INTERVIEW QUESTIONS - [2] - RT

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INTERVIEW QUESTIONS

Radiography Testing

This series contains the common questions that are asked in interviews and exams related to Radiography Testing (RT).

1. What is the half-life of Iridium-192 Isotope?


Ans: 73.83 days.

2. What is meant by half value layer?


Ans: The thickness of a material at which the intensity of radiation becomes one half that of radiation falling at its surface is called half value layer.

3. What is the difference between primary and secondary radiation?


Ans: Radiation that is part of the original beam is called primary radiation. When this radiation hits the atoms of a material radiation is produced that is called secondary radiation or scattered radiation.

4. Iridium-192, natural or artificial isotope?


Ans: Artificial isotope.

5. What is the difference between atomic number and mass number?


Ans: Atomic number is the number of protons in an atom whereas mass number is number of protons and neutrons in an atom.


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