LMRT STATE EXAM ACTUAL EXAM 200 QUESTIONS
AND CORRECT DETAILED ANSWERS|AGRADE (NEWEST
VERSION)
Which of the following statements 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
Which of the following changes in kilovoltage (KVP) will result in the greatest
reduction of patient dose, when milliamperage-seconds (mAs) is adjusted to
compensate for the dosage?
A.) Decrease kVp by 30%
B.) Decrease kVp by 15%
C.) Increase kVp by 15%
D.) Increase kVp by 30% - ANSWER: Increase kVp by 30%
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 patient dose. -
ANSWER: Faster speed IR system
What is the primary purpose of using gonad shields during radiography?
A.) Reduce the likelihood of genetic changes
B.) Reduce likelihood of somatic effects
C.) Protect patient modesty
D.) Demonstrate the location of the gonads in the image - ANSWER: Reduce the
likelihood of genetic changes
Which one of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow
A.) 1 and 2 only
B.) 1 and 3 only
C.) 2 and 3 only
D.) 1, 2, and 3 - ANSWER: 2 and 3 only
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: 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:
A.) Patient condition
B.) Patient size
C.) Repeat exposure
D.) equipment malfunction - ANSWER: Repeat exposure
The limited operator can reduce repeat exposures by:
A.) Accepting marginal images
B.) Clearly instructing patients
C.) increasing the source-image receptor distance (SID)
D.) optimizing the kVp - ANSWER: Clearly instructing patients
How does x-ray beam restriction minimize patient exposure?
A.) it limits radiation fog
B.) It limits the radiation field to the area of interest
C.) It limits the effect of patient motion
D.) It limits repeat exposure - 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?
A.) Collimator
B.) Detent
C.) Filter
D.) Sheild - ANSWER: Collimator
How does filtration reduce patient exposure?
A.) Removes the shorter-wavelength photons
B.) Removes longer wavelength photons
C.) Reduces the size of the radiation field
D.) Reduces the time of exposure - ANSWER: Removes longer wavelength photons
What is the National Council on Radiation Protection and Measurements (NCRP)
recommendation for the amount of total filtration?
A.) 0.5mm aluminum equivalent ( AL Equiv)
B.) 1.5mm AL Equiv
C.) 2.5mm Al Equiv
D.) 3.5mm Al Equiv - ANSWER: 2.5mm Al Equiv
What are the three principal methods used to protect limited operators from
unnecessary radiation exposure?
A. Time, Distance, and Shielding
B.) Time, Distance, and Collimation
, C.) Distance, Collimation, and Shielding
D.) Time, Collimation, and Filtration - ANSWER: Time, Distance, and Shielding
Which of the following is not a type of personnel radiation shielding?
A.) Apron
B.) Glove
C.) Thyroid Shield
D.) Shadow - ANSWER: Shadow
Personnel shielding must be worn on the rare occasion during which the limited
operator may need to remain in the radiographic room during the exposure to assist
the patient in maintaining the proper position . What is the source of the greatest
radiation hazard under this circumstance?
A.) Off-focus radiation
B.) Leakage Radiation
C.) Scattered Radiation from the patient
D.) Back scatter radiation from the IR - ANSWER: Scattered Radiation from the
patient
What is the term for radiation that escapes from the x-ray tube housing?
A.) Scatter radiation
B.) Off-focus radiation
C.) Primary Radiation
D.) Leakage Radiation - ANSWER: Leakage Radiation
Why are limited operators prohibited from activities that results in direct exposure
to the primary x-ray beam?
A.) They are considered occupationally exposed individuals
B.) These activities carry immediate health risk
C.) Their interaction with the beam will affect patient dose
D.) Their presence near the patient increases liability - ANSWER: They are considered
occupationally exposed individuals
Distance, as a method used to limit operator exposure, means that:
A.) The operator should maximize the distance from the source during an exposure.
B.) The operator should minimize the distance from the source during an exposure
C.) The operator should maximize the distance from the patient during an exposure
D.) The operator should minimize the distance from the patient during an exposure -
ANSWER: The operator should maximize the distance from the source during an
exposure.
Shielding worn for personnel protection is designed to attenuate what source of
exposure?
