MCQOPTIONS
Saved Bookmarks
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. |
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/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> | |
| 3. |
The value of 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 | |
| 4. |
The loss of stress due to friction is given as ____________ |
| A. | 1-( +Kx) |
| B. | 1-( +Kx) |
| C. | 1-( +Kx) |
| D. | 1-( +Kx) |
| Answer» B. 1-( +Kx) | |
| 5. |
The wobble effect is the result of ____________ |
| A. | Misalignment |
| B. | Extreme alignment |
| C. | Tensile alignment |
| D. | Anchorage alignment |
| Answer» B. Extreme alignment | |
| 6. |
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 | |
| 7. |
The loss of stress due to curvature effect depends upon ____________ |
| A. | Alignment |
| B. | Midpoint |
| C. | Centerline |
| D. | Exterior point |
| Answer» B. Midpoint | |
| 8. |
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 | |
| 9. |
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 | |