MCQOPTIONS
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MCQOPTIONS
This section includes 20 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 cylindrical concrete tank, 40m external diameter is to be prestressed circumferentially by means of a high strength steel wire (Es = 210kn/mm2) jacked at 4 points and 90 degrees apart. Find the expected extension at the jack? |
| A. | 150mm |
| B. | 130mm |
| C. | 144mm |
| D. | 133mm |
| Answer» D. 133mm | |
| 2. |
A concrete tank if has a minimum stress in wires 600n/mm2 immediately after tensioning and the coefficient of friction is 0.5. Calculate the maximum stress to be applied to the wires at the jack? |
| A. | 900n/mm2 |
| B. | 960n/mm2 |
| C. | 850n/mm2 |
| D. | 800n/mm2 |
| Answer» C. 850n/mm2 | |
| 3. |
A post tensioned concrete beam 200mm wide and 450mm deep, of span 10m, initial stress of 840n/mm2 is available in the un jacked end immediately after the anchoring. Find the angle between tangents to the cable at supports? |
| A. | 0.13 |
| B. | 0.12 |
| C. | 0.10 |
| D. | 0.23 |
| Answer» C. 0.10 | |
| 4. |
The value of ‘μ’ in loss of stress equation depends upon ____________ |
| A. | Type of curing |
| B. | Type of concrete |
| C. | Type of steel |
| D. | Type of aggregates |
| Answer» D. Type of aggregates | |
| 5. |
The loss of stress due to friction is given as ____________ |
| A. | 1-(μα+Kx) |
| B. | 1-(μα+Kx) |
| C. | 1-(μα+Kx) |
| D. | 1-(μα+Kx) |
| Answer» B. 1-(μα+Kx) | |
| 6. |
The wobble effect is the result of ____________ |
| A. | Misalignment |
| B. | Extreme alignment |
| C. | Tensile alignment |
| D. | Anchorage alignment |
| Answer» B. Extreme alignment | |
| 7. |
The wobble effect due to loss of stress is also known as ____________ |
| A. | Wave effect |
| B. | Ray effect |
| C. | Bubble effect |
| D. | Bulb effect |
| Answer» B. Ray effect | |
| 8. |
The loss of stress due to curvature effect depends upon ____________ |
| A. | Alignment |
| B. | Midpoint |
| C. | Centerline |
| D. | Exterior point |
| Answer» B. Midpoint | |
| 9. |
The total loss of prestress due to friction is of ____________ |
| A. | 4 types |
| B. | 2 types |
| C. | 8 types |
| D. | 3 types |
| Answer» C. 8 types | |
| 10. |
The loss of prestress due to friction generally occurs in case of ____________ |
| A. | Post tensioned members |
| B. | Pre tensioned members |
| C. | Chemical members |
| D. | Electrical members |
| Answer» B. Pre tensioned members | |
| 11. |
A_CONCRETE_TANK_IF_HAS_A_MINIMUM_STRESS_IN_WIRES_600N/MM2_IMMEDIATELY_AFTER_TENSIONING_AND_THE_COEFFICIENT_OF_FRICTION_IS_0.5._CALCULATE_THE_MAXIMUM_STRESS_TO_BE_APPLIED_TO_THE_WIRES_AT_THE_JACK??$ |
| A. | 900n/mm<sup>2</sup> |
| B. | 960n/mm<sup>2</sup> |
| C. | 850n/mm<sup>2</sup> |
| D. | 800n/mm<sup>2</sup> |
| Answer» C. 850n/mm<sup>2</sup> | |
| 12. |
A_cylindrical_concrete_tank,_40m_external_diameter_is_to_be_prestressed_circumferentially_by_means_of_a_high_strength_steel_wire_(Es_=_210kn/mm2)_jacked_at_4_points_and_90_degrees_apart._Find_the_expected_extension_at_the_jack?$ |
| A. | 150mm |
| B. | 130mm |
| C. | 144mm |
| D. | 133mm |
| Answer» D. 133mm | |
| 13. |
A post tensioned concrete beam 200mm wide and 450mm deep, of span 10m, initial stress of 840n/mm2 is available in the un jacked end immediately after the anchoring. Find the angle between tangents to the cable at supports? |
| A. | 0.13 |
| B. | 0.12 |
| C. | 0.10 |
| D. | 0.23 |
| Answer» C. 0.10 | |
| 14. |
The value of ‘μ’ in loss of stress equation depends upon:$ |
| A. | Type of curing |
| B. | Type of concrete |
| C. | Type of steel |
| D. | Type of aggregates |
| Answer» D. Type of aggregates | |
| 15. |
The loss of stress due to friction is given as: |
| A. | 1-(μα+Kx) |
| B. | 1-(μα+Kx) |
| C. | 1-(μα+Kx) |
| D. | 1-(μα+Kx) |
| Answer» B. 1-(‚âà√≠¬¨‚à´‚âà√≠¬¨¬±+Kx) | |
| 16. |
The wobble effect is the result of: |
| A. | Misalignment |
| B. | Extreme alignment |
| C. | Tensile alignment |
| D. | Anchorage alignment |
| Answer» B. Extreme alignment | |
| 17. |
The wobble effect due to loss of stress is also known as: |
| A. | Wave effect |
| B. | Ray effect |
| C. | Bubble effect |
| D. | Bulb effect |
| Answer» B. Ray effect | |
| 18. |
The loss of stress due to curvature effect depends upon: |
| A. | Alignment |
| B. | Midpoint |
| C. | Centerline |
| D. | Exterior point |
| Answer» B. Midpoint | |
| 19. |
The total loss of prestress due to friction is of: |
| A. | 4 types |
| B. | 2 types |
| C. | 8 types |
| D. | 3 types |
| Answer» C. 8 types | |
| 20. |
The loss of prestress due to friction generally occurs in case of: |
| A. | Post tensioned members |
| B. | Pre tensioned members |
| C. | Chemical members |
| D. | Electrical members |
| Answer» B. Pre tensioned members | |