RADIATION SAFETY FINAL EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
12.5 mrem - Answer-A person is standing in an area where they are exposed to 25
mrem during a 40 second shot with a tube setting of 10mA. If the milliamperage were
changed to 5mA with the same exposure time, what would the person's new exposure
be?
you must survey the tube assembly 360 degrees - Answer-At the completion of an X-ray
exposure and turning the system to stand by:
0.5 mR\HR - Answer-An X-ray cabinet must comply with unrestricted area
requirements. The maximum amount of radiation emitted from the cabinet at 1.97
inches shall not exceed:
amperage rheostat - Answer-The output equivalent to curies with an X-ray tube is
controlled by the:
4,5, & 10 - Answer-The parts of the Louisiana Administrative Code that pertain directly
to radiographic are chapters:
2mR/hr - Answer-The storage vault cannot have more than what reading at any external
surface?
50 mrem - Answer-A radiographer was exposed to a dose of 100 mR/hr for 30 minutes.
What was the dose?
Primary Radiation - Answer-Radiation arising directly from the target of an X-ray tube or
an accelerator, or from a radioactive source, is usually referred to as:
Normal and Special form - Answer-In accordance with DOT regulation, radioactive
materials are classified into which two categories?
200 mR/hr - Answer-The maximum radiation intensity level at the surface of a package
with a Radioactive Yelow III shipping lable is:
Electrostatic principle - Answer-Van De Graff generators obtain their electrons through:
Tungsten - Answer-In most cases, the standard anode material is:
All of them:
1. Prevent oxidation of components within the tube
, 2. Reduce the problems of electrons colliding with, and being absorbed by molecules or
air
3. Act as an electrical insulator between the cathode and anode - Answer-The high-
vacuum envelope is used to:
High-speed electrons are introduced from the cathode and strike the anode within a
vacuum-sealed envelope - Answer-X-radiation is produced when a supply of:
Milliamperes - Answer-Increasing ____________________ across the filament expends
more free electrons, thereby increasing the numbers of free electrons able to cross and
strike the anode target creating more X-radiation
Electron - Answer-The structure known as the cathode serves as the _______________
source.
Heat - Answer-Most of the energy used in producing X-ray converts to:
Beryllium - Answer-In most tubes _________________ is used as an exit port for the x-
radiation enery
Penetrating capabilities of the X-ray produced - Answer-Raising the kilovolts on the
control panel affects the:
Special Form - Answer-Sources which have been double encapsulated to prevent the
release of radioactive material are called ______________.
1 meter - Answer-The reading for the Transport Index of a shipping container should be
taken how far from the surface?
Reportable Quality - Answer-The RQ label placed on a transport package indentifies
radioactive material package as:
Yelow II - Answer-A radiographic exposure device that has a radiation level of 35 mR/hr
at the surface and less than 1 mR/hr at one meter should be labeled as:
Yellow III - Answer-Upon receiving a 100 curie IR-192 source, you note that the reading
at the surface of the exposure device is 65 mR/hr and the Transport Index is 1. What
label would you need to affix to the exposure device?
116 mR/hr - Answer-What is the radiation intensity at 15' from a 30 curie Co-60 source
while using a 4HVL collimator? (Emissivity for Co-60 is 14R/hr/ @ 1')
2.3 curies - Answer-If the intensity 20 feet from Iridium 192 souce is 30 mR/hr, what is
the activity of the source? (Emissivity for IR-192 is 5.2R/h/c@1')
QUESTIONS WITH COMPLETE
SOLUTIONS
12.5 mrem - Answer-A person is standing in an area where they are exposed to 25
mrem during a 40 second shot with a tube setting of 10mA. If the milliamperage were
changed to 5mA with the same exposure time, what would the person's new exposure
be?
you must survey the tube assembly 360 degrees - Answer-At the completion of an X-ray
exposure and turning the system to stand by:
0.5 mR\HR - Answer-An X-ray cabinet must comply with unrestricted area
requirements. The maximum amount of radiation emitted from the cabinet at 1.97
inches shall not exceed:
amperage rheostat - Answer-The output equivalent to curies with an X-ray tube is
controlled by the:
4,5, & 10 - Answer-The parts of the Louisiana Administrative Code that pertain directly
to radiographic are chapters:
2mR/hr - Answer-The storage vault cannot have more than what reading at any external
surface?
50 mrem - Answer-A radiographer was exposed to a dose of 100 mR/hr for 30 minutes.
What was the dose?
Primary Radiation - Answer-Radiation arising directly from the target of an X-ray tube or
an accelerator, or from a radioactive source, is usually referred to as:
Normal and Special form - Answer-In accordance with DOT regulation, radioactive
materials are classified into which two categories?
200 mR/hr - Answer-The maximum radiation intensity level at the surface of a package
with a Radioactive Yelow III shipping lable is:
Electrostatic principle - Answer-Van De Graff generators obtain their electrons through:
Tungsten - Answer-In most cases, the standard anode material is:
All of them:
1. Prevent oxidation of components within the tube
, 2. Reduce the problems of electrons colliding with, and being absorbed by molecules or
air
3. Act as an electrical insulator between the cathode and anode - Answer-The high-
vacuum envelope is used to:
High-speed electrons are introduced from the cathode and strike the anode within a
vacuum-sealed envelope - Answer-X-radiation is produced when a supply of:
Milliamperes - Answer-Increasing ____________________ across the filament expends
more free electrons, thereby increasing the numbers of free electrons able to cross and
strike the anode target creating more X-radiation
Electron - Answer-The structure known as the cathode serves as the _______________
source.
Heat - Answer-Most of the energy used in producing X-ray converts to:
Beryllium - Answer-In most tubes _________________ is used as an exit port for the x-
radiation enery
Penetrating capabilities of the X-ray produced - Answer-Raising the kilovolts on the
control panel affects the:
Special Form - Answer-Sources which have been double encapsulated to prevent the
release of radioactive material are called ______________.
1 meter - Answer-The reading for the Transport Index of a shipping container should be
taken how far from the surface?
Reportable Quality - Answer-The RQ label placed on a transport package indentifies
radioactive material package as:
Yelow II - Answer-A radiographic exposure device that has a radiation level of 35 mR/hr
at the surface and less than 1 mR/hr at one meter should be labeled as:
Yellow III - Answer-Upon receiving a 100 curie IR-192 source, you note that the reading
at the surface of the exposure device is 65 mR/hr and the Transport Index is 1. What
label would you need to affix to the exposure device?
116 mR/hr - Answer-What is the radiation intensity at 15' from a 30 curie Co-60 source
while using a 4HVL collimator? (Emissivity for Co-60 is 14R/hr/ @ 1')
2.3 curies - Answer-If the intensity 20 feet from Iridium 192 souce is 30 mR/hr, what is
the activity of the source? (Emissivity for IR-192 is 5.2R/h/c@1')
