Prestressed Concrete Structures Mock Test 2

1. The tensile stresses developed in steel by the expansion of concrete are about ___________

2. If the beam supports uniformly distributed load the tendon follows.

3. The resultant stresses in concrete at any section are obtained by the effect of ___________

4. How many types of losses in prestress are observed in pretensioned member?

5. The location of the pressure line depends upon ___________

6. A pre tensioned concrete beam 100mm wide and 300mm deep, initial force of 150kn at an eccentricity of 50mm, moment of inertia is 225×10⁶mm⁴, initial stress in steel is 400n/mm², modular ratio is 8. Estimate the percentage loss?

7. When the loads in a concrete member are further increased than permitted, the crack widths are of an order of limit?

8. A prestressed concrete beam used over a span of 6m is 100mm wide and 300mm deep, live load of 4kn/m, density of concrete is 24kn/m³, modulus of elasticity of concrete is 36 and steel is 210kn/mm². Find rotation due to loads(sagging moment)?

9. The rate of increase of stress is larger in case of ____________

10. How many types of splicing arrangement are widely used in post tensioning systems?