Discussion
Assertion (A): Dust extraction at transfer points is the first line of defence against explosions.
Reason (R): Removing any one element of the explosion pentagon prevents the event.
Select the correct answer from the options below.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the principle. An explosion needs fuel, oxygen, an ignition source, dispersion and confinement all at once, so removing any one prevents it. Dust extraction attacks the fuel directly, at the transfer points where dust is generated, which is why it comes first; relief panels are what remain if that defence fails.
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