engineering recuitment WBPSC JE Civil Mock Test 2022 Environmental Engineering Quality and Characteristics of Sewage

300 mg/L ग्लूकोज विलयन की सैद्धांतिक ऑक्सीजन मांग क्या है?

1

320 mg/L

2

360 mg/L

3

380 mg/L

4

400 mg/L

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