Biochemical Oxygen Demand (BOD5) test of wastewater sample is standardly carried out at a temperature of:
A15°C for 5 days
B20°C for 5 days
C25°C for 3 days
D37°C for 24 hours
Explanation
Standard BOD5 test measures dissolved oxygen consumed by microorganisms incubating at 20°C for 5 days.

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