Oral Radiology....1

20 Questions | By Ismayilpkn4 | Last updated: Jul 25, 2018 | Total Attempts: 147

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1.

X rays produced mainly due to?
- A.
  
  Bremsstrahlung radiation
- B.
  
  Characteristic radiation
- C.
  
  Both
- D.
  
  None
2.

Dental X rays beams are usually collimated to a circle of ?
- A.
  
  1 inch
- B.
  
  2.75 inches
- C.
  
  4 inches
- D.
  
  Any
3.

Target Anode is made up of?
- A.
  
  Molybdenum
- B.
  
  Copper
- C.
  
  Tungston
- D.
  
  None
4.

Which scattering produces more film fog?
- A.
  
  Thompson scattering
- B.
  
  Photoelectric effect
- C.
  
  Compton effect
- D.
  
  Coherent scattering
5.

All or none effect is related to?
- A.
  
  Chronic effect
- B.
  
  Deterministic effect
- C.
  
  Somatic effect
- D.
  
  Stochastic effect
6.

Least sensitive to radiation?
- A.
  
  Bone marrow
- B.
  
  Endocrine glands
- C.
  
  Nerve tissue
- D.
  
  All
7.

Cells with least metabolic activity?
- A.
  
  Most sensitive to radiation
- B.
  
  Least sensitive to radiation
- C.
  
  No sensitivity
- D.
  
  None
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
9.

Inherent character of X ray film are?
- A.
  
  Defenition contrast and resolution
- B.
  
  Defenition density resolution
- C.
  
  Defenition,contrast density
- D.
  
  All
10.

Which of the fillowing increases radiation exposure?
- A.
  
  High KVP
- B.
  
  Low KVP
- C.
  
  High speed film
- D.
  
  All
11.

Which one is more ionizing?
- A.
  
  X ray
- B.
  
  Beta ray
- C.
  
  Alpha ray
- D.
  
  Gamma ray
12.

Increased Kvp leads to?
- A.
  
  Increased contrast
- B.
  
  Decreased contrast
- C.
  
  No effect on contrast
- D.
  
  None
13.

Which leads to reduced patient exposure?
- A.
  
  Increased mA
- B.
  
  Increased Kvp
- C.
  
  Use of grids
- D.
  
  All
14.

Tungston target is embedded in ?
- A.
  
  Molybdenum
- B.
  
  Copper
- C.
  
  Chromium
- D.
  
  Any
15.

In characteristic radiation ?
- A.
  
  Atom is unionized
- B.
  
  Atom is ionized
- C.
  
  No effect
- D.
  
  None
16.

Radiation dose if 7-15 GY cause?
- A.
  
  Prodrimal symptoms
- B.
  
  Mild hematopoietic systems
- C.
  
  Gastrointestinal symptoms
- D.
  
  All
17.

Compared to round collimator rectangular collimator reduces exposure?
- A.
  
  15%
- B.
  
  30%
- C.
  
  60%
- D.
  
  45%
18.

Mean exposure of radiation from OPG ?
- A.
  
  80mR
- B.
  
  90mR
- C.
  
  100mR
- D.
  
  300 mR
19.

Total filtration for 70Kvp is? ?
- A.
  
  2.5 mm
- B.
  
  1.5 mm
- C.
  
  1mm
- D.
  
  2 mm
20.

Father of radiology?
- A.
  
  Carlson
- B.
  
  Roentgen
- C.
  
  Smith
- D.
  
  Nuggler