engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Environmental Engineering Design of Sewer
Consider the following statements.
A. Avoid building up of sewer gases
B. Ensure atmospheric pressure in the wastewater surface
C. Ensure the safety of sewer maintenance people
D. Provide oxidation facility to sewage
Which of these statements correctly suggest why ventilation of sewer lines is necessary?
1
Only A, B and C
2
Only A, C and D
3
Only B, C and D
4
Only A, B and D