Limited Scope of Radiography Practice
Exam ACTUAL QUESTIONS AND
CORRECT ANSWERS
what statements are correct regarding the link between radiation and genetic effects -
CORRECT ANSWER The link has been demonstrated in animal studies. Increased risk
to humans cannot be predicted with respect to an individual.
The changes in kilovoltage (kVp) will result in the greatest reduction of patient dose, when
milliampere-seconds (mAs) is adjusted to compensate for the change - CORRECT
ANSWER Increase kVp by 30%
______ _____ IR System speeds will result in the lowest patient dose - CORRECT
ANSWER Faster speed IR system
Infection control guidelines require:
a. hand washing after contact w each patient
b. destroying all contaminated linen
c. sterilizing cassettes prior to use
d. wearing gloves for all patient contact - CORRECT ANSWER a. hand washing after
contact w each patient
Which of the following sets of technical factors will produce the radiograph with the
GREATEST DENSITY?
a. 100 mA, 500 msec, 48" SID, 80 kVp
b. 200 mA, 250 msec, 36" SID, 76 kVp
c. 400 mA, 125 msec, 40" SID, 76 kVp
d. 500 mA, 100 msec, 40" SID, 76 kVp - CORRECT ANSWER b. 200 mA, 250 msec,
36" SID, 76 kVp
Grid cut-off on a radiograph may be caused by all of the following EXCEPT:
, a. a tube that is off-center
b. a tube that is angled perpendicular to the lead strips
c. grid motion being started before the exposure is made
d. improper distance being used with a focused grid - CORRECT ANSWER c. grid
motion being started before the exposure is made
The purpose of the x-ray tube housing is to:
1. provide adequate filtration
2. provide electrical shielding
3. control leakage radiation - CORRECT ANSWER 2 & 3 only
The primary purpose of using gonad shields is to: - CORRECT ANSWER reduce the
likelihood of genetic effects
There are two types of gonad shielding: - CORRECT ANSWER Contact and shadow
Gonad shielding should be used when the gonads are within ____ cm of the _________
______. - CORRECT ANSWER when the gonads are within 5 cm of the radiation field
the greatest cause of unnecessary radiation to patients that can be controlled by the limited
operator is _____ ________ - CORRECT ANSWER repeat exposures
The limited operator can reduce repeat exposure by: - CORRECT ANSWER clearly
instructing patients
The x-ray beam restriction minimizes patient exposure because it _____ the radiation to the
___ __ ______. - CORRECT ANSWER it limits the radiation field to the area of
interest
What is the device that allows the limited operator to vary the size of the radiation field? -
CORRECT ANSWER collimator
Exam ACTUAL QUESTIONS AND
CORRECT ANSWERS
what statements are correct regarding the link between radiation and genetic effects -
CORRECT ANSWER The link has been demonstrated in animal studies. Increased risk
to humans cannot be predicted with respect to an individual.
The changes in kilovoltage (kVp) will result in the greatest reduction of patient dose, when
milliampere-seconds (mAs) is adjusted to compensate for the change - CORRECT
ANSWER Increase kVp by 30%
______ _____ IR System speeds will result in the lowest patient dose - CORRECT
ANSWER Faster speed IR system
Infection control guidelines require:
a. hand washing after contact w each patient
b. destroying all contaminated linen
c. sterilizing cassettes prior to use
d. wearing gloves for all patient contact - CORRECT ANSWER a. hand washing after
contact w each patient
Which of the following sets of technical factors will produce the radiograph with the
GREATEST DENSITY?
a. 100 mA, 500 msec, 48" SID, 80 kVp
b. 200 mA, 250 msec, 36" SID, 76 kVp
c. 400 mA, 125 msec, 40" SID, 76 kVp
d. 500 mA, 100 msec, 40" SID, 76 kVp - CORRECT ANSWER b. 200 mA, 250 msec,
36" SID, 76 kVp
Grid cut-off on a radiograph may be caused by all of the following EXCEPT:
, a. a tube that is off-center
b. a tube that is angled perpendicular to the lead strips
c. grid motion being started before the exposure is made
d. improper distance being used with a focused grid - CORRECT ANSWER c. grid
motion being started before the exposure is made
The purpose of the x-ray tube housing is to:
1. provide adequate filtration
2. provide electrical shielding
3. control leakage radiation - CORRECT ANSWER 2 & 3 only
The primary purpose of using gonad shields is to: - CORRECT ANSWER reduce the
likelihood of genetic effects
There are two types of gonad shielding: - CORRECT ANSWER Contact and shadow
Gonad shielding should be used when the gonads are within ____ cm of the _________
______. - CORRECT ANSWER when the gonads are within 5 cm of the radiation field
the greatest cause of unnecessary radiation to patients that can be controlled by the limited
operator is _____ ________ - CORRECT ANSWER repeat exposures
The limited operator can reduce repeat exposure by: - CORRECT ANSWER clearly
instructing patients
The x-ray beam restriction minimizes patient exposure because it _____ the radiation to the
___ __ ______. - CORRECT ANSWER it limits the radiation field to the area of
interest
What is the device that allows the limited operator to vary the size of the radiation field? -
CORRECT ANSWER collimator
