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ROCK VALLEY COLLEGE DNT 1 16 CH 6 EXAM QUESTIONS AND
CORRECT ANSWERS!!
The portion of a dental image that appears dark or black is termed:
A. dense B. radiolucent C. radiopaque D. transparent - ANSWER B
The portion of a dental image that appears light or white is termed:
A. radiolucent B. radiopaque C. dense D. high density - ANSWER B
Which appears most radiolucent on a dental image?
A. bone B. enamel C. dentin D. air space - ANSWER D
Which appears most radiopaque on a dental image?
A. bone B. enamel C. dentin D. all of the above - ANSWER D
The overall blackness or darkness of a dental image is termed:
A. density B. contrast C. subject thickness D. diagnostic quality - ANSWER A
Increasing the milliamperage (mA) will cause:
A. an increase in density; the image appears darker B. an increase in density; the image appears lighter C. a decrease in density; the image appears darker D. a decrease in density; the image appears lighter - ANSWER A
Increasing the opening kilovoltage (kV) will cause:
A. an increase in density; the image appears darker B. an increase in density; the image appears lighter C. a decrease in density; the image appears darker D. a decrease in density; the image appears lighter - ANSWER A
Increasing the exposure time will cause:
D. low density - ANSWER B
A dental image that demonstrates very dark areas and very light areas is said to have:
A. high contrast B. low contrast C. high density D. low density - ANSWER A
The one exposure factor that has a direct influence on the contrast of a dental image is:
A. kilovoltage B. milliamperage C. exposure time D. subject thickness - ANSWER A
The type of contrast preferred in dental imaging is:
A. low contrast B. long-scale contrast only C. short-scale contrast only D. a compromise between short-scale contrast and long-scale contrast - ANSWER D
The stepwedge is used for all of the following except:
A. to demonstrate short-scale and long-scale contrast B. to monitor quality control of film processing
C. to increase the penetrating quality of the x-ray beams D. to demonstrate densities - ANSWER C
The capability of the receptor to reproduce distinct outlines of an object is termed:
A. sharpness B. magnification C. distortion D. diagnostic quality - ANSWER A
The unsharp or blurred edges seen on an image are termed:
A. distortion B. umbra C. penumbra D. contrast - ANSWER C
The geometric characteristic that refers to an image that appears larger than its actual size is termed:
A. distortion B detail C. definition D. magnification - ANSWER D
A variation in the true size and shape of the object being imaged is termed:
