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Limited X-ray Machine Operator (LXMO) Core Module with Answers New Update
1. Which of the following statement are correct regarding the link
between radiation dose and genetic effects?
1. The link has been demonstrated in human studies.
2. The link has been demonstrated in animal studies.
3. Increased risk to humans cannot be predicted with respect to an
individual. - ANSWER- 2 and 3 only
2. Which of the following changes in kVp will result in the
greatest reduction of patient dose, when milliampere-seconds
(mAs) is adjusted to compensate for the change?
A. Decrease kVp by 30%
B. Decrease kVp by 15%
C. Increase kVp by 15%
D.Increase kVp by 30% - ANSWER- D. Increase kVp by
30%
3. Which of the following image receptor (IR) system speeds will
result in the lowest patient dose?
A. Slower-speed IR system
B. Faster-speed IR system
C. It does not matter; the IR system speed does not affect the
pt. dose. - ANSWER- B. Faster-speed IR system
4. What is the primary purpose of using gonad shields during
radiography?
A.Reduce the likelihood of genetic effects
B. Reduce the likelihood of somatic effects
C. Protect patient modesty
D. Demonstrate the location of the gonads in the image -
ANSWER- A. Reduce the likelihood of genetic effects
5. Which of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow - ANSWER- 2 and 3 only
6. When should gonad shielding be used?
A. For all patients
B. For all procedures
C. When the gonads are within 10 cm of the radiation field
D.When the gonads are within 5 cm of the radiation field -
ANSWER- D. When the gonads are within 5 cm of the
radiation field
7. The greatest cause of unnecessary radiation to patients that can
be controlled by the limited operator is:
A. Patient condition
B. Patient size
C. Repeat exposures
D. Equipment malfunction - ANSWER- C. Repeat exposures
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