Prestressed Concrete Structures Practice Test 2

1. The compressive and tensile stresses developed in cracking moments are due to ____________

2. A beam of symmetrical I-section spanning 8m has a flange width of 250mm and flange thickness of 80mm, overall depth is 450mm, eccentricity of 150mm, g = 1.57kn/m, q = 2.50kn/m. Determine effective force?

3. The rotation equation obtained by applying Mohr’s theorem considering a concrete beam of span l, force p, eccentricity e is?

4. The diagram indicating the bending stress of the cross section the beam is?

5. The micro cracks develop as soon as the tensile strain in concrete exceeds about ____________

6. Which conditions are negligible at the stage of visible cracking on concrete?

7. The period of cooling in thermo electric pre stressing is observed as ___________

8. The basic chemical substance used for pre stressing forces in concrete member is ___________

9. The cracks appear when the tensile stresses at the soffit are equal to ____________

10. The moment profile for given loading is?