MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
A concrete beam is prestressed by a cable carrying an initial prestressing force of 300kn, area is 300mm2. Calculate the percentage of loss of stress due to shrinkage in pretensioned members? |
| A. | 6.3% |
| B. | 5.3% |
| C. | 4% |
| D. | 2.3% |
| Answer» B. 5.3% | |
| 2. |
The post tensioned members in dry atmospheric conditions, the shrinkage may be increased by ___________ |
| A. | 50% |
| B. | 70% |
| C. | 30% |
| D. | 100% |
| Answer» B. 70% | |
| 3. |
The loss of prestress due to shrinkage is obtained by multiplying ___________ |
| A. | Shrinkage strain and modulus of elasticity |
| B. | Principal stress and durability of concrete |
| C. | Curing and grade of concrete |
| D. | Compression and tension |
| Answer» B. Principal stress and durability of concrete | |
| 4. |
After the transfer of prestress, the total residual shrinkage will be larger in case of ___________ |
| A. | Pretensioned members |
| B. | Post tensioned members |
| C. | Chemical tensioned members |
| D. | Biological tensioned members |
| Answer» B. Post tensioned members | |
| 5. |
The differential shrinkage between the interior and surface of large members result in ___________ |
| A. | Surface gradient |
| B. | Strain gradient |
| C. | Compatibility gradient |
| D. | Stress gradient |
| Answer» C. Compatibility gradient | |
| 6. |
The rate of shrinkage is higher at ___________ |
| A. | End |
| B. | Surface |
| C. | Middle |
| D. | Edges |
| Answer» C. Middle | |
| 7. |
The shrinkage of concrete is influenced by ___________ |
| A. | Type of cement |
| B. | Type of chemical |
| C. | Type of admixtures |
| D. | Type of retarders |
| Answer» B. Type of chemical | |
| 8. |
The shrinkage of concrete in prestressed members results in ___________ |
| A. | Shortening |
| B. | Elongation |
| C. | Bulking |
| D. | Stressing |
| Answer» B. Elongation | |