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Statement I: The distance to the maximum ground level concentration is independent of stack height.

Statement II: A plume released higher must grow further before it reaches the ground.

In the light of the above statements, choose the correct answer.

  • A.Statement I is correct but Statement II is incorrect
  • B.Statement I is incorrect but Statement II is correct
  • C.Both Statement I and Statement II are correct
  • D.Both Statement I and Statement II are incorrect

Answer: B

Correct answer: Statement I is incorrect but Statement II is correct

Statement II contradicts statement I and is the correct one. Because a plume released higher must grow further vertically before touching the ground, the distance to the maximum ground-level concentration increases with effective stack height - it is anything but independent of it.

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