Radiology Mid Exam
.
- 1.
The "p" in kVp stands for
- A.
Percentage
- B.
Parallel
- C.
Peak
- D.
Punitive
- E.
Paired
Correct Answer
C. Peak -
- 2.
In the x-ray tubehead , " dissipate the heat away from tungesten target " function of :
- A.
Molybdenum cup
- B.
Tubehead seal
- C.
Copper stem
- D.
Insulating oil
Correct Answer
C. Copper stem -
- 3.
Which type of x-ray account for 70%of all the x-ray energy produced at the anode ?
- A.
Characteristic radiation
- B.
General radiation
- C.
Primary radiation
- D.
Compton scatter
- E.
Coherent scatter
Correct Answer
B. General radiation -
- 4.
The cathode and anode are parts of an x-ray tube. The anode is negatively charged.
- A.
The first statement is correct. The second statement is wrong
- B.
The first statement is wrong. The second statement is correct
- C.
Both the statements are correct
- D.
Both the statements are wrong
Correct Answer
A. The first statement is correct. The second statement is wrong -
- 5.
Type of film holders used during root canal procedures :
- A.
XCP Bite-Block
- B.
Snap-A-Ray
- C.
Masel Orthodontics
- D.
EndoRay
- E.
Uni-bite
Correct Answer
D. EndoRay -
- 6.
The 8-inch PID is less effective than 16-inch PID in reducing radiation exposure of the patient
- A.
True
- B.
False
Correct Answer
A. True -
- 7.
An example of an electro-magnetic radiation is
- A.
Alpha rays
- B.
Beta rays
- C.
Cathode rays
- D.
Gamma rays
Correct Answer
D. Gamma rays -
- 8.
" Cathode " in a X-ray tube is
- A.
A)- source of electrons
- B.
B)- A target
- C.
C)- Negatively charged
- D.
A and c
- E.
All of the above
Correct Answer
A. A)- source of electrons -
- 9.
Which is the purpose of dental x-ray machine filtration ?
- A.
Decrease beam intensity
- B.
Reduce the size of the x-ray beam
- C.
Regulate the shape of the x-ray beam
- D.
Eliminate low-energy photons
Correct Answer
D. Eliminate low-energy photons -
- 10.
Which one of the following is characteristic of rectangular PID :
- A.
A)-appears as a closed , pointed plastic cone
- B.
B)-most effective in reducing patient exposure
- C.
C)-no longer used in dentistry
- D.
D)-produce scatter radiation
- E.
A and c
Correct Answer
B. B)-most effective in reducing patient exposure -
- 11.
All dental x-ray machines manufactured after :
- A.
1984
- B.
1874
- C.
1947
- D.
1974
Correct Answer
D. 1974 -
- 12.
Double-ended instrument that hold the film between two plastic grips :
- A.
Stabe Bite-Block
- B.
Uni-bite
- C.
Snap-A-ray film holder
- D.
Orthophos XGPlus
- E.
Non of the above
Correct Answer
C. Snap-A-ray film holder -
- 13.
A form of energy carried by waves or a stream of particles:
- A.
Radiology
- B.
Radiograph
- C.
Dental Radiograph
- D.
Radiation
- E.
X-RAY
Correct Answer
D. Radiation -
- 14.
The primary parts of an atom are:
- A.
Proton, nutrino, electron
- B.
Proton, electron, gamma ray
- C.
Photon, electron, neutron
- D.
Proton, electron, neutron
Correct Answer
D. Proton, electron, neutron -
- 15.
Most of the energy of the electrons from the cathode is converted to :
- A.
X-rays
- B.
Scatter
- C.
Heat
- D.
Primary beam
Correct Answer
C. Heat -
- 16.
Name the following intraoral radiograph
- A.
Periapical radiograph
- B.
Bitewing radiograph
- C.
Occlusal radiograph
- D.
Biteblock radiograph
Correct Answer
A. Periapical radiograph -
- 17.
Which of the following describe Lead foil sheet :
- A.
Protect the film from exposure to light and saliva
- B.
Give the film greater sensitivity to X-radiation
- C.
Protect film from backscattered (secondry) radiation
- D.
Contributes to rigidity of packet
- E.
Two of the above is right
- F.
Non of the above
Correct Answer
E. Two of the above is right -
- 18.
Most frequently used bite-wing film is :
- A.
The standard film ( size2 periapical film )
- B.
Size 4 bite-wing film
- C.
The film that used to examine the posterior teeth in adults
- D.
The size 3 film
- E.
Non of the above
Correct Answer
C. The film that used to examine the posterior teeth in adults -
- 19.
The correct relations between crystal size , film speed and image details is :
- A.
Large crystal > high speed > more details
- B.
Large crystal > low speed > less details
- C.
Small crystal >low speed > less details
- D.
Small crystal > low speed > more details
Correct Answer
D. Small crystal > low speed > more details -
- 20.
A dental patient has thick soft tissues and dense bone , to compensate for this increase in subject thickness and to provide an image of diagnostic density , the dental radiographer may do all of the following except :
- A.
Increase the mA
- B.
Decrease focal spot size
- C.
Increase exposure time
- D.
Increase kVp
Correct Answer
B. Decrease focal spot size -
- 21.
Decrease the operating kilovoltage peak will cause :
- A.
An increase in density ; the image appears darker
- B.
An increase in density ; the image appears lighter
- C.
A decrease in density ; the image appears darker
- D.
A decrease in density ; the image appears lighter
Correct Answer
D. A decrease in density ; the image appears lighter -
- 22.
