Part3 Dental Imagery (100-149) Prof. Pen Nun
100. ដំណាក់កាលទី៥នៃការលាងហ្វិលគឺ:
Developing
Fixing
Washing
Drying
101. X-rays and Gamma rays are a form of:
Light
Particle radiation
Electromagnetic radiation
All are corrects
102. Undercut is the loss of resolution at a sharp, thickness transition area due to:
Scattering within the part
Backscatter
Sidescatter
Scattering within the film
103. Image quality indicators (IQIs) provide information about the level of:
Resolution and contrast sensitivity
Resolution and film latitude
Contrast sensitivity and latitude
Contrast sensitivity only
104. The number of X-ray or Gamma photons that are transmitted through a material depends on the:
Energy of the photons
Thickness of the material
Atomic number of the material
All of the above
105. Bremsstrahlung production of X-rays produces radiation that is composed of:
A small number of very defined energies
A continuous spectrum of energies over some range
Radiation of only one energy
None of the above
106. Which two types of radiation-matter interactions account for the majority of attenuation in typical industrial radiography? :
Compton Scattering and photoelectric absorption
Compton Scattering and pair production
Pair production and photoelectric absorption
None of the above
107. X-ray generators produce radiation through:
Bremsstrahlung processes
K-shell emmission processes
Radioactive decay
Bremsstrahlung processes and K-shell emmission processes
108. Radiation beam filters are sometime used in X-ray radiography to:
Remove some of the low energy radiation to increase definition
To remove some of the low energy radiation to increase contrast sensitivity
Remove some of the low energy radiation to reduce definition
All are corrects
109. Lowering the energy of the radiation used to produce a radiograph will generally result in:
Less latitude
Higher contrast sensitivity
A Longer exposure time
All of the above
110. Radiographic contrast describe:
The sharpness of lines in a radiograph
The differences in photographic density in a radiograph
The average photographic density in a radiograph
The difference in density between two different radiographs
111. A specific radioactive source will always produce gamma rays at the same:
Intensity
Activity
Energy levels
None of the above
112. X-rays and Gamma rays:
Always travel in a straight line
Can be influenced by an electrical field
Can be influenced by a magnetic field
None of the above
113. X-rays and Gamma rays are often referred to as photons because:
They possess a charge
They have mass
They occur as small packets of energy
None of the above
114. Newtons Inverse Square Law is useful in radiography because it indicates how the radiation intensity is affected by:
Radioactive decay
Distance from the source
The size of the source
None of the above
115. The main advantage of real-time radiography over film is:
Higher image contrast sensitivity
Inspection can be performed more rapidly
Higher image definition
Lower equipment costs
116. Higher energy radiation will have more:
Speed
Incident Intensity
Penetrating power
Incident Intensity and Penetrating power
117. Image quality indicators are usually placed:
Anywhere on the back side of the film
On the front side of the film near the primary area of interest
On the front side of the test component in an area of similar thickness to the primary area of interest
On the back side of the test component in the area of interest
118. Exposure to ionizing radiation can be limited:
With the use of shielding
By increasing distance form the source
By limiting the time exposed to the radiaiton
All of the above
119. The Film contrast is determined by:
Type of film used
Process by which the film was developed
Radiation energy used
Type of film used and the process by which the film was developed
120. Collimators are used to:
Reduce the radiation beam spread
Filter the radiation beam
Increase film latitude
Decrease film latitude
121. Stationary lab or shop X-ray systems usually rely on what to limit exposure to the radiation?:
Distance controls
Time limits
Shielding
All of the above
122. The amount of geometric unsharpness in a radiograph is affected by:
The source to film distance
The source to object distance
The size of the source
All of the above
123. X-rays and Gamma rays:
Are both affected by radioactive decay
Are both produced by a radioactive atom
