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. |
The British code for structural concrete recommends design values of ultimate creep strain of pretensioning is ___________ |
| A. | 48 10<sup>-6</sup> |
| B. | 53 10<sup>-6</sup> |
| C. | 40 10<sup>-6</sup> |
| D. | 38 10<sup>-6</sup> |
| Answer» B. 53 10<sup>-6</sup> | |
| 2. |
A post tensioned concrete beam of rectangular section 200mm wide and 300mm deep is stressed by a parabolic cable with eccentricity 50mm at centre of span, area is 3 104mm2, initial stress is 1200n/mm2 Find the stress in concrete at the level of steel? |
| A. | 10n/mm<sup>2</sup> |
| B. | 15n/mm<sup>2</sup> |
| C. | 6n/mm<sup>2</sup> |
| D. | 8n/mm<sup>2</sup> |
| Answer» E. | |
| 3. |
A concrete beam of rectangular section 100mm wide, area is 3 104, initial stress is 1200n/mm2 of 7mm diameter located at an eccentricity 50mm. Estimate the loss of stress due to creep of concrete using the ultimate creep strain method? |
| A. | 88 |
| B. | 40 |
| C. | 50 |
| D. | 120 |
| Answer» B. 40 | |
| 4. |
The loss of stress in steel due to creep of concrete is ___________ |
| A. | cc fc Es |
| B. | c fc Ec |
| C. | c fe <sub>e</sub> |
| D. | cc fc |
| Answer» B. c fc Ec | |
| 5. |
The creep coefficient equation is given as ___________ |
| A. | Creep strain/elastic strain |
| B. | Creep stress/elastic stress |
| C. | Elastic strain/creep strain |
| D. | Elastic stress/creep stress |
| Answer» B. Creep stress/elastic stress | |
| 6. |
The creep coefficient is high for ___________ |
| A. | Pretensioned |
| B. | Post tensioned |
| C. | Chemical tensioned |
| D. | Electrical tensioned |
| Answer» B. Post tensioned | |
| 7. |
The creep coefficient varies from a minimum value of ___________ |
| A. | 2.0 |
| B. | 1.5 |
| C. | 2.5 |
| D. | 1.0 |
| Answer» C. 2.5 | |
| 8. |
The value of creep coefficient f depends upon ___________ |
| A. | Humidity |
| B. | Frost |
| C. | Uv rays |
| D. | Ice |
| Answer» B. Frost | |
| 9. |
The loss of stress due to creep of concrete can be estimated by ___________ |
| A. | Ultimate creep strain |
| B. | Ultimate load |
| C. | Ultimate creep stress |
| D. | Ultimate creep tension |
| Answer» B. Ultimate load | |