Table of Contents
Choose the correct options for the following questions.
COD is termed for:
Difficulty: Easy
A:
Dissolved oxygen
B:
Biochemical oxygen demand
C:
Chemical oxygen demand
D:
All of these
Range of DO is (in ppm):
Difficulty: Easy
A:
1-4
B:
1-3
C:
4-8
D:
4-7
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