MCQOPTIONS
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MCQOPTIONS
This section includes 14 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 reoxygenation constant at temperature ‘T’ is expressed by ___________ |
| A. | KRT = KR20 (1.016)T |
| B. | KRT = KR20 (1.047) T-20 |
| C. | KRT = KR20 (1.016)T-20 |
| D. | KRT = KR20 (1.047)T |
| Answer» D. KRT = KR20 (1.047)T | |
| 2. |
Rate of aeration is independent of the D.O content of wastewater.Figure: Oxygen sag curve |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
When the BOD of wastewater increases, then?Figure: Oxygen sag curve |
| A. | Rate of reaeration decreases |
| B. | Rate of oxygen deficit increases |
| C. | Rate of oxygen deficit decreases |
| D. | Amount of oxygen in wastewater increases |
| Answer» C. Rate of oxygen deficit decreases | |
| 4. |
The oxygen deficit is maximum when?Figure: Oxygen sag curve |
| A. | Rate of reaeration is 0 |
| B. | Rate of deoxygenation is 0 |
| C. | Rate of reaeration equals the rate of deoxygenation |
| D. | Rate of reaeration > rate of deoxygenation |
| Answer» D. Rate of reaeration > rate of deoxygenation | |
| 5. |
Which of the following represents the oxygen sag curve in the following figure?Figure: Oxygen sag curve |
| A. | Dotted blue line |
| B. | Green curve |
| C. | Yellow curve |
| D. | Red curve |
| Answer» E. | |
| 6. |
The maximum deficiency of dissolved oxygen is represented by ____________Figure: Oxygen sag curve |
| A. | Dotted blue line |
| B. | Green curve |
| C. | Yellow curve |
| D. | Violet curve |
| Answer» B. Green curve | |
| 7. |
Which of the following is represented by the green curve in the following figure?Figure: Oxygen sag curve |
| A. | Deoxygenation curve |
| B. | Reoxygenation curve |
| C. | Oxygen sag curve |
| D. | Equilibrium concentration of oxygen |
| Answer» C. Oxygen sag curve | |
| 8. |
What is yellow curve represents in the following figure?Figure: Oxygen sag curve |
| A. | Deoxygenation curve |
| B. | Reoxygenation curve |
| C. | Oxygen sag curve |
| D. | Equilibrium concentration of oxygen |
| Answer» B. Reoxygenation curve | |
| 9. |
When the BOD of wastewater increases, the? |
| A. | Rate of reaeration decreases |
| B. | Rate of oxygen deficit increases |
| C. | Rate of oxygen deficit decreases |
| D. | Amount of oxygen in wastewater increases |
| Answer» D. Amount of oxygen in wastewater increases | |
| 10. |
The oxygen deficit is maximum when |
| A. | Rate of reaeration is 0 |
| B. | Rate of deoxygenation is 0 |
| C. | Rate of reaeration equals the rate of deoxygenation |
| D. | Rate of reaeration > rate of deoxygenation |
| Answer» C. Rate of reaeration equals the rate of deoxygenation | |
| 11. |
Which of the following represents the oxygen sag curve? |
| A. | Dotted blue line |
| B. | Green curve |
| C. | Yellow curve |
| D. | Red curve |
| Answer» C. Yellow curve | |
| 12. |
The maximum deficiency of dissolved oxygen is represented by |
| A. | Dotted blue line |
| B. | Green curve |
| C. | Yellow curve |
| D. | Violet curve |
| Answer» D. Violet curve | |
| 13. |
Which of the following is represented by the green curve? |
| A. | Deoxygenation curve |
| B. | Reoxygenation curve |
| C. | Oxygen sag curve |
| D. | Equilibrium concentration of oxygen |
| Answer» E. | |
| 14. |
The yellow curve represents |
| A. | Deoxygenation curve |
| B. | Reoxygenation curve |
| C. | Oxygen sag curve |
| D. | Equilibrium concentration of oxygen |
| Answer» B. Reoxygenation curve | |