Question

Assertion (A): Permanent lowering of GWT results in settlements.
Reason (R): Increase in effective stress results in settlement of soils.

Directions: The following items consists of two statements; one labelled as 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:

• 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 a correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Answer 1

The correct option is A both A and R are true and R is the correct explanation of A

(a)
Permanent lowering of Ground Water Table (GWT) reduces pore pressure and there by increases effective stress so settlement occurs.