Environmental Engineering

Suspended solids are measured by which of the following?

• Turbidity rod

• Gravimetric test

• Chromatography

• Jackson’s turbidity meter

The maximum permissible limit for suspended solids is ____________

• 10 mg/l

• 20 mg/l

• 30 mg/l

• 40 mg/l

Which method is used to measure the color of water?

• Gravimetric analysis

• Chromatography

• Tintometer method

• Hydrometer analysis

1 TCU (True Color Unit) is equivalent to _____

• The color produced by 1 g of platinum cobalt

• The color produced by 1 mg of platinum cobalt

• The color produced by 1 mg of platinum cobalt in 1L of distilled water

• The color produced by 1 mg of platinum cobalt in 1mL of distilled water

Which of the following statement is wrong regarding turbidity?

• It is an extent to which light is absorbed by particles in the water

• It is expressed in ppm

• It depends on the fineness of particle present in the water

• Turbidity rod is a laboratory method to measure turbidity

In which unit operation, gases are released or absorbed in the water?

• Gas transfer

• Ion transfer

• Solute stabilization

• Solids Transfer

Which of the following process is used to remove the colloidal particles from water?

• Chemical precipitation

• Chemical coagulation

• Ion exchange

• Adsorption

Flocculation of iron from water by the addition of lime is an example of which of the following process?

• Chemical precipitation

• Chemical coagulation

• Ion exchange

• Adsorption

Organic contaminants are removed from the water by the process of ______

• Water softening

• Demineralization

• Absorption

• Adsorption

Which of the following represents the physical characteristics of water?

• Chloride content

• BOD

• Turbidity

• COD