Environmental Engineering — Summer 2018

State the role of microorganisms in the environment.

Explain temporary and permanent hardness.

Enumerate different sources of water. Explain surface sources in sources in detail.

Differentiate between: BOD and COD.

Enlist different chemical characteristics of water and discuss about acidity with their environmental significance.

Define pH and calculate how much acidic is pH Compared to pH of 6.

Write a short note on control of water born diseases.

Write a short note on Waste water disposal by dilution.

Define: Sewage, Sullage and Sewerage.

Write a short note on Disposal of treated waste water onto land.

The 5 day 30oC BOD of sewage sample is 110mg/l. Calculate its 5 days 20oC BOD. Assume the deoxygenation constant at 20oC , K (20o) as D 0.1.

Write a short note on Aerobic Decomposition.

Discuss briefly the process of self purification of natural receiving water. Explain the oxygen sag curve with sketch.

Write short note on Composting.

What is solid waste management? State the composition and characteristics of the municipal solid waste.

Write short note on Incineration.

Classify the traps according to shape and describe with sketch the same.

Define: Vent pipe, Rainwater pipe, Anti-siphonage pipe

What is dB? Explain the effects of noise pollution.

Write note on EIA.

Write short note on Sanitary landfilling.

Schematically describe different systems of plumbing with their constructional precautions.1

Write short note on Electrostatic Precipitators.

Write short note on Environmental (Protection) Act.

What is air pollution? Discuss its effects on human, animal and plants.2