Answer the Following Questions of Reinforced Concrete using the...

Answer the Following Questions of Reinforced Concrete using the National Structural Code of the Philippines.

Some are True or false,

1. In pre-stressed beams with 28th day compressive strength 40 MPa, the allowable concrete compressive stress at mid-span section immediately after load transfer is calculated as ________. The concrete reached 80% of its strength at the time of load transfer.  answer in 2 decimal places.
2. The modulus of rupture of a normal weight concrete with ultimate compressive strength f'c = 28 MPa is __________ MPa as per NSCP 2015.
3. Grade of steel represents the ________________.
4. What is the minimum concrete cover in mm for cast and permanently exposed to earth?
5. The constant β₁ for f'_c = 30 MPa is ______. (Answer in 3 decimal places).
6. In flexure design, transition failure is when the steel tensile strain compatible with concrete strain of 0.003 is less than the tensile yield strain and greater than 0.002.
7. The steel  tensile strain limit for a tension controlled failure is ___________.
8. Concrete compressive strain is expected to be at ___________ when the concrete is on the verge of crushing as per NSCP.