MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
Calculate the stress of pretensioned beams assuming as propped during the casting of the slab if Zt is 225 10, Zb is 128x104mm3 and moment due to self weight is 1200nmm? |
| A. | 12.3 and 4.5 |
| B. | 0.53 and 0.94 |
| C. | 0.23 and 0.45 |
| D. | 1.23 and 0.67 |
| Answer» C. 0.23 and 0.45 | |
| 2. |
Calculate stresses due to slab weight in precast sections given moment due to slab weight is 1200nm of section modulus 667 103? |
| A. | 1.8n/mm<sup>2</sup> |
| B. | 1.5n/mm<sup>2</sup> |
| C. | 2.5n/mm<sup>2</sup> |
| D. | 2.3n/mm<sup>2</sup> |
| Answer» B. 1.5n/mm<sup>2</sup> | |
| 3. |
The modular ratio of precast prestressed unit is ___________ |
| A. | 2.0 to 1.6 |
| B. | 1.1 to 1.5 |
| C. | 2.4 to 1.4 |
| D. | 2.2 to 1.7 |
| Answer» C. 2.4 to 1.4 | |
| 4. |
In modulus of elasticity of insitu concrete of grade M20 will be about ___________ |
| A. | 25kn/mm<sup>2</sup> |
| B. | 30kn/mm<sup>2</sup> |
| C. | 35kn/mm<sup>2</sup> |
| D. | 40kn/mm<sup>2</sup> |
| Answer» B. 30kn/mm<sup>2</sup> | |
| 5. |
For computing the live load stresses, the effect of different moduli between the cast in situ and precast unit is considerable by ___________ |
| A. | Eccentricity |
| B. | Modular ratio |
| C. | Tensile stresses |
| D. | Deflections |
| Answer» C. Tensile stresses | |
| 6. |
In most composite constructions which involve prestressed units and insitu cast concrete the latter is of ___________ |
| A. | High strength concrete |
| B. | Medium strength concrete |
| C. | Colored concrete |
| D. | Reinforced concrete |
| Answer» C. Colored concrete | |
| 7. |
If the precast unit is propped during the placing of insitu concrete, the stresses due to self weight are computed using ___________ |
| A. | Section modulus |
| B. | Eccentricity |
| C. | Tension |
| D. | Principle stress |
| Answer» B. Eccentricity | |
| 8. |
Once the insitu concrete hardens, we assume the section to be ___________ |
| A. | Dilithic |
| B. | Monolithic |
| C. | Transverse |
| D. | Longitudinal |
| Answer» C. Transverse | |
| 9. |
The stresses developed in the prestressed structures are computed using __________ |
| A. | Simple bending equations |
| B. | Stress strain theory |
| C. | Strain analysis |
| D. | Stress curves |
| Answer» B. Stress strain theory | |