Civil Engineering : Environmental Engineering QUESTIONS AND ANSWERS :: part5 : 6 to 10
Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by |
| TOD>BOD>COD |
| TOD>COD>BOD |
| BOD>COD>TOD |
| COD>BOD>TOD |
7.Which of the following retards the self purification of stream ? |
| higher temperature |
| sunlight |
| satisfying oxygen demand |
| none of the above |
8.The ratio of 5 day BOD to ultimate BOD is about |
| 1/3 |
| 2/3 |
| 3/4 |
| 1.0 |
9.The effect of increasing diameter of sewer on the self cleansing velocity is |
| to decrease it |
| to increase it |
| fluctuating |
| nil |
10.The pathogens can be killed by |
| nitrification |
| chlorination |
| oxidation |
| none of the above |
More Environmental Engineering QUESTIONS AND ANSWERS available in next pages
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