Rad Test B 2
- 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
Questions: 210 | Attempts: 10848 | Last updated: Oct 13, 2020
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