The heart of the x ray generating system is
- A.
Position indicating device PID
- B.
Lead collimator
- C.
Metal housing
- D.
Transformer
- E.
X ray tube
Correct Answer
E. X ray tube -
- 23.
Which of the following statement is true ?
- A.
Small lymphocytes consider one of the least susceptible to ionizing radiation
- B.
The last event in the sequence of radiation injury is latent period
- C.
Direct theory of radiation injury suggests that cell damage result when ionizing radiation directly hits critical area
- D.
Long term effects are seen with small amount of radiation absorbed in short period
Correct Answer
C. Direct theory of radiation injury suggests that cell damage result when ionizing radiation directly hits critical area -
- 24.
Conventional calcium tungeston screen require less x ray expure than do rare earth screen
- A.
True
- B.
False
Correct Answer
B. False -
- 25.
The SI unit for measuring radiation exposure by determining the amount of ionization that occurs in the air is termed :
- A.
Gray ( Gy )
- B.
Coulombs per kilogram ( C/Kg )
- C.
Sievert ( Sv )
- D.
Roentgen ( R )
- E.
Radiation absorbed dose ( rad )
Correct Answer
D. Roentgen ( R ) -
- 26.
By switching your film from E-speed to F-speed , you can reduce your's patient's radiation exposure by :
- A.
30%
- B.
40%
- C.
50%
- D.
60%
Correct Answer
A. 30% -
- 27.
Identify the milliamperage range for dental radiography :
- A.
1 to 5 mA
- B.
4 to 10 mA
- C.
7 to 15 mA
- D.
Greater than 15mA
Correct Answer
C. 7 to 15 mA -
- 28.
Increasing which of these four influencing factor will increase the density of the dental radiograph image : 1)kilovoltage , 2)milliamperage , 3)exposure time , 4)subject thickness ?
- A.
1 and 2
- B.
2 and 3
- C.
1,2 and 3
- D.
1,2,3 and 4
Correct Answer
C. 1,2 and 3 -
- 29.
Which of the following is consider radio-resistant ?
- A.
Blood cells
- B.
Small lymphocyte
- C.
Young bone cells
- D.
Mature bone cells
- E.
Immature reproductive cells
- F.
Non of the above
Correct Answer
D. Mature bone cells -
- 30.
Which of the following describes secondary radiation ?
- A.
Radiation that exist the tubehead
- B.
Radiation that is created when x-rays come in contact with matter
- C.
Radiation that has been deflected from its path by the interaction with matter
- D.
None of the above
Correct Answer
B. Radiation that is created when x-rays come in contact with matter -
- 31.
The film emulsion is softens during :
- A.
Development
- B.
Fixing
- C.
Rinsing
- D.
Washing
- E.
Drying
Correct Answer
A. Development -
- 32.
In the developer composition ,which of the following is the function of Accelerator :
- A.
Provides the alkaline environment for the developing agents
- B.
Prevents the developer from developing the unexposed silver halide crystals
- C.
Prevent oxidation of the developing agents
- D.
Neutralizes the alkaline developer and stops further development
Correct Answer
A. Provides the alkaline environment for the developing agents -
- 33.
The optimal developing temperature for manual processing is :
- A.
55 F
- B.
78 F
- C.
68 F
- D.
80 F
Correct Answer
C. 68 F -
- 34.
Regarding processing problem and solution , which of the following is mismatches :
- A.
1)developer spots - black spots
- B.
2)underdeveloped film - dark appearance
- C.
3)fogged film - gray , lack of detail and contrast
- D.
4)fixer cutoff - straight white border
- E.
1 and 4
- F.
2 and 4
- G.
1 , 2 and 4
- H.
All of the above
Correct Answer
F. 2 and 4 -
- 35.
Which of the following statements is incorrect ?
- A.
X-rays cause ionization
- B.
X-rays have more energy than dose visible light
- C.
X-rays have no charge
- D.
X-rays travel at the speed of sound
Correct Answer
D. X-rays travel at the speed of sound -
- 36.
The response of a cells to radiation exposure is determined by :
- A.
Mitotic activity
- B.
Cell differentiation
- C.
Cell metabolism
- D.
All of the above
Correct Answer
D. All of the above -
- 37.
The correct position and distance rule for adequate operator safety is :
- A.
8 feet away from tubehead and at 90-135 degree angle to primary beam
- B.
6 feet away from tubehead and at 90-135 degree angle to primary beam
- C.
8 feet away from tubehead and at 90-150 degree angle to primary beam
- D.
6 feet away from tubehead and at 0-135 degree angle to primary beam
Correct Answer
B. 6 feet away from tubehead and at 90-135 degree angle to primary beam -
- 38.
The film characteristic that is " the amount of radiation required to produce a radiograph of standard density " is :
- A.
Film contrast
- B.
Film speed
- C.
Image resolution
- D.
Film emulsion
Correct Answer
B. Film speed -
- 39.
Long scale contrast mean :
- A.
High kilovoltage with low contrast
- B.
Low kilovoltage with low contrast
- C.
High kilovoltage with high contrast
- D.
Low kilovoltage with high contrast
Correct Answer
A. High kilovoltage with low contrast -
- 40.
The superconcentrated solution that is added to the processing solution to compensate for the effects of oxidation is termed the :
- A.
Emulsifier
- B.
Oxidizer
- C.
Hardener
- D.
Replenisher
- E.
Acidifier
Correct Answer
D. Replenisher -
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Mar 22, 2022Quiz Edited by
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Apr 01, 2016Quiz Created by
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