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UPSC Civil Service Exam Questions - Engineering

Q1:

What is the value of flexural strength of M 25 concrete ?

A 4.0 MPa

B 3.5 MPa

C 3.0 MPa

D 1.75 MPa

ANS:B - 3.5 MPa

0.7sqrt(fck).
=0.7 * 5.
=3.5.