MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
Which is the fastest method of drilling and especially useful in unconsolidated formations? |
| A. | Cable tool method |
| B. | Water-jet boring method |
| C. | Hydraulic Rotary method |
| D. | Reverse Rotary method |
| Answer» D. Reverse Rotary method | |
| 2. |
Which drilling method is best suited for underground formations made of gravel, sand and clayey deposits? |
| A. | Percussion drilling |
| B. | Wash boring method |
| C. | Rotary boring method |
| D. | Reverse rotary method |
| Answer» C. Rotary boring method | |
| 3. |
Which of the following drilling method is unsuitable in loose formations such as unconsolidated sand and gravel or quicksand? |
| A. | Percussion drilling |
| B. | Wash boring method |
| C. | Rotary boring method |
| D. | Reverse rotary method |
| Answer» B. Wash boring method | |
| 4. |
Bored tube wells in rocky consolidated formations as are encountered in the South Indian States of our country are usually drilled by _____________ |
| A. | rotary drilling rigs |
| B. | percussion drilling rigs |
| C. | down the hole hammer (DTH) rigs |
| D. | cable method of drilling |
| Answer» D. cable method of drilling | |
| 5. |
A tube well is suitable when the subsoil formation is made up of _____________________ |
| A. | cracked and faulted rock |
| B. | alluvium |
| C. | alluvium and various layers of sandy soil, clayey soil, and gravel |
| D. | clayey soil |
| Answer» D. clayey soil | |
| 6. |
The efficiency of the centrifugal pumps commonly used for lifting water from wells may be of the order of _____________ |
| A. | 30% |
| B. | 65% |
| C. | 90% |
| D. | 95% |
| Answer» C. 90% | |
| 7. |
For good design, the uniformity coefficient (Cu) of the gravel material should preferably be ______ |
| A. | > 2.0 |
| B. | < 2.0 |
| C. | > 2.5 |
| D. | < 2.5 |
| Answer» E. | |
| 8. |
According to the Central Board of Irrigation and Power, the PA ratio for graded aquifer should be _______________ |
| A. | 9 12.5 |
| B. | 12 15.5 |
| C. | > 15.5 |
| D. | < 9 |
| Answer» C. > 15.5 | |
| 9. |
What is Pack Aquifer Ratio? |
| A. | D<sub>50</sub> of the gravel / D<sub>50</sub> of the aquifer |
| B. | D<sub>50</sub> of the aquifer / D<sub>50</sub> of the gravel |
| C. | D<sub>60</sub> of the aquifer material / D<sub>10</sub> of the aquifer material |
| D. | D<sub>60</sub> of the gravel / D<sub>10</sub> of the aquifer |
| Answer» B. D<sub>50</sub> of the aquifer / D<sub>50</sub> of the gravel | |
| 10. |
What is the measure of the fineness of an aquifer? |
| A. | Average grain size |
| B. | Effective diameter |
| C. | Mean particle size |
| D. | Uniformity coefficient |
| Answer» C. Mean particle size | |
| 11. |
In cavity tubewell, there is a possibility of water tapping through sides and the flow is radial. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following tubewell is suitable when a deep bearing stratum lies below an impervious layer and water contribution can take place through bottom only? |
| A. | Strainer type tubewell |
| B. | Abyssinian tubewell |
| C. | Cavity type tubewell |
| D. | Slotted type tubewell |
| Answer» D. Slotted type tubewell | |
| 13. |
The general average yield from standard tube wells is of order of____________ |
| A. | 5 L/sec |
| B. | 50 L/sec |
| C. | 500 L/sec |
| D. | 5000 L/sec |
| Answer» C. 500 L/sec | |
| 14. |
The most widely used type of a deep state tube well in India is __________ |
| A. | cavity well |
| B. | strainer tube well |
| C. | slotted pipe gravel packed tube well |
| D. | both cavity and strainer tube well |
| Answer» C. slotted pipe gravel packed tube well | |