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Assertion (A): A geotextile is sometimes used beneath a rubble mound.
Reason (R): It prevents the fine sea bed material from migrating up into the structure.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both are true and the reason gives the function, and it replaces one or more granular filter layers. Its durability under wave attack and construction traffic must be considered. Damage during placement is the usual failure mode.

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