MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Determine the size of a flash mixer for the following data. Round off to the nearest digit.Flow rate: 2200 m3/hr |
| A. | t37 m<sup>3</sup> |
| B. | t73 m<sup>3</sup> |
| C. | t367 m<sup>3</sup> |
| D. | t183 m<sup>3</sup> |
| Answer» B. t73 m<sup>3</sup> | |
| 2. |
Calculate the volume of flocculator for the following data:Flow rate: 500m3/hr |
| A. | t355 m<sup>3</sup> |
| B. | t155 m<sup>3</sup> |
| C. | t167 m<sup>3</sup> |
| D. | t285 m<sup>3</sup> |
| Answer» D. t285 m<sup>3</sup> | |
| 3. |
Calculate the volume of flocculator for the following data:Flow rate: 2200m3/hr |
| A. | t733 m<sup>3</sup> |
| B. | t855 m<sup>3</sup> |
| C. | t933 m<sup>3</sup> |
| D. | t785 m<sup>3</sup> |
| Answer» B. t855 m<sup>3</sup> | |
| 4. |
Addition of which of these result in lowering the BOD level? |
| A. | tLime |
| B. | tPolymer |
| C. | tAluminum salts |
| D. | tFerrous salts |
| Answer» C. tAluminum salts | |
| 5. |
At what pH is the solubility of FePO4 minimum? |
| A. | t3 |
| B. | t5.3 |
| C. | t4.3 |
| D. | t6.3 |
| Answer» C. t4.3 | |
| 6. |
At what pH is the solubility of AlPO4 minimum? |
| A. | t8 |
| B. | t6.3 |
| C. | t9.5 |
| D. | t10 |
| Answer» C. t9.5 | |
| 7. |
What is the ratio of Alum/Phosphate while adding alum to a waste water in order to remove the phosphates present? |
| A. | t1.4 : 2.5 |
| B. | t1 : 2 |
| C. | t3:5 |
| D. | t5:7 |
| Answer» B. t1 : 2 | |
| 8. |
What is the test used to select the type of coagulant required/ |
| A. | tBar test |
| B. | tJar test |
| C. | tStock test |
| D. | tCoagulant test |
| Answer» C. tStock test | |