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UPSC Civil Service Exam Questions

Q1:
Which of the following statements are true for the pile shown in the figure ?
1. Frictional resistance acts upwards through the length of the pile.
2. Negative skin friction acts over the length AB
3. Frictional resistance acts upwards over the length BC
4. There is point resistance at level C
Select the correct answer using the codes given below :

A 1, 3 and 4

B 2, 3 and 4

C 1 and 2

D 2 and 3

ANS:A - 1, 3 and 4

Shaded area shows soft soil and black area is stiff, negative skin friction acts only over the soft soil and frictional resistance acts over stiff clay.

Option 1 is incorrect because of the acting all over length according to question.

So the correct option is 2, 3, 4.



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