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UPSC Civil Service Exam Questions - Engineering

Q1:

The approximate ratio of strength of 15 cm x 30 cm concrete cylinder to that of 15 cm cube of the same concrete is

A 1.25

B 1.00

C 0.85

D 0.50

ANS:C - 0.85

Ratio of cylinder strength to cube strength varies from 0.77 -0.96. Thus 0.85 can be taken as approximation ratio.