MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When alum is added to the waste water containing calcium ions which compound is formed as a precipitate? |
| A. | tAl(OH)<sub>3</sub> |
| B. | tAl<sub>2</sub> (SO<sub>4</sub>)<sub>3</sub> |
| C. | tCa(OH)<sub>2</sub> |
| D. | tCaCO<sub>3</sub> |
| Answer» B. tAl<sub>2</sub> (SO<sub>4</sub>)<sub>3</sub> | |
| 2. |
What is the one disadvantage of adding chemicals to bring about precipitation? |
| A. | tThe TSS increases |
| B. | tThe TDS increases |
| C. | tBOD increases |
| D. | tIt imparts colour |
| Answer» C. tBOD increases | |
| 3. |
Out of these which is not used as a chemical coagulant? |
| A. | tAlum |
| B. | tCalcium chloride |
| C. | tFerric Chloride |
| D. | tPoly Iron Chloride |
| Answer» E. | |
| 4. |
Iron precipitation occurs at which pH? |
| A. | t1-3 |
| B. | t3-5 |
| C. | t5-7 |
| D. | t7-9 |
| Answer» E. | |
| 5. |
Macro flocculation is brought about by which phenomenon? |
| A. | tVelocity gradient |
| B. | tDifferential settling |
| C. | tBrownian movement |
| D. | tDifferential mixing |
| Answer» B. tDifferential settling | |