The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is…
A. carbon – 14
B. Phosphorus – 32
C. Cobalt- 60
D. Iodine – 131
Radioisotopes are often employed in industrial radiography to conduct checks for underground pipeline leakages and faulty cracks in castings.
The actual rays used to conduct this radiography is either x-rays from artificial x-ray guns, or gamma rays from natural radioactive elements like cobalt-60 or iridium-192.
Now for the right answer to the above question:
- Option A is incorrect. carbon-14 decay gives a beta particle and not x-ray nor gamma ray which are the radiations necessary for a successful radiography.
- Option B is also incorrect. phosphorus-32 also emits beta particles and not gamma rays.
- C is correct. Cobalt-60 emits gamma rays which is very useful in industrial radiography.
- D is not the correct answer. Iodine-131 also decays to emit beta particles and not gamma rays.
You may please note these/this:
- Non-particulate radiations like gamma and x-rays are ideal for use in industrial radiography.
- Beta particles, not currently used to detect underground cracks.
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/ culled from 2018 JAMB-UTME Chemistry question 21 /
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