Discussion
Statement I: Explosion relief panels prevent dust explosions.
Statement II: They release pressure in a controlled direction so the structure is not destroyed.
In the light of the above statements, choose the correct answer.
Answer: A
Correct answer: Statement I is incorrect but Statement II is correct
Statement I is incorrect. Relief panels do not prevent explosions at all - they take no part until an explosion has already begun.
Statement II is correct and states what they actually do: they fail at a low pressure and vent the explosion in a controlled direction, so the pressure inside never reaches the level that would destroy the structure. Prevention is a separate line of defence - dust extraction, housekeeping and the elimination of ignition sources - and the two are used together.
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