Water filtration rate in a slow sand filter ranges from ____________ litres/m2/hr?

Related Mcqs:

The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?

A. Catalytic conversion B. Green house effect C. Global warming D. Both B. and C....

Iron & manganese present as pollutant in water cannot be removed by__________________?

A. Ion exchange process B. Oxidation followed by settling & filtration C. Lime soda process or manganese zeolite process D. Chlorination...

Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?

A. NOx B. Hg C. SO2 D. F...

The progressive warming up of the earth’s surface is mainly due to the___________________?

A. Automobile exhaust B. Blanketing effect of CO2 in the atmosphere C. De-forestation D. Thickening of ozone layer...

Pick out the wrong statement ?

A. Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value B. Environmental pollution by NOx emission is much higher by four stroke petrol engines as compared to the two stroke engines C. Temperature in stratosphere rises with increasing altitude D. The characteristic of a green … Pick out the wrong statement ?Read More...