Radiobiology and Protection MRO 7
Exam Questions and Answers10
What are primary protective barriers?
Those in areas occupied by imaging personnel
Those in the waiting room
Those at which the primary beam is directed
Those bordering other occupied space - ANSWERS-Those at which the primary beam is directed
What is the best location for the control panel exposure switch?
On a very long cord outside the room where the radiographic equipment is located
On a short cord directly outside the door to the room where the radiographic equipment is
located
Either stationary on the control panel or on a short cord so that it can be used only from within
the control booth
On the wall next to the door inside the room where the radiographic equipment is located -
ANSWERS-Either stationary on the control panel or on a short cord so that it can be used only
from within the control booth
What is the most common protective barrier material used in primary barriers?
Lead glass
Multiple layers of gypsum board
Wood
, Lead sheets bonded to wood or sheet rock - ANSWERS-Lead sheets bonded to wood or sheet
rock
What are U.S. government standards for dose limits based on?
National Council on Radiation Protection and Measurement (NCRP)
recommendations
Nuclear regulatory commission recommendations
Individual state recommendations
American Hospital Association recommendations - ANSWERS-National Council on Radiation
Protection and Measurement (NCRP)
recommendations
Why are secondary barriers always given a use factor of 1?
They are constructed of less-protective material than are primary barriers
Scatter radiation and leakage radiation are always present when the tube is energized
The primary beam is not directed at them
It is impossible to accurately calculate use, so 1 is used as a safety factor - ANSWERS-Scatter
radiation and leakage radiation are always present when the tube is energized
What is the effective dose equivalent for occupants of controlled areas?
Less than 1000 microsieverts (100 mR)/week
1 mSv (0.1 mR)/week
10 mSv (1 mR)/month
1000 Sv (100 R)/month - ANSWERS-Less than 1000 microsieverts (100 mR)/week
Exam Questions and Answers10
What are primary protective barriers?
Those in areas occupied by imaging personnel
Those in the waiting room
Those at which the primary beam is directed
Those bordering other occupied space - ANSWERS-Those at which the primary beam is directed
What is the best location for the control panel exposure switch?
On a very long cord outside the room where the radiographic equipment is located
On a short cord directly outside the door to the room where the radiographic equipment is
located
Either stationary on the control panel or on a short cord so that it can be used only from within
the control booth
On the wall next to the door inside the room where the radiographic equipment is located -
ANSWERS-Either stationary on the control panel or on a short cord so that it can be used only
from within the control booth
What is the most common protective barrier material used in primary barriers?
Lead glass
Multiple layers of gypsum board
Wood
, Lead sheets bonded to wood or sheet rock - ANSWERS-Lead sheets bonded to wood or sheet
rock
What are U.S. government standards for dose limits based on?
National Council on Radiation Protection and Measurement (NCRP)
recommendations
Nuclear regulatory commission recommendations
Individual state recommendations
American Hospital Association recommendations - ANSWERS-National Council on Radiation
Protection and Measurement (NCRP)
recommendations
Why are secondary barriers always given a use factor of 1?
They are constructed of less-protective material than are primary barriers
Scatter radiation and leakage radiation are always present when the tube is energized
The primary beam is not directed at them
It is impossible to accurately calculate use, so 1 is used as a safety factor - ANSWERS-Scatter
radiation and leakage radiation are always present when the tube is energized
What is the effective dose equivalent for occupants of controlled areas?
Less than 1000 microsieverts (100 mR)/week
1 mSv (0.1 mR)/week
10 mSv (1 mR)/month
1000 Sv (100 R)/month - ANSWERS-Less than 1000 microsieverts (100 mR)/week
