QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS ) /ALREADY GRADED A+ | LATEST EXAM
Which body parts are especially sensitive to injury by
excessive exposure to x- or gamma rays? - ANSWER-Blood,
lens of the eye and internal organs
x- ray exposure may be due to: - ANSWER-The direct beam
from the x-ray tube target or scattered radiation arising from
objects in the direct beam
A general rule often employed for determining the Kilovoltage
to be used when x-raying a part is that: - ANSWER-the
Kilovoltage should be as low as other factors will permit
if a piece of lead 1/2" thick is placed in the path of a beam of
radiation emanating from Co- 60, it will reduce the dose rate at
a given location by: - ANSWER-One- half
excessive exposure of film to light prior to development of the
film will most likely result in: - ANSWER-a foggy film
,reticulation resulting in a puckered or net- like film surface is
probably caused by: - ANSWER-sudden extreme temperature
change while processing
frilling or loosening of the emulsion from the base of the film is
most likely caused by: - ANSWER-warm or exhausted fixer
solution
one of the general rules concerning the application of
geometric principles of shadow formation to radiography is: -
ANSWER-the distance between the anode and the material
examined should always be as great as possible
As a check on the adequacy of the radiographic technique, it is
customary to place a standard test piece on the source side of
the specimen. this standard test piece is called a: - ANSWER-
penetrameter
The duration of an exposure is usually controlled by: -
ANSWER-a timer
a penetrameter is used to indicate the: - ANSWER-quality of the
radiographic technique
, a fluorescent intensifying screen will: - ANSWER-transform x-
ray energy into visible or ultraviolet light
the three main steps in processing a radiograph are: -
ANSWER-developing, fixation, and washing
Kilovoltage, exposure time and source-to-film distance are
three of the most important x-ray exposure factors that can be
controlled. a fourth such exposure factor is: - ANSWER-
milliamperage
When the minute silver grains on which the x-ray film image is
formed group together in relatively large masses, they produce
a visual impression called: - ANSWER-graininess
Although there may be other reasons for using calcium
tungstate screens in industrial radiography, they are most
usually used to: - ANSWER-Decrease exposure time
In film radiography, pentrameters are usually placed: -
ANSWER-on the source side of the test object
The penetrating ability of an x-ray beam is governed by: -
ANSWER-Kilovoltage