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Previous Year Exam Questions for Environment Studies - ENV of 2015 - NITRKL by SANTOSH KUMAR PRADHAN

  • Environment Studies - ENV
  • 2015
  • PYQ
  • NIT ROURKELA - NITRKL
  • Civil Engineering
  • B.Tech
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NATIONAL INSTITUTE OF TECHNOLOGY, ROURKELA Mid Autumn Semester Examination-2015 B.Tech 2nd Semester Environment and Safety Engineering (ESE) Subject code- CE-130 Full Marks – 30 Time allotted- 2 hours Answer Any THREE Questions from Group A. Answer ALL Questions from Group B. Assume any relevant data, if required. Answers for Group – A and Group – B should be written on separate pages. Assume any relevant data, if required. Figures at the right hand margin indicate marks. Q. N. Marks GROUP - A 1a Calculate the carbonate and non-carbonate hardness of a water sample having Ca++ of 220 mg/l, Mg++ of 80 mg/l and total alkalinity of 700 mg/l as CaCO3. 1b 2 3a Results of chlorine demand test on a raw water are given below: Sample No Chlorine dose (mg/l) Residual chlorine after 10 min contact (mg/l) 1 0.2 0.17 2 0.4 0.32 3 0.6 0.57 4 0.8 0.42 5 1.0 0.2 6 1.2 0.4 7 1.4 0.6 8 1.6 0.8 Sketch a break point chlorination curve. What is the break point dose? A coagulation treatment plant with a flow of 0.5 m3/s is dosing alum at 23 mg/l. Concentration of suspended solid is 37 mg/l. The effluent suspended solid concentration is 12 mg/l. The sludge content is 1 % and specific gravity of sludge is 3 %. What volume of sludge must be disposed of each day? Draw and explain the under drainage component of rapid sand filter. 3b Classify atmosphere based on chemical composition and temperature. 4a Explain the various types of screens used in water treatment plant. 4b Design a plain sedimentation rectangular tank for a town with a population of 50,000; per capita water demand of 140 lit/d, horizontal flow velocity of 0.30m/min; detention period of 3 h. 2.5x2=5 5 2.5x2=5 2.5x2=5 *********** GROUP – B 5a 5b 6a 6b 7a 7b Describe the various steps involved in Job Hazard Analysis with an example. 2.5x2=5 Explain various types of hazards. All accidents are incident, but the reverse is not true------justify. Explain with an example. 2.5x2=5 Discuss on the need of safety engineering for sustainable development. Explain how risk of accident can be minimized using Domino theory? What are the corrective action sequences of Henrich’s Domino theory and how they help to reduce accidents/injury. ********** 2.5x2=5

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NATIONAL INSTITUTE OF TECHNOLOGY, ROURKELA Mid Autumn Semester Examination-2015 B.Tech 2nd Semester Environment and Safety Engineering (ESE) Subject code- CE-130 Full Marks – 30 Time allotted- 2 hours Answer Any THREE Questions from Group A. Answer ALL Questions from Group B. Assume any relevant data, if required. Answers for Group – A and Group – B should be written on separate pages. Assume any relevant data, if required. Figures at the right hand margin indicate marks. Q. N. GROUP - A Marks Calculate the carbonate and non-carbonate hardness of a water sample having Ca++ of 1a 220 mg/l, Mg++ of 80 mg/l and total alkalinity of 700 mg/l as CaCO3. 1b 2 3a Results of chlorine demand test on a raw water are given below: Sample No Chlorine dose (mg/l) Residual chlorine after 10 min contact (mg/l) 1 0.2 0.17 2 0.4 0.32 3 0.6 0.57 4 0.8 0.42 5 1.0 0.2 6 1.2 0.4 7 1.4 0.6 8 1.6 0.8 Sketch a break point chlorination curve. What is the break point dose? A coagulation treatment plant with a flow of 0.5 m3/s is dosing alum at 23 mg/l. Concentration of suspended solid is 37 mg/l. The effluent suspended solid concentration is 12 mg/l. The sludge content is 1 % and specific gravity of sludge is 3 %. What volume of sludge must be disposed of each day? Draw and explain the under drainage component of rapid sand filter. 3b Classify atmosphere based on chemical composition and temperature. 4a Explain the various types of screens used in water treatment plant. 4b Design a plain sedimentation rectangular tank for a town with a population of 50,000; per capita water demand of 140 lit/d, horizontal flow velocity of 0.30m/min; detention period of 3 h. 2.5x2=5 5 2.5x2=5 2.5x2=5 *********** GROUP – B 5a 5b 6a 6b 7a 7b Describe the various steps involved in Job Hazard Analysis with an example. 2.5x2=5 Explain various types of hazards. All accidents are incident, but the reverse is not true------justify. Explain with an example. 2.5x2=5 Discuss on the need of safety engineering for sustainable development. Explain how risk of accident can be minimized using Domino theory? What are the corrective action sequences of Henrich’s Domino theory and how they help to reduce accidents/injury. ********** 2.5x2=5

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