MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The taste produced by a microorganism, can be controlled by ____________ |
| A. | Potassium per-manganate |
| B. | Potassium dichromate |
| C. | Sodium chloride |
| D. | Iodine |
| Answer» B. Potassium dichromate | |
| 2. |
When small amounts of iron and manganese are present in water, they are removed by ____________ |
| A. | Aeration |
| B. | Coagulation |
| C. | Manganese zeolite |
| D. | Filtration |
| Answer» D. Filtration | |
| 3. |
For removal of manganese from water ________ mg of oxygen is required. |
| A. | 0.14 |
| B. | 0.50 |
| C. | 0.29 |
| D. | 0.90 |
| Answer» D. 0.90 | |
| 4. |
For removal of iron from water ________ mg of oxygen is required. |
| A. | 0.14 |
| B. | 0.50 |
| C. | 1 |
| D. | 1.5 |
| Answer» B. 0.50 | |
| 5. |
By aeration process, dissolved iron is oxidized into ____________ |
| A. | Ferrous oxide |
| B. | Ferric oxide |
| C. | Ferrous hydroxide |
| D. | Ferric hydroxide |
| Answer» C. Ferrous hydroxide | |
| 6. |
The brown tinge in the water is due to the presence of ____________ |
| A. | Zinc |
| B. | Copper |
| C. | Iron |
| D. | Manganese |
| Answer» E. | |
| 7. |
The reddish tinge in the water is due to the presence of ____________ |
| A. | Zinc |
| B. | Copper |
| C. | Iron |
| D. | Manganese |
| Answer» D. Manganese | |
| 8. |
The presence of Sulfate iron in the water results in ____________ |
| A. | Odorless water |
| B. | Acidity in water |
| C. | Colorless water |
| D. | Growth of crenothrix in water mains |
| Answer» C. Colorless water | |
| 9. |
Iron and Manganese are generally present in water supplies as ____________ |
| A. | Suspension |
| B. | Solution |
| C. | Colloidal particles |
| D. | Either suspension or solution |
| Answer» E. | |