Question

The minimum cube strength of concrete used for a prestressed member, is ________

(a) 50 kg/cm^2

(b) 150 kg/cm^2

(c) 350 kg/cm^2

(d) 100 kg/cm^2

The question was asked during a job interview.

My question comes from Estimation in R.C.C. Structures topic in division Different Type Roofs, R.C.C of Civil Engineering Drawing

Answer 1

The correct answer is (c) 350 kg/cm^2

The best explanation: M35 is minimum required concrete for prestressed concrete.

Here 35 is in N/mm^2. So convert it into kg/cm^2.

N/mm^2 = 10 kg/cm^2.

So 35 N/mm^2 = 350 Kg/cm^2.