MCQOPTIONS
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MCQOPTIONS
This section includes 51 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 land is made to be sloped towards the ditches. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 2. |
Which of the following factor do not contribute to water-logging? |
| A. | Inadequate drainage |
| B. | Seepage from unlined canals |
| C. | Frequent flooding |
| D. | Excessive tapping of groundwater |
| Answer» E. | |
| 3. |
Which of the following is a remedial measure for water-logging? |
| A. | Controlling seepage from the canals |
| B. | By lowering the F.S.L of the canals |
| C. | Quick disposal of rainwater |
| D. | Installation of lift irrigation systems |
| Answer» E. | |
| 4. |
Waterlogging is the rise of water table. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 5. |
Which factor is concerned with the growth of weeds? |
| A. | Excessive Rains |
| B. | Submergence due to Floods |
| C. | Over and Intensive Irrigation |
| D. | Seepage of Water through the Canals |
| Answer» C. Over and Intensive Irrigation | |
| 6. |
The phenomenon of water-logging can be best understood with the help of a Hydrologic equation. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 7. |
The higher the concentration of sodium present in the irrigation water, the lower is the risk. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 8. |
Swampy land is ________ |
| A. | ill-aerated land |
| B. | the land where cultivation operations are impossible |
| C. | land having deposition of alkali salts in the root zone of the crops |
| D. | saline land |
| Answer» C. land having deposition of alkali salts in the root zone of the crops | |
| 9. |
When a canal is taken as an example what factor about it causes waterlogging? |
| A. | Seepage of Water from the High Lands |
| B. | Seepage of Water through the Canals |
| C. | Over and Intensive Irrigation |
| D. | Excessive Rains |
| Answer» C. Over and Intensive Irrigation | |
| 10. |
Seepage of water from the adjoining highlands causes waterlogging. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 11. |
Which one of the following is not a remedial measure for waterlogging? |
| A. | Good drainage for irrigated land |
| B. | Conjunctive use of water in the basin |
| C. | The lining of canals and watercourses |
| D. | Contour bunding |
| Answer» E. | |
| 12. |
Solonchak soil is the other name for ____________ |
| A. | alkali Soils |
| B. | sodic Soils |
| C. | saline-alkali soils |
| D. | saline soils |
| Answer» E. | |
| 13. |
If the salt concentration of the soil water (saturation extract) in milli-mhos/cm is in between 4.5 – 9, then what is the salinity of the soil? |
| A. | Non-saline |
| B. | Slightly saline |
| C. | Medium saline |
| D. | Highly saline |
| Answer» C. Medium saline | |
| 14. |
Which factor comes into play when less permeable substratum is present? |
| A. | Flat Topography |
| B. | Impervious Obstruction |
| C. | Excessive Rains |
| D. | Inadequate Natural Drainage |
| Answer» E. | |
| 15. |
What is Solonetz soil? |
| A. | White alkali soil |
| B. | Black alkali soil |
| C. | Highly saline soil |
| D. | Non-saline soil |
| Answer» C. Highly saline soil | |
| 16. |
Which factor leads to waterlogging due to obstruction? |
| A. | Inadequate Natural Drainage |
| B. | Flat Topography |
| C. | Impervious Obstruction |
| D. | Over and Intensive Irrigation |
| Answer» D. Over and Intensive Irrigation | |
| 17. |
Salinity increases the osmotic activity of the plants. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 18. |
Which factor causing waterlogging suggests extensive irrigation? |
| A. | Impervious Obstruction |
| B. | Excessive Rains |
| C. | Over and Intensive Irrigation |
| D. | Seepage of Water from High Lands |
| Answer» D. Seepage of Water from High Lands | |
| 19. |
Estimate the leaching requirement when electrical conductivity (EC) value of a saturated extract of soil is 10 m mho/cm at 25% reduction in the yield of the crop. The EC of irrigation water is 1.5 m mho/cm. |
| A. | 15% |
| B. | 6.66% |
| C. | 7.5% |
| D. | 10% |
| Answer» D. 10% | |
| 20. |
Which factor depends upon the depressions of the terrain and causes water logging? |
| A. | Irregular Topography |
| B. | Impervious Obstruction |
| C. | Inadequate Surface Drainage |
| D. | Excessive Rains |
| Answer» B. Impervious Obstruction | |
| 21. |
What is the name given to the drains used in depressions? |
| A. | Shallow Surface Drains |
| B. | Deep Surface Drains |
| C. | Open Drains |
| D. | Drains |
| Answer» B. Deep Surface Drains | |
| 22. |
How many types of structures can be constructed in the fields to remove excess waters? |
| A. | 5 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 23. |
A soil sample has an Exchangeable sodium percentage (ESP) of 16%, its electrical conductivity is 3.2 Milli-Mohs/cm and a pH of 9.5. How is the soil classified? |
| A. | Saline soil |
| B. | Saline-alkaline soil |
| C. | Alkaline soil |
| D. | Non-saline soil |
| Answer» D. Non-saline soil | |
| 24. |
What factor creates temporary and continuous waterlogging? |
| A. | Submergence due to Floods |
| B. | Flat Topography |
| C. | Impervious Obstruction |
| D. | Excessive Rains |
| Answer» E. | |
| 25. |
Shallow surface drains are connected to outlet drains. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 26. |
Due to inadequate drainage which factor causes waterlogging with constant percolation? |
