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. |
Which type of tensioning is generally uneconomical for vertical prestressing? |
| A. | Post tensioning |
| B. | Pre tensioning |
| C. | Chemical tension |
| D. | Thermal tension |
| Answer» B. Pre tensioning | |
| 2. |
A prestressed concrete beam of span 10m of rectangular section, 120mm wide & 300mm deep a curved cable having an eccentricity of 100mm at the centre of span. Find the slope of cable of support? |
| A. | 0.08 radians |
| B. | 0.01 radians |
| C. | 0.04 radians |
| D. | 0.12 radians |
| Answer» D. 0.12 radians | |
| 3. |
If the direct stresses are compressive, then the magnitude of principal stresses in prestressed concrete member gets __________ |
| A. | Increased |
| B. | Decreased |
| C. | Constant |
| D. | Zero |
| Answer» B. Decreased | |
| 4. |
The major principal stresses produced on diagonal plane is expressed as __________ |
| A. | fx + fy/2 |
| B. | fx + fy/2 – 1/2 ((fx – fy)2 + 4τ v2)1/2 |
| C. | fx + fy/2 + 1/2 ((fx – fy)2 + 4τ v2)1/2 |
| D. | fx – fy/2 |
| Answer» C. fx + fy/2 + 1/2 ((fx – fy)2 + 4τ v2)1/2 | |
| 5. |
In a prestressed concrete member, the shear stress is generally accompanied by __________ |
| A. | Zone stresses |
| B. | Anchorage stresses |
| C. | Direct stresses |
| D. | Bondage stresses |
| Answer» D. Bondage stresses | |
| 6. |
The effect of maximum shear stress (τ v) produces __________ |
| A. | Principal tensile stresses |
| B. | Principal compression stresses |
| C. | Principal strain stresses |
| D. | Principal span stresses |
| Answer» B. Principal compression stresses | |
| 7. |
The strength of concrete subjected to pure shear being nearly twice that in __________ |
| A. | Compression |
| B. | Tension |
| C. | Bond |
| D. | Anchorage |
| Answer» C. Bond | |
| 8. |
The shear stress is a function of __________ |
| A. | Shear force and Cross section |
| B. | Principle stresses and elevation |
| C. | Strain & Compatibility |
| D. | Axial prestress & tension |
| Answer» B. Principle stresses and elevation | |
| 9. |
A_PRESTRESSED_CONCRETE_BEAM_OF_SPAN_10M_OF_RECTANGULAR_SECTION,_120MM_WIDE_&_300MM_DEEP_A_CURVED_CABLE_HAVING_AN_ECCENTRICITY_OF_100MM_AT_THE_CENTRE_OF_SPAN._FIND_THE_SLOPE_OF_CABLE_OF_SUPPORT:?$ |
| A. | 0.08 radians |
| B. | 0.01 radians |
| C. | 0.04 radians |
| D. | 0.12 radians |
| Answer» D. 0.12 radians | |
| 10. |
Which_type_of_tensioning_is_generally_uneconomical_for_vertical_prestressing?$ |
| A. | Post tensioning |
| B. | Pre tensioning |
| C. | Chemical tension |
| D. | Thermal tension |
| Answer» B. Pre tensioning | |
| 11. |
A prestressed concrete beam span 10mm of rectangular section, 120mm wide & 300mm deep is axially prestressed on effective force of 180kn, uniformly distributed load of 5kn/m include the self weight of member. Find maximum shear stress at support? |
| A. | 20.5n/mm<sup>2</sup> |
| B. | 1.05n/mm<sup>2</sup> |
| C. | 15.08n/mm<sup>2</sup> |
| D. | 4.05n/mm<sup>2</sup> |
| Answer» C. 15.08n/mm<sup>2</sup> | |
| 12. |
How many ways are there for improving the shear resistance of structural concrete members by prestressing techniques? |
| A. | 4 |
| B. | 6 |
| C. | 3 |
| D. | 2 |
| Answer» D. 2 | |
| 13. |
If the direct stresses are compressive, then the magnitude of principal stresses in prestressed concrete member gets: |
| A. | Increased |
| B. | Decreased |
| C. | Constant |
| D. | Zero |
| Answer» B. Decreased | |
| 14. |
The major principal stresses produced on diagonal plane is expressed as: |
| A. | f<sub>x</sub> + f<sub>y</sub>/2 |
| B. | f<sub>x</sub> + f<sub>y</sub>/2 – 1/2 ((f<sub>x</sub> – f<sub>y</sub> )<sup>2</sup> +4τ <sub>v</sub><sup>2</sup> )<sup>1/2</sup> |
| C. | f<sub>x</sub> + f<sub>y</sub>/2 + 1/2 ((f<sub>x</sub> – f<sub>y</sub>)<sup>2</sup> +4τ <sub>v</sub><sup>2</sup> )<sup>1/2</sup> |
| D. | f<sub>x</sub> – f<sub>y</sub>/2 |
| Answer» C. f<sub>x</sub> + f<sub>y</sub>/2 + 1/2 ((f<sub>x</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® f<sub>y</sub>)<sup>2</sup> +4‚âà√¨‚àö√´ <sub>v</sub><sup>2</sup> )<sup>1/2</sup> | |
| 15. |
In a prestressed concrete member, the shear stress is generally accompanied by: |
| A. | Zone stresses |
| B. | Anchorage stresses |
| C. | Direct stresses |
| D. | Bondage stresses |
| Answer» D. Bondage stresses | |
| 16. |
The effect of maximum shear stress (τ v) produces:$ |
| A. | Principal tensile stresses |
| B. | Principal compression stresses |
| C. | Principal strain stresses |
| D. | Principal span stresses |
| Answer» B. Principal compression stresses | |
| 17. |
The strength of concrete subjected to pure shear being nearly twice that in: |
| A. | Compression |
| B. | Tension |
| C. | Bond |
| D. | Anchorage |
| Answer» C. Bond | |
| 18. |
The shear stress is a function of: |
| A. | Shear force and Cross section |
| B. | Principle stresses and elevation |
| C. | Strain & Compatibility |
| D. | Axial prestress & tension |
| Answer» B. Principle stresses and elevation | |