten target of the anode toward which the electron beam is directed is called the "focal spot."

Which regulating device on the control panel measures the amount of current passing through the wires of the circuit?

Dental Radiography: Historical Perspective and Future Trends

Characteristics and Measurement of Radiation

Factors Affecting Radiographic Quality

Effects of Radiation Exposure

Radiation Protection

Dental X-Ray Film and Processing Methods

Digital Radiography and Image Acquisition

Infection Control

Legal and Ethical Responsibilities

Patient Relations and Education

Introduction to Radiographic Examinations

The Periapical Examinationparalleling Technique

The Periapical Examinationbisecting Technique

The Bitewing Examination

The Occlusal Examination

The Panoramic Examination

Identifying and Correcting Undiagnostic Radiographs

Quality Control and Environmental Safety in Dental Radiography

Image Orientation and Introduction to Interpretation

Recognizing Normal Radiographic Anatomy Intraoral Radiographs

Recognizing Normal Radiographic Anatomy Panoramic Radiographs

Radiographic Appearance of Dental Materials and Foreign Objects

The Use of Radiographs in the Detection of Dental Caries

The Use of Radiographs in the Evaluation of Periodontal Diseases

Describing Radiographic Anomalies, Lesions, and Opportunistic Screening

Pediatric Radiographic Techniques

Radiographic Techniques for Patients With Special Needs

Radiographic Techniques for Specific Oral Conditions

Radiographic Techniques

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