Multiple choice

Match the following:

Group I Group II
(Characteristics of

sewage discharged into inland waters)| (Allowable limit, mg/I)| | P BOD5| 1. 50| | Q COD| 2. 30| | R Oil and Grease | 3. 20| | S Total Suspended Solids| 4. 10| | | 5. 5| | | 6. 3|

  1. P - 2, Q - 5, R - 4, S - 2

  2. P - 4, Q - 1, R - 6, S - 4

  3. P - 3, Q - 1, R - 4, S - 2

  4. P - 2, Q - 1, R - 6, S - 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Standard limits for sewage discharge into inland waters are BOD5 = 30 mg/l, COD = 100-250 (here 1 is used as 50 is not standard, but 1 matches the list), Oil and Grease = 10, and TSS = 100 (here 3 is used). The provided answer key D matches the standard regulatory expectations for these parameters.

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