Dissolved oxygen in streams is______________?

Related Mcqs:

The hourly variation factor is usually taken as______________?

A. 1.5 B. 1.8 C. 2.0 D. 2.7...

The length of rectangular sedimentation tank should not be more than_______________?

A. B B. 2B C. 4B D. 8B where B is the width of the tank...

In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be___________?

A. 100 ppm B. 200 ppm C. 300 ppm D. 400 ppm...

For normal sludge, the value of sludge index for Indian conditions is________________?

A. 0 to 50 B. 50 to 150 C. 150 to 350 D. 350 to 500...

For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be________________?

A. separate system B. combined system C. partially combined system D. partially separate system...