Question 1

Because of the alternating current supplied to the x-ray tube it is considered to be _______.

Accepted Answer

self-rectified

Question 2

The amount of heat produced in the x-ray tube is ________ than the amount of radiation produced.

Accepted Answer

greater

Question 3

A diagnostic film is made at 10 mA and 4 impulses. The exposure that would produce the same image at 5 mA would be:

Accepted Answer

A) 5 impulses 
B) 10 impulses 
C) 8 impulses 
D) 45 impulses 
A) 5 impulses 
B) 10 impulses 
C) 8 impulses 
D) 45 impulses C

Question 4

If the useful beam is not centered on the film in the patient's mouth, the result will be:

Accepted Answer

A) foreshortening 
B) elongation 
C) collimator cutoff 
D) overlapping 
A) foreshortening 
B) elongation 
C) collimator cutoff 
D) overlapping

Question 5

Ionization occurs:

Accepted Answer

A) when an atom gains a neutron 
B) when the atom has no charge 
C) when an atom loses a proton 
D) when an atom loses an electron 
A) when an atom gains a neutron 
B) when the atom has no charge 
C) when an atom loses a proton 
D) when an atom loses an electron

Question 6

Identify the particles that compose the nucleus of an atom:

Accepted Answer

A) electrons and photons 
B) electrons and protons 
C) protons and neutrons 
D) neutrons 
A) electrons and photons 
B) electrons and protons 
C) protons and neutrons 
D) neutrons

Question 7

All of the following are properties of x-rays EXCEPT:

Accepted Answer

A) x-rays are invisible 
B) x-rays travel in wavy lines 
C) x-rays can penetrate structures 
D) x-rays can adversely affect human tissue 
A) x-rays are invisible 
B) x-rays travel in wavy lines 
C) x-rays can penetrate structures 
D) x-rays can adversely affect human tissue

Question 8

Examples of particulate radiation include:

Accepted Answer

A) alpha particles 
B) electrons 
C) neutrons 
D) all of the above 
A) alpha particles 
B) electrons 
C) neutrons 
D) all of the above

Question 9

The determination of the size and shape of the x-ray beam is called ________.

Accepted Answer

The answer of The determination of the size and shape...

Question 10

The thickness of aluminum that will reduce the intensity of the x-ray beam by 50% is termed:

Accepted Answer

A) half value layer 
B) filtration 
C) collimation 
D) penetrating power 
A) half value layer 
B) filtration 
C) collimation 
D) penetrating power

Question 11

The total x-ray energy produced by the collision of the electrons with the target inside the x-ray tube is approximately:

Accepted Answer

A) less than 1% 
B) 10%-20% 
C) 50% 
D) 99% 
A) less than 1% 
B) 10%-20% 
C) 50% 
D) 99%

Question 12

The target or focal spot in the x-ray tube can be found at the:

Accepted Answer

A) positively charged cathode 
B) positively charged anode 
C) negatively charged cathode 
D) negatively charged anode 
A) positively charged cathode 
B) positively charged anode 
C) negatively charged cathode 
D) negatively charged anode

Question 13

If a radiograph is described as "underpenetrated," then the error must be:

Accepted Answer

A) excessive kVp 
B) too little mA 
C) excessive mA 
D) too little kVp 
A) excessive kVp 
B) too little mA 
C) excessive mA 
D) too little kVp

Question 14

The release of electrons from the hot tungsten filament at the cathode is called the __________.

Accepted Answer

thermionic

Question 15

The quality of the x-ray photons is determined by the __________.

Accepted Answer

The answer of The quality of the x-ray photons is...

Question 16

Pointed, plastic cones are not used in dental radiology because:

Accepted Answer

A) the cones are difficult for the practitioner to line up correct anatomic structures 
B) the cones cause the production of excess secondary and scatter radiation 
C) the cones require a higher kVp setting on the control panel 
D) the cones require an increase in the time setting 
A) the cones are difficult for the practitioner to line up correct anatomic structures 
B) the cones cause the production of excess secondary and scatter radiation 
C) the cones require a higher kVp setting on the control panel 
D) the cones require an increase in the time setting

Question 17

Identify the physicist who discovered x-rays:

Accepted Answer

A) Hittorf-Crookes 
B) Roentgen 
C) Edison 
D) Kells 
A) Hittorf-Crookes 
B) Roentgen 
C) Edison 
D) Kells

Question 18

The quantity of x-ray photons produced is determined by the _________ setting.

Accepted Answer

The answer of The quantity of x-ray photons produced is...

Question 19

Collimator cutoff (cone cutting)is caused by:

Accepted Answer

A) improper horizontal angulation 
B) over filtration 
C) improper beam film alignment 
D) improper vertical angulation 
A) improper horizontal angulation 
B) over filtration 
C) improper beam film alignment 
D) improper vertical angulation

Question 20

Identify the metal used in the focal spot of the x-ray tube:

Accepted Answer

A) tungsten 
B) molybdenum 
C) copper 
D) iron 
A) tungsten 
B) molybdenum 
C) copper 
D) iron

Exam 1: Ionizing Radiation and Basic Principles of X-Ray Generation

Because of the alternating current supplied to the x-ray tube it is considered to be _______.

The amount of heat produced in the x-ray tube is ________ than the amount of radiation produced.

A diagnostic film is made at 10 mA and 4 impulses. The exposure that would produce the same image at 5 mA would be:

If the useful beam is not centered on the film in the patient's mouth, the result will be:

Ionization occurs:

Identify the particles that compose the nucleus of an atom:

All of the following are properties of x-rays EXCEPT:

Examples of particulate radiation include:

The determination of the size and shape of the x-ray beam is called ________.

The thickness of aluminum that will reduce the intensity of the x-ray beam by 50% is termed:

The total x-ray energy produced by the collision of the electrons with the target inside the x-ray tube is approximately:

The target or focal spot in the x-ray tube can be found at the:

If a radiograph is described as "underpenetrated," then the error must be:

The release of electrons from the hot tungsten filament at the cathode is called the __________.

The quality of the x-ray photons is determined by the __________.

Pointed, plastic cones are not used in dental radiology because:

Identify the physicist who discovered x-rays:

The quantity of x-ray photons produced is determined by the _________ setting.

Collimator cutoff (cone cutting)is caused by:

Identify the metal used in the focal spot of the x-ray tube:

The Dental X-Ray Machine

Image Formation

Image Receptors

Biologic Effects of Radiation

Patient Protection

Operator Protection

Film Processing: the Darkroom

Infection Control in Dental Practice

Intraoral Technique: the Paralleling Method

Accessory Radiographic Techniques: Bisecting Technique and Occlusal Projections

Panoramic Radiography

Extraoral Techniques

Radiography of the Temporomandibular Joint

Digital Imaging

Advanced Imaging Systems

Quality Assurance

Patient Management and Special Problems

Film Mounting and Radiographic Anatomy

Principles of Radiographic Interpretation

Caries and Periodontal Disease

Pulpal and Periapical Lesions

Developmental Disturbances of Teeth and Bone

Bone and Other Lesions

Legal Considerations

Filters