Download PTU B.Tech 2020 March Civil 6th Sem BTCE 606 Environmental Engineering Ii Question Paper

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Roll No. Total No. of Pages : 02

Total No. of Questions : 09

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B.Tech.(CE) (2012 to 2017) (Sem.-6)

ENVIRONMENTAL ENGINEERING-II

Subject Code : BTCE-606

M.Code : 71087

Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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1. Answer briefly :
   1. What is combined system?
   2. Define Time of concentration.
   3. What is anaerobic decomposition?
   4. Mention two difference between domestic sewage and industrial sewage composition.
   5. What is BOD kinetics?

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   6. What is sludge stabilization?
   7. Define Total Organic Carbon.
   8. What are the various systems of plumbing in a building?
   9. Mentions the locations where you need to provide inspection chamber.
   10. What is macrophyte pond?

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SECTION-B

1. What are the requirements of sewage pumping stations?
2. A town having population of 40,000 disposes sewage by land treatment. It gets a per capita assured water supply @ 130 litres/day. Assuming that the land used for sewage disposal can absorb 80m³ of sewage per hectare per day, determine the land area required.
3. Discuss the trickling filter unit details and how does it work.

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4. Discuss nutrient removal and polishing of waste water.
5. Draw a treatment plant for a municipal waste water discharging to a river. Discuss the importance of each unit.

SECTION-C

1. Write short notes on :
   1. Drop manhole;
   2. Street inlets

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2. A city discharges 125 m³/sec of sewage into a perennial river which is fully saturated with oxygen and flows at a minimum rate of 1600 m³/sec with a minimum velocity of 0.12 m/sec. If 5-day BOD5 of the sewage is 300mg/l, find out where the critical DO will occur in the river. Assume; the coefficient for purification of river is 4.0, the coefficient of DO is 0.11, and the ultimate BOD is 125% of the 5-day BOD of the mixture of sewage and river water.
3. Design a septic tank for a small colony of 150 persons provided with an assured water supply from the municipal authority @ 120 litres/person/day. Assume any suitable data if required.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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