Discussion
Assertion (A): A pressed compact can be denser at its top face than at its base.
Reason (R): Friction at the die wall means the applied pressure is not transmitted uniformly through the depth.
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 mechanism. In single-action pressing the punch enters from one side and friction against the die wall absorbs part of the load, so the pressure reaching the far end is lower and that end is less dense. Double-action pressing, or a floating die, presses from both sides and halves the gradient.
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