The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by_______________?

Related Mcqs:

The hourly variation factor is usually taken as______________?

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

The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is________________?

A. circle method B. equivalent pipe method C. electrical analysis method D. Hardy cross method...

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...

Sewage treatment units are designed for_______________?

A. maximum flow only B. minimum flow only C. average flow only D. maximum and minimum flow...

The velocity of flow of water in a sedimentation tank is about__________________?

A. 5 to 10 cm/sec. B. 15 to 30 cm/sec. C. 15 to 30 cm/minute D. 15 to 30 cm/hour...