MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Prestressed Concrete Structures knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which beams are preferred mostly due to their higher flexural strength? |
| A. | Bonded beams |
| B. | Un bonded beams |
| C. | Exhaustive beams |
| D. | Extended beams |
| Answer» B. Un bonded beams | |
| 2. |
The development of crack widths is comparatively larger in ____________ |
| A. | Bonded beams |
| B. | Un bonded beams |
| C. | Localized beams |
| D. | Strengthened beams |
| Answer» B. Un bonded beams | |
| 3. |
The rate of increase of stress is larger in case of ____________ |
| A. | Bonded beams |
| B. | Un bonded beams |
| C. | Tensioned beams |
| D. | Anchorage beams |
| Answer» B. Un bonded beams | |
| 4. |
The stress in tendons of bonded beams is ____________ |
| A. | αe (My/I) |
| B. | αe (My/R) |
| C. | αe (My/L) |
| D. | αe (My/20) |
| Answer» B. αe (My/R) | |
| 5. |
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)? |
| A. | 0.005 |
| B. | 0.00525 |
| C. | 0.0024 |
| D. | 0.0045 |
| Answer» E. | |
| 6. |
The rate of increase in stress in the tendons of a prestress concrete member depends upon ____________ |
| A. | Bond and breakage |
| B. | Bond and surrounding concrete |
| C. | Bond and elasticity |
| D. | Bond and anchorage |
| Answer» C. Bond and elasticity | |
| 7. |
In the elastic range, any increase in prestressed member does not show any effect on ____________ |
| A. | Steel stress |
| B. | Compressive stress |
| C. | Bending stress |
| D. | Flexural stress |
| Answer» B. Compressive stress | |
| 8. |
The cross section of a prestressed concrete beam is 100mm wide and 300mm deep and the initial stress in tendons are located at a eccentricity of 50mm is 1000n/mm2, the sectional area is 100mm2. Find rotation due to prestress (hogging moment)? |
| A. | 0.00155 |
| B. | 0.00165 |
| C. | 0.00175 |
| D. | 0.00185 |
| Answer» E. | |
| 9. |
The rotation equation obtained by applying Mohr’s theorem considering a concrete beam of span l, force p, eccentricity e is? |
| A. | θp = PeL/2EI |
| B. | θp = PeL/4EI |
| C. | θp = PeL/16EI |
| D. | θp = PeL/20EI |
| Answer» B. θp = PeL/4EI | |
| 10. |
The prestressed member undergoes deformation due to the action of ______________ |
| A. | Prestressing force and flexural loads |
| B. | Prestressing force and combined loads |
| C. | Prestressing force and transverse loads |
| D. | Prestressing force and tangential loads |
| Answer» D. Prestressing force and tangential loads | |
| 11. |
THE_DEVELOPMENT_OF_CRACK_WIDTHS_IS_COMPARATIVELY_LARGER_IN:?$ |
| A. | Bonded beams |
| B. | Un bonded beams |
| C. | Localized beams |
| D. | Strengthened beams |
| Answer» B. Un bonded beams | |
| 12. |
Which_beams_are_preferred_mostly_due_to_their_higher_flexural_strength?$ |
| A. | Bonded beams |
| B. | Un bonded beams |
| C. | Exhaustive beams |
| D. | Extended beams |
| Answer» B. Un bonded beams | |
| 13. |
The rate of increase of stress is larger in case of? |
| A. | Bonded beams |
| B. | Un bonded beams |
| C. | Tensioned beams |
| D. | Anchorage beams |
| Answer» B. Un bonded beams | |
| 14. |
The stress in tendons of bonded beams is: |
| A. | α<sub>e</sub> (My/I) |
| B. | α<sub>e</sub> (My/R) |
| C. | α<sub>e</sub> (My/L) |
| D. | α<sub>e</sub> (My/20) |
| Answer» B. ‚âà√≠¬¨¬±<sub>e</sub> (My/R) | |
| 15. |
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)? |
| A. | 0.005 |
| B. | 0.00525 |
| C. | 0.0024 |
| D. | 0.0045 |
| Answer» E. | |
| 16. |
The rate of increase in stress in the tendons of a prestress concrete member depends upon: |
| A. | Bond and breakage |
| B. | Bond and surrounding concrete |
| C. | Bond and elasticity |
| D. | Bond and anchorage |
| Answer» C. Bond and elasticity | |
| 17. |
In the elastic range, any increase in prestressed member does not show any effect on: |
| A. | Steel stress |
| B. | Compressive stress |
| C. | Bending stress |
| D. | Flexural stress |
| Answer» B. Compressive stress | |
| 18. |
The cross section of a prestressed concrete beam is 100mm wide and 300mm deep and the initial stress in tendons are located at a eccentricity of 50mm is 1000n/mm2, the sectional area is 100mm2. Find rotation due to prestress (hogging moment)? |
| A. | 0.00155 |
| B. | 0.00165 |
| C. | 0.00175 |
| D. | 0.00185 |
| Answer» E. | |
| 19. |
The rotation equation obtained by applying Mohr’s theorem considering a concrete beam of span l, force p, eccentricity e is:$ |
| A. | θ<sub>p</sub> = PeL/2EI |
| B. | θ<sub>p</sub> = PeL/4EI |
| C. | θ<sub>p</sub> = PeL/16EI |
| D. | θ<sub>p</sub> = PeL/20EI |
| Answer» B. ‚âà√≠‚Äö√†√®<sub>p</sub> = PeL/4EI | |
| 20. |
The prestressed member undergoes deformation due to the action of: |
| A. | Prestressing force and flexural loads |
| B. | Prestressing force and combined loads |
| C. | Prestressing force and transverse loads |
| D. | Prestressing force and tangential loads |
| Answer» D. Prestressing force and tangential loads | |