Oral Radiology....1
.
- 1.
X rays produced mainly due to?
- A.
Bremsstrahlung radiation
- B.
Characteristic radiation
- C.
Both
- D.
None
Correct Answer
A. Bremsstrahlung radiation -
- 2.
Dental X rays beams are usually collimated to a circle of ?
- A.
1 inch
- B.
2.75 inches
- C.
4 inches
- D.
Any
Correct Answer
B. 2.75 inches -
- 3.
Target Anode is made up of?
- A.
Molybdenum
- B.
Copper
- C.
Tungston
- D.
None
Correct Answer
C. Tungston -
- 4.
Which scattering produces more film fog?
- A.
Thompson scattering
- B.
Photoelectric effect
- C.
Compton effect
- D.
Coherent scattering
Correct Answer
C. Compton effect -
- 5.
All or none effect is related to?
- A.
Chronic effect
- B.
Deterministic effect
- C.
Somatic effect
- D.
Stochastic effect
Correct Answer
D. Stochastic effect -
- 6.
Least sensitive to radiation?
- A.
Bone marrow
- B.
Endocrine glands
- C.
Nerve tissue
- D.
All
Correct Answer
C. Nerve tissue -
- 7.
Cells with least metabolic activity?
- A.
Most sensitive to radiation
- B.
Least sensitive to radiation
- C.
No sensitivity
- D.
None
Correct Answer
B. Least sensitive to radiation -
- 8.
Long cone open cylinder technique is used as adjunct parelleling technique to?
- A.
To prevent distortion of image
- B.
To prevent elongation of image
- C.
To prevent shortening of image
- D.
None
Correct Answer
A. To prevent distortion of image -
- 9.
Inherent character of X ray film are?
- A.
Defenition contrast and resolution
- B.
Defenition density resolution
- C.
Defenition,contrast density
- D.
All
Correct Answer
C. Defenition,contrast density -
- 10.
Which of the fillowing increases radiation exposure?
- A.
High KVP
- B.
Low KVP
- C.
High speed film
- D.
All
Correct Answer
B. Low KVP -
- 11.
Which one is more ionizing?
- A.
X ray
- B.
Beta ray
- C.
Alpha ray
- D.
Gamma ray
Correct Answer
C. Alpha ray -
- 12.
Increased Kvp leads to?
- A.
Increased contrast
- B.
Decreased contrast
- C.
No effect on contrast
- D.
None
Correct Answer
B. Decreased contrast -
- 13.
Which leads to reduced patient exposure?
- A.
Increased mA
- B.
Increased Kvp
- C.
Use of grids
- D.
All
Correct Answer
B. Increased Kvp -
- 14.
Tungston target is embedded in ?
- A.
Molybdenum
- B.
Copper
- C.
Chromium
- D.
Any
Correct Answer
B. Copper -
- 15.
In characteristic radiation ?
- A.
Atom is unionized
- B.
Atom is ionized
- C.
No effect
- D.
None
Correct Answer
B. Atom is ionized -
- 16.
Radiation dose if 7-15 GY cause?
- A.
Prodrimal symptoms
- B.
Mild hematopoietic systems
- C.
Gastrointestinal symptoms
- D.
All
Correct Answer
C. Gastrointestinal symptoms -
- 17.
Compared to round collimator rectangular collimator reduces exposure?
- A.
15%
- B.
30%
- C.
60%
- D.
45%
Correct Answer
C. 60% -
- 18.
Mean exposure of radiation from OPG ?
- A.
80mR
- B.
90mR
- C.
100mR
- D.
300 mR
Correct Answer
B. 90mR -
- 19.
Total filtration for 70Kvp is? ?
- A.
2.5 mm
- B.
1.5 mm
- C.
1mm
- D.
2 mm
Correct Answer
B. 1.5 mm -
- 20.
Father of radiology?
- A.
Carlson
- B.
Roentgen
- C.
Smith
- D.
Nuggler
Correct Answer
B. Roentgen -
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Jul 25, 2018Quiz Edited by
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Jul 25, 2018Quiz Created by
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