In the treatment of water lime soda process is used for removing

If the methyl orange alkalinity of water equals or exceed total hardness, all of the hardness is

Which of the following treatments reduce the salinity of water?

The standard EDTA (Ethylene Diamene Tetra Acetic Acid)solution is used to determine:

Suspended Impurities Consists of:

Disease which is not a water born disease is:

Odour is meonused in terms of:

To test turbidity of polluted waterin the field.................. is used)

The colour of water is measured on

Maximum consumption of water is noticed in:

The colour of water is measured on:

The maximum permissible chlorine contents for public supplies should be between:

The desirable limit of chloride content as per BIS standards in water for domestic supplies should not exceed:

The bacteria that can survive in the presence and absence of oxygen are called

If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D of the sewage is:

In case of public supplies, the maximum permissible nitrite content is:

Which method is used to measure the colour of water?

Which one of the following processes of water softening requires recarbonation?

Zero hardness of water is achieved by ..........................

The pH value of portable water should be:

Potassium permanganate is used in water for make it

Both fish life and algae are present in the river zone known as:

Symbiosis, the beneficial association between algae & bacteria is used for treatment of waste water in the following unit:

Minimum D.O prescribed for a river stream, to avoid fish kill is:

In biological treatment there is formation of a biological film of:

Humidity is measured by:

The acceptable range of pH for potable water:

The pH value of strong caustic soda is about

The permissible turbidity of drinking water is :

Method of removing permanent hardness

Temporary hardness is due to the presence of :