MCQOPTIONS
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MCQOPTIONS
This section includes 18 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. | 48×10-6 |
| B. | 53×10-6 |
| C. | 40×10-6 |
| D. | 38×10-6 |
| Answer» B. 53×10-6 | |
| 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/mm2 |
| B. | 15n/mm2 |
| C. | 6n/mm2 |
| D. | 8n/mm2 |
| 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. | ℇcc fc Es |
| B. | ℇc fc Ec |
| C. | ℇc fe αe |
| D. | ℇcc fc ϕ |
| Answer» B. ℇc 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 |
| 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 | |
| 10. |
The_British_code_for_structural_concrete_recommends_design_values_of_ultimate_creep_strain_of_pretensioning_is:$ |
| A. | 48√ó10<sup>-6</sup> |
| B. | 53√ó10<sup>-6</sup> |
| C. | 40√ó10<sup>-6</sup> |
| D. | 38√ó10<sup>-6</sup> |
| Answer» B. 53‚Äö√†√∂‚àö‚â•10<sup>-6</sup> | |
| 11. |
A concrete beam of rectangular section 100mm wide, area is 3√ó104, 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 | |
| 12. |
The loss of stress in steel due to creep of concrete is: |
| A. | ‚Ñácc fc Es |
| B. | ‚Ñác fc Ec |
| C. | ℇc fe α<sub>e</sub> |
| D. | ℇcc fc ϕ |
| Answer» B. ‚Äö√Ñ√∂‚àö√´‚àö¬∞c fc Ec | |
| 13. |
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 | |
| 14. |
The creep coefficient is high for: |
| A. | Pretensioned |
| B. | Post tensioned |
| C. | Chemical tensioned |
| D. | Electrical tensioned |
| Answer» B. Post tensioned | |
| 15. |
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 | |
| 16. |
The value of creep coefficient ‘f’ depends upon:$ |
| A. | Humidity |
| B. | Frost |
| C. | Uv rays |
| D. | Ice |
| Answer» B. Frost | |
| 17. |
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 | |
| 18. |
Which of the following results in the reduction of stress in steel used for prestress? |
| A. | Shrinkage |
| B. | Friction |
| C. | Creep |
| D. | Anchorage slip |
| Answer» D. Anchorage slip | |