MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Geotechnical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When the surcharge angle reduces to zero, the coefficient of active earth pressure is given by |
| A. | K<sub>a</sub>=1 |
| B. | (K_a= frac{1-sin }{1+sin } ) |
| C. | (K_a= frac{1+sin }{1-sin } ) |
| D. | K<sub>a</sub>=0 |
| Answer» C. (K_a= frac{1+sin }{1-sin } ) | |
| 2. |
For backfill with sloping surface, the coefficient of active earth pressure is given by ______ |
| A. | (K_a= frac{ sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) |
| B. | (K_a= frac{cos + sqrt{cos^2 -cos^2 }}{cos - sqrt{cos^2 -cos^2 }} ) |
| C. | (K_a= frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) |
| D. | (K_a=cos frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) |
| Answer» E. | |
| 3. |
The Rankine s lateral pressure ratio is given by ________ |
| A. | (K= frac{ sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) |
| B. | (K= frac{cos + sqrt{cos^2 -cos^2 }}{cos - sqrt{cos^2 -cos^2 }} ) |
| C. | (K= frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) |
| D. | (K=cos frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) |
| Answer» D. (K=cos frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} ) | |
| 4. |
The vertical and the lateral pressures have the same angle of obliquity . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
For finding out the active earth pressure for a backfill with sloping surface, the Rankine s theory makes as additional assumption of ________ |
| A. | vertical and lateral stresses are normal to surcharge |
| B. | vertical and lateral stresses are tangential to surcharge |
| C. | vertical and lateral stresses are conjugate |
| D. | vertical and lateral stresses are negligible |
| Answer» D. vertical and lateral stresses are negligible | |
| 6. |
The height of fill Ze, equivalent to uniform surcharge intensity is __________ |
| A. | q/ |
| B. | q- |
| C. | q+ |
| D. | q* |
| Answer» B. q- | |
| 7. |
If the backfill carries a uniform surcharge q, then the lateral pressure at the depth of wall H is ____________ |
| A. | p<sub>a</sub>=K<sub>a</sub> z+K<sub>a</sub> q |
| B. | p<sub>a</sub>=K<sub>a</sub> z-K<sub>a</sub> q |
| C. | p<sub>a</sub>=K<sub>a</sub> z*K<sub>a</sub> q |
| D. | p<sub>a</sub>=K<sub>a</sub> z/K<sub>a</sub> q |
| Answer» B. p<sub>a</sub>=K<sub>a</sub> z-K<sub>a</sub> q | |
| 8. |
For the different value of , the backfill is partly submerged to height H2 and the backfill is moist to a depth H1. Find the lateral pressure intensity at the base of wall for 1> 2. |
| A. | p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>-K<sub>a2</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub> |
| B. | p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+K<sub>a2</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub> |
| C. | p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub> |
| D. | p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+K<sub>a2</sub> H<sub>2</sub> |
| Answer» C. p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub> | |
| 9. |
For the same value of , the backfill is partly submerged to height H2 and the backfill is moist to a depth H1. Find the lateral pressure intensity at the base of wall. |
| A. | p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>-K<sub>a</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub> |
| B. | p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+K<sub>a</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub> |
| C. | p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub> |
| D. | p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+K<sub>a</sub> H<sub>2</sub> |
| Answer» C. p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub> | |
| 10. |
If the angle of internal friction decreases, then Ka ___________ |
| A. | decreases |
| B. | increases |
| C. | equal to zero |
| D. | does not change |
| Answer» C. equal to zero | |
| 11. |
If free water stands on both side of a retaining wall, the lateral earth pressure is given by ____ |
| A. | p<sub>a</sub>=K<sub>a</sub> z |
| B. | p<sub>a</sub>=K<sub>a</sub> z- <sub>w</sub> z |
| C. | p<sub>a</sub>=K<sub>a</sub> z+ <sub>w</sub> z |
| D. | p<sub>a</sub>=K<sub>a</sub> z* <sub>w</sub> z |
| Answer» B. p<sub>a</sub>=K<sub>a</sub> z- <sub>w</sub> z | |
| 12. |
For a submerged backfill, the active earth pressure is given by _________ |
| A. | p<sub>a</sub>=K<sub>a</sub> z |
| B. | p<sub>a</sub>=K<sub>a</sub> z- <sub>w</sub>z |
| C. | p<sub>a</sub>=K<sub>a</sub> z+ <sub>w</sub>z |
| D. | p<sub>a</sub>=K<sub>a</sub> z* <sub>w</sub>z |
| Answer» D. p<sub>a</sub>=K<sub>a</sub> z* <sub>w</sub>z | |
| 13. |
The resultant active pressure per unit length of wall for dry backfill with no surcharge acting at _________ above the base of wall. |
| A. | H/2 |
| B. | H |
| C. | H/6 |
| D. | H/3 |
| Answer» E. | |
| 14. |
The resultant active pressure per unit length of wall for dry backfill with no surcharge is _______ |
| A. | (P_a= frac{1}{2}K_a H^2 ) |
| B. | P<sub>a</sub>= H<sup>2</sup> |
| C. | P<sub>a</sub>=K<sub>a</sub> H<sup>2</sup> |
| D. | P<sub>a</sub>=K<sub>a</sub> H<sup>2</sup> |
| Answer» B. P<sub>a</sub>= H<sup>2</sup> | |
| 15. |
For a dry backfill with no surcharge, the active earth pressure intensity is _________ |
| A. | p<sub>a</sub>=K<sub>a</sub> H |
| B. | p<sub>a</sub>= H |
| C. | p<sub>a</sub>=K<sub>a</sub> H |
| D. | p<sub>a</sub>=K<sub>a</sub> |
| Answer» B. p<sub>a</sub>= H | |