LLRT Practice Exam - Core Module
The link has been demonstrated in animal studies. Increase risk to humans cannot be predicted with
respect to an individual. correct answersWhich of the following statements are correct regarding the link
between radiation dose and genetic effects?
Increase kVp by 30% correct answersWhich of the following changes in kilovoltage (kVp) will result in the
greatest reductions of patient dose, when milliampere-seconds (mAs) is adjusted to compensate for the
change?
Faster-speed IR system correct answersWhich of the following image receptor (IR) system speeds will
result in the lowest patient dose?
Contact and shadow correct answersWhich of the following are types of gonad shields?
When the gonads are within 5cm of the radiation field correct answersWhen should gonad shielding be
used?
Repeat exposures correct answersThe greatest cause of unnecessary radiation to patients that can be
controlled by the limited operator is:
Clearly instructing patients correct answersThe limited operator can reduce repeat exposures by:
It limits the radiation field to the area of interest correct answersHow does x-ray beam restriction
minimize patient exposure?
Collimator correct answersWhat is the device that allows the limited operator to vary the size of the
radiation field?
Reduce the likelihood of genetic effects correct answersWhat is the primary purpose of using gonad
shields during radiography?
, Removes longer-wavelength photons correct answersHow does filtration reduce patient exposure?
2.5 mm Al equiv correct answersWhat is the National Council on Radiation Protection and
Measurements (NCRP) recommendation for the amount of total filtration?
Time,distance, and shielding correct answersWhat are the three principal methods used to protect
limited operators from unnecessary radiation exposure?
Shadow correct answersWhich of the following is not a type of personnel radiation shielding?
Scattered radiation from the patient correct answersPersonnel shielding must be worn on the rare
occasion during which the limited operator may need to remain in the radiographic room during an
exposure to assist the patient in maintaining the proper position. What is the source of the greatest
radiation hazard under this circumstance?
Leakage radiation correct answersWhat is the term for radiation that escapes from the x-ray tube
housing?
They are considered occupationally exposed individuals correct answersWhy are limited operators
prohibited from activities that result in direct exposure to the primary x-beam?
The operator should maximize the distance from the source during an exposure. correct
answersDistance, as a method used to limit operator exposure, means that:
Scatter radiation correct answersShielding worn for personnel protection is designed to attenuate what
source of exposure?
TLD (Thermoluminescent dosimeters) correct answersWhich of the following is an acronym for a
common type of personnel dosimeter?
The link has been demonstrated in animal studies. Increase risk to humans cannot be predicted with
respect to an individual. correct answersWhich of the following statements are correct regarding the link
between radiation dose and genetic effects?
Increase kVp by 30% correct answersWhich of the following changes in kilovoltage (kVp) will result in the
greatest reductions of patient dose, when milliampere-seconds (mAs) is adjusted to compensate for the
change?
Faster-speed IR system correct answersWhich of the following image receptor (IR) system speeds will
result in the lowest patient dose?
Contact and shadow correct answersWhich of the following are types of gonad shields?
When the gonads are within 5cm of the radiation field correct answersWhen should gonad shielding be
used?
Repeat exposures correct answersThe greatest cause of unnecessary radiation to patients that can be
controlled by the limited operator is:
Clearly instructing patients correct answersThe limited operator can reduce repeat exposures by:
It limits the radiation field to the area of interest correct answersHow does x-ray beam restriction
minimize patient exposure?
Collimator correct answersWhat is the device that allows the limited operator to vary the size of the
radiation field?
Reduce the likelihood of genetic effects correct answersWhat is the primary purpose of using gonad
shields during radiography?
, Removes longer-wavelength photons correct answersHow does filtration reduce patient exposure?
2.5 mm Al equiv correct answersWhat is the National Council on Radiation Protection and
Measurements (NCRP) recommendation for the amount of total filtration?
Time,distance, and shielding correct answersWhat are the three principal methods used to protect
limited operators from unnecessary radiation exposure?
Shadow correct answersWhich of the following is not a type of personnel radiation shielding?
Scattered radiation from the patient correct answersPersonnel shielding must be worn on the rare
occasion during which the limited operator may need to remain in the radiographic room during an
exposure to assist the patient in maintaining the proper position. What is the source of the greatest
radiation hazard under this circumstance?
Leakage radiation correct answersWhat is the term for radiation that escapes from the x-ray tube
housing?
They are considered occupationally exposed individuals correct answersWhy are limited operators
prohibited from activities that result in direct exposure to the primary x-beam?
The operator should maximize the distance from the source during an exposure. correct
answersDistance, as a method used to limit operator exposure, means that:
Scatter radiation correct answersShielding worn for personnel protection is designed to attenuate what
source of exposure?
TLD (Thermoluminescent dosimeters) correct answersWhich of the following is an acronym for a
common type of personnel dosimeter?
