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This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Irrigation Engineering knowledge and support exam preparation. Choose a topic below to get started.
1. |
The seepage forces within the filter are controlled up to permissible small magnitudes when the ratio of D15 of filter to D15 of base material is ___________________ |
A. | between 5 to 40 |
B. | less than 5 |
C. | between 5 to 20 |
D. | less than 4 |
Answer» B. less than 5 | |
2. |
Which of the following is not provided in order to control the possibility of sand boiling? |
A. | Relief wells |
B. | Drain trenches |
C. | Vertical cut-offs |
D. | Berms |
Answer» D. Berms | |
3. |
According to Terzaghi, the ratio of D15 of filter to D15 of base material should be _____________ |
A. | > 5 |
B. | < 4 |
C. | 4 to 5 |
D. | < 5 |
Answer» D. < 5 | |
4. |
On moderate foundations and particularly in seismic areas, the type of dam which can preferably be considered for construction is ___________________ |
A. | masonry gravity dam |
B. | earthen dam |
C. | rock-fill dam |
D. | arch dam |
Answer» D. arch dam | |
5. |
The base width of a rock-fill dam in comparison to that of an earthen dam is _______________ |
A. | much larger |
B. | much smaller |
C. | sometimes large sometimes smaller |
D. | almost equal |
Answer» C. sometimes large sometimes smaller | |
6. |
During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________ |
A. | chimney drain |
B. | rock toe |
C. | drain trench along the downstream toe |
D. | upstream impervious cut-off |
Answer» D. upstream impervious cut-off | |