According to the concept of Limit State Design as per IS 456: 2000, the probability of failure of a structure is __________.

The composition of an air-entrained concrete is given below:

Water : 184 kg /m³

Ordinary Portland Cement(OPC) : 368 kg /m³

Sand : 606 kg /m³

Coarse aggregate : 1155 kg /m³

Assume the specific gravity of OPC, sand and coarse aggregate to be 3.14, 2.67 and 2.74, respectively. The air content is_________ liters/m³

Consider a reinforcing bar embedded in concrete. In a marine environment this bar undergoes uniform corrosion, which leads to deposition of corrosion products on its surface and an increase in apparent volume of the bar. This subjects the surrounding concrete to expansive pressure. As a result, corrosion cracks appear at surface of concrete. Which of the following statement is true?

Un-factored maximum bending moments at a section of a reinforced concrete beam resulting from a frame analysis are 50, 80, 120 and 180 kN-m under dead, live, wind and earthquake loads respectively. The design moment (kNm) as per IS: 456- 2000 for the limit state of collapse (flexure) is