MCQOPTIONS
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MCQOPTIONS
This section includes 16 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 recirculation factor in a low rate trickling filter is ___________ |
| A. | 0 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» C. 10 | |
| 2. |
The hydrogen sulfide gas formed during the filtration of sewage can be removed by ___________ |
| A. | Carbonation |
| B. | Chlorination |
| C. | Addition of lime |
| D. | Titration with potassium dichromate |
| Answer» C. Addition of lime | |
| 3. |
The organic loading in a trickling filter is measured in ___________ |
| A. | m3/day |
| B. | gm/m2/day |
| C. | Kg/hectare-meter/day |
| D. | Kg/hectare/day |
| Answer» D. Kg/hectare/day | |
| 4. |
The removal of BOD is independent of the loading conditions in infiltration process. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
The efficiency of a percolating filter is given by ___________ |
| A. | 100/(1+0.0044 (μ)) |
| B. | 100/(1+0.044 (μ) 1/2) |
| C. | 100/(1+0.44 (μ) 1/2) |
| D. | 100/(1+0.0044 (μ) 1/2) |
| Answer» E. | |
| 6. |
The BOD after the filtration of sewage from the low rate trickling filter is ___________ |
| A. | 40-50% |
| B. | 80-90% |
| C. | 70-80% |
| D. | 90-99% |
| Answer» C. 70-80% | |
| 7. |
The minimum hydraulic loading of percolating filter is ___________ |
| A. | 1 m3/m2/day |
| B. | 2 m3/m2/day |
| C. | 3 m3/m2/day |
| D. | 4 m3/m2/day |
| Answer» B. 2 m3/m2/day | |
| 8. |
THE_HYDROGEN_SULFIDE_GAS_FORMED_DURING_THE_FILTRATION_OF_SEWAGE_CAN_BE_REMOVED_BY?$ |
| A. | Carbonation |
| B. | Chlorination |
| C. | Addition of lime |
| D. | Titration with potassium dichromate |
| Answer» C. Addition of lime | |
| 9. |
The_recirculation_factor_in_a_low_rate_trickling_filter_is$ |
| A. | 0 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» C. 10 | |
| 10. |
The organic loading in a trickling filter is measured i? |
| A. | m<sup>3</sup>/day |
| B. | gm/m<sup>2</sup>/day |
| C. | Kg/hectare-meter/day |
| D. | Kg/hectare/day |
| Answer» D. Kg/hectare/day | |
| 11. |
The organic loading in low rate trickling filter is 900 kg/hectare-meter/day. What is the efficiency of the filter? |
| A. | 43.1% |
| B. | 88.3% |
| C. | 7.04% |
| D. | 83% |
| Answer» C. 7.04% | |
| 12. |
The efficiency of a percolating filter is given by |
| A. | 100/(1+0.0044 (μ)) |
| B. | 100/(1+0.044 (μ)<sup> 1/2</sup>) |
| C. | 100/(1+0.44 (μ) <sup>1/2</sup>) |
| D. | 100/(1+0.0044 (μ) <sup>1/2</sup>) |
| Answer» E. | |
| 13. |
The BOD after the filtration of sewage from the low rate trickling filter is |
| A. | 40-50% |
| B. | 80-90% |
| C. | 70-80% |
| D. | 90-99% |
| Answer» C. 70-80% | |
| 14. |
Which of the following is called as a conventional trickling filter? |
| A. | Rapid sand filter |
| B. | Slow sand filter |
| C. | High rate trickling filter |
| D. | Low rate trickling filter |
| Answer» E. | |
| 15. |
The minimum hydraulic loading of percolating filter is |
| A. | 1 m<sup>3</sup>/m<sup>2</sup>/day |
| B. | 2 m<sup>3</sup>/m<sup>2</sup>/day |
| C. | 3 m<sup>3</sup>/m<sup>2</sup>/day |
| D. | 4 m<sup>3</sup>/m<sup>2</sup>/day |
| Answer» B. 2 m<sup>3</sup>/m<sup>2</sup>/day | |
| 16. |
The breaking of the biomass from the slime layer in conventional filter is called _____ |
| A. | Sloughing |
| B. | Carbonation |
| C. | Biological magnification |
| D. | Weathering |
| Answer» B. Carbonation | |