Environmental Engineering — Winter 2018

Find 3 day 30 C BOD of a sewage sample whose 2 day 20 C BOD is 150 mg/lit.

Explain the growth pattern of microbes based upon mass.

Define BOD. What are the limitations of BOD test?

Explain sanitary significance of nitrate, fluoride and iron and manganese from drinking water point of view.

Give the classification of impurities present in water.

Explain different types of water demands that are to be considered while designing the water supply system of a town.

Enlist different methods of population forecasting. Find out the population of 2031 and 2041 using the data given below by any three methods of population forecasting: Year Population

What are the objective of Water (Prevention and Control of Pollution Act -1974)

Derive the first stage BOD equation with usual notations.

Explain the factors affecting self purification capacity of the river.

Explain the self purification process of the stream.

Write short note on sewage sickness.

What is house drainage system? State the principles of house drainage system

Give classification of source of air pollution.

Give the classification of air pollutants.

Explain different types of plumbing systems used for house drainage with required sketch.

What is transfer station? Why it is needed?

Give the classification, composition and characteristics of municipal solid waste.

Enumerate different air pollution control devices and explain the function of electrostatic precipitator in detail.

Explain the procedure to determine temporary and permanent hardness of water.

Explain sanitary land filling in detail with its respective merits and demerits.

Explain different measures to control noise pollution1

Explain different physical characteristics of wastewater.

Differentiate between

Domestic and Industrial wastewater. (ii) Aerobic decomposition and Anaerobic decomposition

Define 1. Sewage 2. Sullage. 3. Refuse 4. Compost 5. COD 6. Trap 7. Necrosis