MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
In the working stress method, the modular ratio, m has a value of 280/(3 × permissible compressive stress). This expression for m |
| A. | partially takes into account the long-term effects such as creep |
| B. | fully takes into account the long-term effects such as creep |
| C. | does not take into account the long-term effects such as creep |
| D. | is the same as the modular ratio based on the value of the elastic modulus of the structural member |
| E. | takes into account the long-term effects such as creep |
| Answer» B. fully takes into account the long-term effects such as creep | |
| 2. |
A reinforced concrete circular section of 50,000 mm2 cross-sectional area carries 6 reinforcing bars whose total area is 500 mm2. If the concrete is not to be stressed more than 3.5 MPa and modular ratio for steel and concrete is 18, the safe load the column can carry will be nearly |
| A. | 225 kN |
| B. | 205 kN |
| C. | 180 kN |
| D. | 160 kN |
| Answer» C. 180 kN | |
| 3. |
In a reinforced concrete beam the stress in the concrete at the level of steel is measured as 6 N/mm2. The modular ratio between steel and concrete is 18. What is the stress in steel? |
| A. | 118 N/mm2 |
| B. | 108 N/mm2 |
| C. | 180 N/mm2 |
| D. | 60 N/mm2 |
| Answer» C. 180 N/mm2 | |
| 4. |
For high yield strength deformed bars of grade Fe500, the permissible stress in direct tension and flexure tension shall be _________ used in working stress method. |
| A. | 0.87 fy |
| B. | 0.67 fy |
| C. | 0.55 fy |
| D. | 0.48 fy |
| Answer» D. 0.48 fy | |
| 5. |
In a cantilever retaining wall, the main steel reinforcement is provided |
| A. | On the backfill side, in the vertical direction |
| B. | On both, inner and outer, faces |
| C. | In horizontal as well as in vertical directions. |
| D. | To counteract shear stresses |
| Answer» B. On both, inner and outer, faces | |
| 6. |
As per IS 456 : 2000, using working stress method, the modular ratio of M25 grade of concrete for permissible compressive strength due to bending in concrete σcbc = 8.5 MPa is: |
| A. | 15.63 |
| B. | 10.98 |
| C. | 12.04 |
| D. | 14.39 |
| Answer» C. 12.04 | |
| 7. |
If modular ratio is ‘m’ effective depth is D and stress ratio if ‘r’ \(\left( {r = \frac{{{\sigma _{st}}}}{{{\sigma _{cbc}}}}} \right)\) the depth of neutral axis of a balanced section is |
| A. | \(\left( {\frac{m}{{m - r}}} \right) \times D\) |
| B. | \(\left( {\frac{m}{{m + r}}} \right)D\) |
| C. | \(\left( {\frac{{m + r}}{m}} \right) \times D\) |
| D. | \(\frac{m}{r} \times D\) |
| Answer» C. \(\left( {\frac{{m + r}}{m}} \right) \times D\) | |