A.) Primary radiation
B.) Off-focus radiation
C.) Leakage Radiation
D.) Scatter radiation - ANSWER: Scatter Radiation
AND CORRECT DETAILED ANSWERS|AGRADE (NEWEST
VERSION)
Which of the following statements 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
Which of the following changes in kilovoltage (KVP) will result in the greatest
reduction of patient dose, when milliamperage-seconds (mAs) is adjusted to
compensate for the dosage?
A.) Decrease kVp by 30%
B.) Decrease kVp by 15%
C.) Increase kVp by 15%
D.) Increase kVp by 30% - ANSWER: Increase kVp by 30%
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 patient dose. -
ANSWER: Faster speed IR system
What is the primary purpose of using gonad shields during radiography?
A.) Reduce the likelihood of genetic changes
B.) Reduce likelihood of somatic effects
C.) Protect patient modesty
D.) Demonstrate the location of the gonads in the image - ANSWER: Reduce the
likelihood of genetic changes
Which one of the following are types of gonad shields?
1. Aperture
2. Contact
3. Shadow
A.) 1 and 2 only
B.) 1 and 3 only
C.) 2 and 3 only
D.) 1, 2, and 3 - ANSWER: 2 and 3 only
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: 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:
A.) Patient condition
B.) Patient size
C.) Repeat exposure
D.) equipment malfunction - ANSWER: Repeat exposure
The limited operator can reduce repeat exposures by:
A.) Accepting marginal images
B.) Clearly instructing patients
C.) increasing the source-image receptor distance (SID)
D.) optimizing the kVp - ANSWER: Clearly instructing patients
How does x-ray beam restriction minimize patient exposure?
A.) it limits radiation fog
B.) It limits the radiation field to the area of interest
C.) It limits the effect of patient motion
D.) It limits repeat exposure - 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?
A.) Collimator
B.) Detent
C.) Filter
D.) Sheild - ANSWER: Collimator
How does filtration reduce patient exposure?
A.) Removes the shorter-wavelength photons
B.) Removes longer wavelength photons
C.) Reduces the size of the radiation field
D.) Reduces the time of exposure - ANSWER: Removes longer wavelength photons
What is the National Council on Radiation Protection and Measurements (NCRP)
recommendation for the amount of total filtration?
A.) 0.5mm aluminum equivalent ( AL Equiv)
B.) 1.5mm AL Equiv
C.) 2.5mm Al Equiv
D.) 3.5mm Al Equiv - ANSWER: 2.5mm Al Equiv
What are the three principal methods used to protect limited operators from
unnecessary radiation exposure?
A. Time, Distance, and Shielding
B.) Time, Distance, and Collimation
, C.) Distance, Collimation, and Shielding
D.) Time, Collimation, and Filtration - ANSWER: Time, Distance, and Shielding
Which of the following is not a type of personnel radiation shielding?
A.) Apron
B.) Glove
C.) Thyroid Shield
D.) Shadow - ANSWER: Shadow
Personnel shielding must be worn on the rare occasion during which the limited
operator may need to remain in the radiographic room during the exposure to assist
the patient in maintaining the proper position . What is the source of the greatest
radiation hazard under this circumstance?
A.) Off-focus radiation
B.) Leakage Radiation
C.) Scattered Radiation from the patient
D.) Back scatter radiation from the IR - ANSWER: Scattered Radiation from the
patient
What is the term for radiation that escapes from the x-ray tube housing?
A.) Scatter radiation
B.) Off-focus radiation
C.) Primary Radiation
D.) Leakage Radiation - ANSWER: Leakage Radiation
Why are limited operators prohibited from activities that results in direct exposure
to the primary x-ray beam?
A.) They are considered occupationally exposed individuals
B.) These activities carry immediate health risk
C.) Their interaction with the beam will affect patient dose
D.) Their presence near the patient increases liability - ANSWER: They are considered
occupationally exposed individuals
Distance, as a method used to limit operator exposure, means that:
A.) The operator should maximize the distance from the source during an exposure.
B.) The operator should minimize the distance from the source during an exposure
C.) The operator should maximize the distance from the patient during an exposure
D.) The operator should minimize the distance from the patient during an exposure -
ANSWER: The operator should maximize the distance from the source during an
exposure.
Shielding worn for personnel protection is designed to attenuate what source of
exposure?
A.) Primary radiation
B.) Off-focus radiation
C.) Leakage Radiation
D.) Scatter radiation - ANSWER: Scatter Radiation
