1=Derivation of D²/162. 2=nominal mix 3=design mix 4=per tonne binding wire 5=water cement ratio 6=recent experience or responsibility.

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The interview questions cover topics such as derivation, mix, binding wire, water cement ratio, and recent experience.

D²/162 is derived from the formula for calculating the weight of a steel bar
Nominal mix refers to the mix of cement, sand, and aggregate in a fixed ratio
Design mix is a mix of cement, sand, and aggregate that is designed to meet specific requirements
The cost per tonne of binding wire varies depending on the quality and supplier
Water cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix
Recent experience or responsibility refers to the candidate's most recent work experience and job responsibilities

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