SSC JE Civil Engineering 2018 Set 5 Solved Paper

Question : 108 of 200

Marks: +1, -0

Which of the following shows the CORRECT expression for target mean strength (f

_\cm

) of concrete, if the characteristic strength and standard deviation is given by f

_\ok

and

σ

respectively?

Solution:

Target mean strength =

\f_\m

Characteristic strength = f

_\ck

Standard deviation = σ

[\f_m= \f_\ck +1.65 σ]

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