Rad Test B 2

26 Questions | By Yorel87 | Updated: Mar 20, 2022 | Attempts: 93

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1.

What happens to the radiographic image when a short (8in) PID is used?
- A.
  
  Magnification results
- B.
  
  Shorter exposure time
- C.
  
  Increased accuracy
2.

Which of the following are advantages of the bisecting technique?
- A.
  
  Increased accuracy
- B.
  
  Dimplicity of use
- C.
  
  Shorter exposure time
- D.
  
  A,b,c
- E.
  
  C only
- F.
  
  A only
3.

How much film should be between the occlusal surface of the teeth and the occlusal edge of the film on posterior radiographs?
- A.
  
  1/4 in =5mm
- B.
  
  3/8 in = 7.5mm
- C.
  
  1/16 in = 1.25mm
- D.
  
  1.2 in = 10mm
4.

How much area should be on a film beyond the apex of the tooth?
- A.
  
  3/8 in = 7.5mm
- B.
  
  1/2 in = 10mm
- C.
  
  3/4 in = 15mm
- D.
  
  1/4 in = 5mm
- E.
  
  1/8 in = 2.5mm
5.

What information is required to be recorded on the patients chart after dental x-ray exposure?
- A.
  
  Number of films
- B.
  
  Total kvp
- C.
  
  Total mA's
- D.
  
  Type of film
- E.
  
  Managing problems
- F.
  
  The position of the PID
- G.
  
  A,e,f
- H.
  
  A,b,c
- I.
  
  B,d,e
6.

What is the patient instructed to do during each exposure of the film?
- A.
  
  To close their eyes
- B.
  
  To hold their breath momentarily
- C.
  
  Do not move
- D.
  
  A and b
- E.
  
  A,b,c
7.

For maxillary radiographs, the patient's head is positioned so that the occlusal plane of the maxillary teeth is
- A.
  
  Parallel to the floor
- B.
  
  Parallel with the border of maxillary
- C.
  
  Parallel to the ala tragus line
8.

In what location whould the identification dot be correctly placed on film?
- A.
  
  Toward the occlusal or incisal
- B.
  
  Toward the distal
- C.
  
  Toward the medline
- D.
  
  Toward the plate or floor of the mouth
- E.
  
  None of the answers given
9.

What term describes the imaginary line between the long axis of the tooth and the film plane?
- A.
  
  Target
- B.
  
  Median
- C.
  
  Plain of the film
- D.
  
  Bisector
- E.
  
  None of the answers given
10.

What location along the ala tragus line is used as a point of entry for the canine exposure?
- A.
  
  Inner canthus of eye
- B.
  
  Synthesis of chin
- C.
  
  Outer canthus of eye
- D.
  
  Tip of nose
11.

What is the normal film requirement for the adult periapical survey when standard-sized film packets are used?
- A.
  
  18
- B.
  
  16
- C.
  
  14
- D.
  
  20
- E.
  
  12
12.

How many standard-size film are recommended to make the full bitewing survey of the posterior tooth?
- A.
  
  2
- B.
  
  4
- C.
  
  6
- D.
  
  8
13.

Which of these conditions could not be visible on a bitewing radiograph?
- A.
  
  Incipient caries
- B.
  
  Recurrent carries
- C.
  
  Apical abscess
- D.
  
  Aiveolar crest resorption
14.

Which of these factors is most likely to reduce the usefulness of a bitewing radiograph?
- A.
  
  Error in horizontal angulation
- B.
  
  Error in vertical angulation
- C.
  
  Vertical instead of horizontal film placement
- D.
  
  Horizontal instead of verticle film placement
15.

Which size film is used and how is it positioned in the anterior area of small narrow adult arch?
- A.
  
  Long-bitewing film placed vertically
- B.
  
  Narrow film placed horizontally
- C.
  
  Narrow film plaved vertically
- D.
  
  Standard film placed horizontally
16.

The interproximal exposure gives an excellent view of the height of the alveolar ridge.
- A.
  
  True
- B.
  
  False
17.

How many interproximal exposures are taken on an edentulous patient
- A.
  
  0
- B.
  
  2
- C.
  
  4
18.

What size film is used to include all the posterior teeth in one bitewing exposure?
- A.
  
  Size 0
- B.
  
  Size 2
- C.
  
  Size 3
- D.
  
  Size 4
19.

Which of the following is the correct vertical angulation used with the bitewing technique?
- A.
  
  -10 degrees
- B.
  
  -20 degrees
- C.
  
  +10 degrees
- D.
  
  +15 degrees
20.

What is the function of the lead foil in the x-ray packet?
- A.
  
  Moisture protection
- B.
  
  Protection against fluorescence
- C.
  
  Protection against backscatter
- D.
  
  Protection against central ray
- E.
  
  None of the answers
21.

The function of the gelatin in the dental film is to:
- A.
  
  Reduce the silver salts
- B.
  
  Give contrast to the film
- C.
  
  Keep silver compound suspended evenly on the film
- D.
  
  Provide a solid base for the dental x ray
- E.
  
  Speed processing
22.

The purpose of the small raised bump is:
- A.
  
  An identification dot
- B.
  
  Used to distinguish left and right
- C.
  
  Signigicant in film mounting
- D.
  
  All of the above
- E.
  
  None of the above.
23.

Radiographs must be protected:
- A.
  
  From heat
- B.
  
  From smudging
- C.
  
  From scratching
- D.
  
  All of the above
24.

Radiographs are valuable for:
- A.
  
  Current conditions for about 6 months
- B.
  
  Comparison with previous conditions
- C.
  
  Use in a court of law
- D.
  
  Cases of forensic identification
- E.
  
  All of the above
25.

If the films are mounted with the patient's left on the viewer's right, the identification dot will be:
- A.
  
  A bump (convex)
- B.
  
  A dimple (concave)
- C.
  
  Unimportant