Question

The individual variation between test strength of concrete cube sample should not be more than

• A. $\pm 5$ % of average
• B. $\pm 10$ % of average
• C. $\pm 15$ % of average
• D. $\pm 20$ % of average

Answer 1

The correct option is C $\pm 15$ % of average

The individual variation between test strength of concrete cube samples should not be more than $\pm 15$ % of average.