engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Environmental Engineering Quality and Characteristics of Sewage
One litre of sewage when allowed to settle for 30 minutes gives a sludge volume of 30 cm3. If the dry weight of this sludge is 3.0 gms, then the sludge volume Index will be:
1
20 g/L
2
30 g/mL
3
10 mL/g
4
40 mL/g