| A. | Over and Intensive Irrigation |
| B. | Impervious Obstruction |
| C. | Inadequate Surface Drainage |
| D. | Flat Topography |
| Answer» D. Flat Topography | |
| 27. |
What are the three classes of salty soil? |
| A. | Saline soil, Saline-alkali soil, Non-saline soil |
| B. | Saline soil, Alkali soil, Non-saline soil |
| C. | Saline soil, Alkali soil, Saline-alkali soil |
| D. | Alkali soil, Non-saline soil, Saline-alkali soil |
| Answer» D. Alkali soil, Non-saline soil, Saline-alkali soil | |
| 28. |
Which among the following salt is also called black alkali? |
| A. | Na₂CO₃ |
| B. | Na₂SO₄ |
| C. | NaCl |
| D. | NaOH |
| Answer» B. Na₂SO₄ | |
| 29. |
Which is the least harmful salt for agricultural soil? |
| A. | Na₂CO₃ |
| B. | Na₂SO₄ |
| C. | NaCl |
| D. | NaOH |
| Answer» D. NaOH | |
| 30. |
Alkali soils are reclaimed by ___________ |
| A. | leaching of soil |
| B. | using limestone as a soil amendment |
| C. | using gypsum as a soil amendment |
| D. | provision of drainage |
| Answer» D. provision of drainage | |
| 31. |
The plant roots act as a semi-permeable membrane. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 32. |
If the salt concentration of the irrigation water ranges from 0.5 – 2 g/L, then what is the restriction on its use? |
| A. | No restriction on its use |
| B. | It should be used with appropriate water management practices |
| C. | It is not generally advised for use unless consulted with specialists |
| D. | No dependency on the salt concentration |
| Answer» C. It is not generally advised for use unless consulted with specialists | |
| 33. |
How many cubic metres of water will be removed for this particular period of a system designed to use a D.C of 1.5 cm draining 20 hectares for a capacity of 5 days? |
| A. | 10000 m³ |
| B. | 25000 m³ |
| C. | 15000 m³ |
| D. | 20000 m³ |
| Answer» D. 20000 m³ | |
| 34. |
What structure is surrounded around the tile drains when used in less pervious strata? |
| A. | Envelope Filters |
| B. | French Drains |
| C. | Beehive Grate |
| D. | Surface Inlet |
| Answer» B. French Drains | |
| 35. |
Which type of alternate layouts system for tile drainage has two mains? |
| A. | Grid Iron System |
| B. | Natural System |
| C. | Double main System |
| D. | Herring Bone System |
| Answer» D. Herring Bone System | |
| 36. |
Under what strata the tile drainage should not be placed? |
| A. | In Shallow Depths |
| B. | More Pervious Strata |
| C. | Less Pervious Strata |
| D. | Pervious Strata |
| Answer» D. Pervious Strata | |
| 37. |
What is the size of the tile at an outlet of a 12 hectare drainage system, if the D.C is 2 cm and the tile grade is 0.5%. Assume the rugosity coefficient as 0.015 for the tile drain material. |
| A. | 10 cm |
| B. | 20 cm |
| C. | 15 cm |
| D. | 25 cm |
| Answer» C. 15 cm | |
| 38. |
How can tile drainage help to increase crop yields? |
| A. | Increases Free Gravity Water |
| B. | Increases Volume of Soil |
| C. | Decrease Air Circulation |
| D. | Increases Water Table Level |
| Answer» C. Decrease Air Circulation | |
| 39. |
For maximum productivity of crops both surface and sub-surface drains are sometimes needed. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 40. |
Tile drainage helps to reduce soil erosion. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 41. |
In what chemical ways does tile drainage help in plant growth? |
| A. | Decreases Alkalinity of Soils |
| B. | Increases salinity of Soils |
| C. | Increases Nitrogen |
| D. | Reduces and Removes Toxic Substances |
| Answer» E. | |
| 42. |
Which type of soils is benefited by using tile drainage? |
| A. | Dry Soils |
| B. | Black Soils |
| C. | Wet Soils |
| D. | Red Soils |
| Answer» D. Red Soils | |
| 43. |
Which type of drains is used for small quantity of waters removal? |
| A. | Blind Inlet |
| B. | Shallow Surface Drains |
| C. | Deep Surface Drains |
| D. | Open Drains |
| Answer» B. Shallow Surface Drains | |
| 44. |
In surface inlet what is provided to deal with trash? |
| A. | Cunnette |
| B. | Beehive Grate |
| C. | Surface Inlet |
| D. | Blind Inlet |
| Answer» C. Surface Inlet | |
| 45. |
What is the cross sectional shape of shallow surface drains? |
| A. | Triangular Shape |
| B. | Circular Shape |
| C. | Rectangular Shape |
| D. | Trapezoidal Shape |
| Answer» E. | |
| 46. |
What structure is constructed to carry back into the underground? |
| A. | Land Grading |
| B. | Random Field Drains |
| C. | Surface Inlet |
| D. | Open Drains |
| Answer» D. Open Drains | |
| 47. |
Which type of open drains would be fully operative only in rainy season? |
| A. | Shallow Surface Drains |
| B. | Deep Surface Drains |
| C. | French Drain |
| D. | Drains |
| Answer» C. French Drain | |
| 48. |
A land is said to be water-logged when _______________ |
| A. | the aeration is stopped in the root zone due to the rise in water content |
| B. | there is a reduction in crop yield |
| C. | there is an accumulation of alkali salts in the root zone of the crop |
| D. | there is salinity in the soil |
| Answer» B. there is a reduction in crop yield | |
| 49. |
Presence of excessive moisture retards the bacterial activities affecting crop growth. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 50. |
What is the pH range for strongly alkaline soils? |
| A. | 7.4 – 7.8 |
| B. | 7.9 – 8.4 |
| C. | 8.5 – 9.0 |
| D. | > 9 |
| Answer» D. > 9 | |