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Assertion (A): A small scale model can flatter the stability of an armour layer.
Reason (R): Flow through the voids is relatively more viscous at reduced scale.

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

Answer: C

Both are true and the reason gives the distortion, and the effect works in the unsafe direction. Facility size is what ultimately limits how far the scale can be raised. Large facilities exist precisely to reduce this effect.

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