The ratio of oxygen available to the oxygen required for stabilisation of sewage

The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the

Maximum permissible turbidity in potable water is __________ ppm.

Maximum permissible turbidity in potable water is __________ ppm.

Reinglemann chart is used for the measurement of the

Reinglemann chart is used for the measurement of the

Phenolic water generated in coke ovens & by-product plant of a steel plant are d

Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

Aerosols present in atmospheric air may be

Aerosols present in atmospheric air may be

Presence of nitrates in water in excess of 50 ppm causes

Presence of nitrates in water in excess of 50 ppm causes

Fresh domestic sewage is __________ in color.

Fresh domestic sewage is __________ in color.

The resistance of water to the passage of light through it is a measure of the

The resistance of water to the passage of light through it is a measure of the

Maximum permissible residual chlorine in treated water should be __________ mg/l

Maximum permissible residual chlorine in treated water should be __________ mg/litre.

Moist atmospheric air at high temperature (e.g., in summer) having high concentr

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

Carbonaceous particles having size less than 1 μm are called

Carbonaceous particles having size less than 1 μm are called

Ozone is

Ozone is