Radiology Best Answer
- 1.The penetrating power of xrays depend on
- A.
Kvp
- B.
Ma
- C.
Film speed
- D.
Focal film distance
- 2.The size of the collimated beam for intraoral radiology measured at the patient skin is
- A.
1.5 to 1.75 inches
- B.
2.0 to 2.25 inches
- C.
2.75 to 3.00 inches
- D.
3.25 to 3.50 inches
- 3.Filtration of the xray beam protects the patient by
- A.
Eliminating all radiation from the xray head
- B.
Eliminating weak wavelength xrays from the x ray beam
- C.
Eliminating short wavelength x rays from the xray beam
- D.
Decreasing exposure time
- 4.The most penetrating xrays have
- A.
Low frequencies
- B.
Soft rays
- C.
Long wavelengths
- D.
Long wavelengths
- E.
Short wavelengths
- 5.The x ray which is at the center of the primary beam is called the
- A.
Cathode ray
- B.
Secondary ray
- C.
Restricted beam
- D.
Central ray
- 6.The housing of the xray tube is
- A.
Copper
- B.
Plastic
- C.
Tungsten
- D.
Glass
- 7.As the target film distance is increased there is
- A.
More chance of elongation
- B.
More chance of overlapping
- C.
More chance of foreshortening
- D.
Less distortion
- 8.Overlapping is a result of
- A.
Incorrect vertical angulation
- B.
Incorrect horizontal angulation
- C.
Excessive bending of the film
- D.
All of the above
- 9.After a film is exposed, the target film distance is doubled. the exposure time necessary to obtain a second film of equal density to the first film is
- A.
The same as the first film
- B.
Twofold
- C.
Threefold
- D.
Fourfold
- 10.Wich cells are the most sensitive to xrays?
- A.
Muscle
- B.
Nerve
- C.
Sperm
- D.
Epithelial
- 11.Which cells are the least sensitive to x rays?
- A.
Ova
- B.
Blood
- C.
Sperm
- D.
Nerve
- 12.The first sign of x ray dermatitis is
- A.
Loss of hair
- B.
Purulent exudate
- C.
Erythema
- D.
Pain
- 13.Scatter radiation is a type of
- A.
Secondary radiation
- B.
Primary radiation
- C.
Stray radiation
- D.
None of the above
- 14.The lead foil in the xray film packet is used to
- A.
Stop unused radiation
- B.
Tell the front of the film from the back
- C.
Prevent film fogging
- D.
Decrease operator's radiation exposure
- 15.The quality or penetrating power of secondary radiation is
- A.
More than that of primary radiation
- B.
Less than that of primary radiation
- C.
The same as that of primary radiation
- D.
Unrelated to that of primary radiation
- 16.If a radiograph remains in the developing solution too long the film will be
- A.
Lighter
- B.
Darker
- C.
Lighter only if the temperature is increased
- D.
Unaffected because time is not a factor
- 17.Film fog may occur if there is
- A.
A light leak in the darkroom
- B.
Bending of the film
- C.
Reversal of the film
- D.
Extremely thick bone
- 18.Films not fixed for a long enough period of time will appear
- A.
To have black lines running through them
- B.
To be brittle
- C.
To have a brown tint
- D.
White
- 19.Film is washed after removing it from the developing solution to
- A.
Remove any debris on the film
- B.
Speed up the developing process
- C.
Stop the developing process
- D.
Remove the precipitated silver salts
- 20.In order for the developing chemicals to work, the solution must be
- A.
Acidic
- B.
Neutral
- C.
Basic
- 21.Fixing the film
- A.
Removes the unaffected silver salts
- B.
Removes the affected silver salts
- C.
Softens the film
- D.
Peels the emulsion from the film base
- 22.The fixing solution is
- A.
Acidic
- B.
Neutral
- C.
Basic
- D.
First basic then neutral after dilution
- 23.Reticulation is
- A.
Cracking of the film emulsion
- B.
An electric charge in the developing solution
- C.
A latent image
- D.
Due to excess radiation
- 24.The optimum time temperature relationship for processing dental radiographs is
- A.
74 f for 4 1/2 minutes
- B.
68 F for 6 minutes
- C.
50 F for 5 minutes
- D.
Varied according to manufactures specification
- 25.The panoramic radiograph is not diagnostic for
- A.
Caries detection
- B.
General survey
- C.
Confirmation of mandibular fractures
- D.
Detection of impacted wisdom teeth
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