NUCLEAR GAUGE QUESTIONS AND
CORRECT ANSWERS
What is ALARA ✅✅CORRECT ANSW-The philosophy to achieve occupational and public doses that
are As Low As Reasonably Achievable. It minimizes exposure to radiation.
There are two types of radiation in the nuclear gauge. What are they and what do they do?
✅✅CORRECT ANSW-Cesium 137 - emits gamma ray photon radiation to determine density.
Americium 241 - (Combined non-radioactive Beryllium) Emits neutron radiation to determine
moisture content.
What are the two rods called in the gauge? ✅✅CORRECT ANSW-Source rods and long rods
The source rod is what comes out the bottom of the gauge that goes below the surface.
The long rod is what is on top of the gauge. It has the measurements and the trigger to push the
source rod below.
How many levels of shielding are in are from the source of the rod ✅✅CORRECT ANSW-Three
T/F There has never been a case where the metal encapsulation has failed or been penetrated.
✅✅CORRECT ANSW-True
RSO stands for ✅✅CORRECT ANSW-Radiation Safety Officer
What is a RSO's duties ✅✅CORRECT ANSW-To have security and control of radioactive materials.
Completeness and accuracy of all information by the regulatory agency.
Knowledge about contents, license and its conditions.
The need to commit adequate money and resources.
CORRECT ANSWERS
What is ALARA ✅✅CORRECT ANSW-The philosophy to achieve occupational and public doses that
are As Low As Reasonably Achievable. It minimizes exposure to radiation.
There are two types of radiation in the nuclear gauge. What are they and what do they do?
✅✅CORRECT ANSW-Cesium 137 - emits gamma ray photon radiation to determine density.
Americium 241 - (Combined non-radioactive Beryllium) Emits neutron radiation to determine
moisture content.
What are the two rods called in the gauge? ✅✅CORRECT ANSW-Source rods and long rods
The source rod is what comes out the bottom of the gauge that goes below the surface.
The long rod is what is on top of the gauge. It has the measurements and the trigger to push the
source rod below.
How many levels of shielding are in are from the source of the rod ✅✅CORRECT ANSW-Three
T/F There has never been a case where the metal encapsulation has failed or been penetrated.
✅✅CORRECT ANSW-True
RSO stands for ✅✅CORRECT ANSW-Radiation Safety Officer
What is a RSO's duties ✅✅CORRECT ANSW-To have security and control of radioactive materials.
Completeness and accuracy of all information by the regulatory agency.
Knowledge about contents, license and its conditions.
The need to commit adequate money and resources.
