GATE Exam Questions

Q1: The group efficiency of a pile group

A will be always less than 100%.

B will be always greater than 100%.

C may be less than 100% or more than 100%.

D will be more than 100% for pile groups in cohensionless soils and less than 100% for those in cohesive soils.

ANS:D - will be more than 100% for pile groups in cohensionless soils and less than 100% for those in cohesive soils.

Cohensionless soil means no friction between soil particles so easy to driven then why efficiency less than 100%.



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