MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 higher the concentration of sodium present in the irrigation water, the lower is the risk. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
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% | |
| 3. |
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 | |
| 4. |
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 | |
| 5. |
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 | |
| 6. |
Solonchak soil is the other name for ____________ |
| A. | alkali Soils |
| B. | sodic Soils |
| C. | saline-alkali soils |
| D. | saline soils |
| Answer» E. | |
| 7. |
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 | |
| 8. |
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 | |
| 9. |
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 | |
| 10. |
The plant roots act as a semi-permeable membrane. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which is the least harmful salt for agricultural soil? |
| A. | Na<sub>2</sub>CO<sub>3</sub> |
| B. | Na<sub>2</sub>SO<sub>4</sub> |
| C. | NaCl |
| D. | NaOH |
| Answer» D. NaOH | |
| 12. |
Which among the following salt is also called black alkali? |
| A. | Na<sub>2</sub>CO<sub>3</sub> |
| B. | Na<sub>2</sub>SO<sub>4</sub> |
| C. | NaCl |
| D. | NaOH |
| Answer» B. Na<sub>2</sub>SO<sub>4</sub> | |