LRA 216 Final Exam Questions and
Answers6
Dose limits are based on a _____ dose-response relationship to radiation. - ANSWERS-linear,
nonthreshold
The NCRP publishes annual dose limits for____exposure - ANSWERS-All of the above
If a technologist is receiving 2 mGyt/hr standing 1 foot from the patient during fluoroscopy,
what is his rate of exposure when he steps back to a distance of 2 feet from the patient? -
ANSWERS-0.50 mGyt/hr
The first radiation health physicists worked with____ - ANSWERS-The atomic bomb
When using the inverse square law during fluoroscopy, the patient should be considered a(n)
_____ source of radiation. - ANSWERS-point
Exposure is measured by multiplying _____ by _____. - ANSWERS-exposure rate, exposure time
The dose limits for the general public is____the dose limits for occupational exposure -
ANSWERS-1/10
What is the best approach to occupational radiation exposure? - ANSWERS-follow the concept
of ALARA
The dose limits established by the NCRP are derived from - ANSWERS-BEIR and NSC reports
, The three cardinal principals of radiation protection involve____ - ANSWERS-Time
Distance
Shielding
The concept of effective dose accounts for the___ - ANSWERS-Different types of radiation and
RBE
Relative radiosensitivity of various tissues and organs
What is the NCRP - ANSWERS-National Council of Radiation Protection
Health physics is concerned with minimizing radiation dose to _____. - ANSWERS-Radiation
physicists
Radiation workers
The public
A tenth-value layer is equal to____half-vale layer - ANSWERS-3.3
If the HVL in a radiology department is 0.25 mm Pb, then how thick should a shield be to reduce
the technologists' exposure to one fourth the incident scatter? - ANSWERS-0.5 mm Pb
The NCRP makes___ regarding dose limits - ANSWERS-recommendations
The design of an uncontrolled area in radiology is based on the NCRP recommended limit
of___mSv/yr for the public - ANSWERS-1
What is the minimum requirement for filtration on x-ray equipment operating above 70 kVp -
ANSWERS-2.5 mm Al equivalent
Answers6
Dose limits are based on a _____ dose-response relationship to radiation. - ANSWERS-linear,
nonthreshold
The NCRP publishes annual dose limits for____exposure - ANSWERS-All of the above
If a technologist is receiving 2 mGyt/hr standing 1 foot from the patient during fluoroscopy,
what is his rate of exposure when he steps back to a distance of 2 feet from the patient? -
ANSWERS-0.50 mGyt/hr
The first radiation health physicists worked with____ - ANSWERS-The atomic bomb
When using the inverse square law during fluoroscopy, the patient should be considered a(n)
_____ source of radiation. - ANSWERS-point
Exposure is measured by multiplying _____ by _____. - ANSWERS-exposure rate, exposure time
The dose limits for the general public is____the dose limits for occupational exposure -
ANSWERS-1/10
What is the best approach to occupational radiation exposure? - ANSWERS-follow the concept
of ALARA
The dose limits established by the NCRP are derived from - ANSWERS-BEIR and NSC reports
, The three cardinal principals of radiation protection involve____ - ANSWERS-Time
Distance
Shielding
The concept of effective dose accounts for the___ - ANSWERS-Different types of radiation and
RBE
Relative radiosensitivity of various tissues and organs
What is the NCRP - ANSWERS-National Council of Radiation Protection
Health physics is concerned with minimizing radiation dose to _____. - ANSWERS-Radiation
physicists
Radiation workers
The public
A tenth-value layer is equal to____half-vale layer - ANSWERS-3.3
If the HVL in a radiology department is 0.25 mm Pb, then how thick should a shield be to reduce
the technologists' exposure to one fourth the incident scatter? - ANSWERS-0.5 mm Pb
The NCRP makes___ regarding dose limits - ANSWERS-recommendations
The design of an uncontrolled area in radiology is based on the NCRP recommended limit
of___mSv/yr for the public - ANSWERS-1
What is the minimum requirement for filtration on x-ray equipment operating above 70 kVp -
ANSWERS-2.5 mm Al equivalent