Have completely different properties
Differ only in their source
124. Radiographic inspection should be used for crack detection only when:
The crack is large
The test componet is a casting
The test component is a weldment
The orientation of the crack is known
125. Who is given credit for the discovery of radioactive materials?:
Henri Becquerel
Wilhelm Roentgen
Marie Curie
Pierre Curie
126. Unexposed X-ray film is comprised of a plastic, transparent base coated with an emulsion containing radiation-sensitive particle known as:
Metalic silver crystals
Silver halide grains
Metalic silver crystals AND Silver halide grains
Neither Metalic silver crystals and Silver halide grains
127. Manmade sources of radioactive sources are produced by:
By splitting the nucleus of atoms in the source material
Adding electrons to the source material
Introducing an extra neutron to the atoms of the source material
None of the above
128. In dental radiography, the quality of the x-ray beam is controlled by:
Kilovoltage peak
Milliamperage
Exposure time
Source-to-receptor distance
129. A higher kilovoltage produces x-rays with:
Greater energy levels
Shorter wavelengths
More penetrating ability
All of the above
130. Identify the unit of measurement used to describe the amount of electric current flowing through the x-ray tube:
Volt
Ampere
Kilovoltage peak
Force
131. Radiation produced with high kilovoltage results in:
Short wavelengths
Long wavelengths
Less penetrating radiation
Lower energy levels
132. In dental radiography, the quantity of radiation produced is controlled by:
Kilovoltage peak
Milliamperage
Exposure time
Milliamperage and exposure time
133. Increasing milliamperage results in an increase in:
Temperature of the filament
Mean energy of the beam
Number of x-rays produced
Temperature of the filament and number of x-rays produced
134. Identify the milliamperage range for dental radiography:
1 to 5 mA
4 to 10 mA
7 to 15 mA
Greater than 15 mA
135. The overall blackness or darkness of an image is termed:
Contrast
Density
Overexposure
Polychromatic
136. If kilovoltage is decreased with no other variations in exposure factors, the resultant image will:
Appear lighter
Appear darker
Remain the same
All are corrects
137. Identify the term that describes how dark and light areas are differentiated on an image:
Contrast
Density
Intensity
Polychromatic
138. A radiograph that has many light and dark areas with few shades of gray is said to have:
High density
Low density
High contrast
Low contrast
139. The total energy contained in the x-ray beam in a specific area at a given time is termed:
Kilovoltage peak
Beam quality
Intensity
140. A beam of energy that has the power to penetrate substances and record image shadows on photographic film.:
X-ray
X-radiation
Radiography
Radiograph
141. Coolidge:
Discovered x-rays
Developed first x-ray tube
Introduced bisecting technique
Exposed first dental radiograph
142. Fitzgerald:
Developed first x-ray tube
Wrote first paper on the danger of x-radiation
Exposed first dental radiograph in United States (skull)
Introduced long-cone paralleling technique
143. Kells:
Exposed first dental radiograph in United States (skull)
Introduced long-cone paralleling technique
Wrote first dental text; introduced bite-wing technique
Exposed first dental radiograph in United States (living patient)
144. The components of xray machine is:
Tubehead
Extension arm
Control panel
All are corrects
145. The components of xray film is:
Film base
Adhesive layer
Film emulsion, and protective layer
All are corrects
146. The types of film used in dental radiography is:
Intraoral film
Extraoral film
Duplicating film
All are corrects
147. The steps in film processing is:
Development
Fixation and rinsing
Washing, and drying
All are corrects
148. Chemical solution used in development process to reduce the exposed, energized silver halide crystals:
Developer
Washing
Drying
All are corrects
149. The developer solution basic ingredients is:
Developing agent
Preservative
Accelerator, and
Restrainer
All are corrects
{"name":"Part3 Dental Imagery (100-149) Prof. Pen Nun", "url":"https://www.quiz-maker.com/Q0A5VZ3SN","txt":"100. ដំណាក់កាលទី៥នៃការលាងហ្វិលគឺ:, 101. X-rays and Gamma rays are a form of:, 102. Undercut is the loss of resolution at a sharp, thickness transition area due to:","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}