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7th Semester Civil Engineering Question Papers June/july 2018

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7th Semester Civil Engineering Question Papers June/july 2018

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7th Semester Civil Engineering Question Papers June/july 2018

1. 1. 1 I I -Lh - a"" frrr,* CV @ffiffi,ffiffi a. Explain the different shapes of se-overs and their appliu'ations on the b. Erplain r,r'ith neat sketches oi'the following : o() o ti o. ,',/ o t)l< D7 -ttoo" coo .= c.l (s+ 'i c) .)=eA P!l a.- D7 a-3a1 5t) *L o0tr >!,6 !wJ a,a- o- 5- .); .h! .rE a<) r_ t) o.- > q- ooc c otJ 0J- 5j. dJ = a-) VL ,J- (/< -N o Z L c. USN ser"enth semester B.E. Degree Examination, April 2A78 Environmental Engineering' ll Max. Marks: 100 Time: 3 hrs. Noie: .tr. Answer ony FIW full questions' selet:{"ing " ' \$tleast TWO questions from euch parl' t, 2,. Draw nest sketches wherever necestary). PART_A.. ^. a. Explain ..Combined systenr,, and ,'s.puilt.-yrt.*" of sewerage giving their merits and b. Explain ..Dry weather Flow (p'Wp)" and explain its'variations patterns. Explain the factors on rvhich nWf dePends. (12 Marks) a. What are the factors that govern the selection of server materials? List the types of materials used for sewer construction. (08 Marks) b. Explain the concept of self cleaning velocity' ..,, r,- r^, (04 Marks) c. Design a circular sewer to serve a iesidential colonl]r^i town with the following data : Area of the colony : 40 Hectares ; Prrpuiation : 80,00 ; per capitu .onrurption : 220 Lpd ; Critic;al t'ainfall intensity : Scm/hr , Available Ground slope : I in 900' (08 Marks) field. with neat sketches. (10 Nlarks) (10 Nlarks) i) Manhole ii) Grcase & Oil traPs. a. Explain the concePt' List their limitatioirs. ot'goo & coD, giving their ability in the rvaste water management. laboratory on2o/o clilutiott of waste u'ater : of Strcam River. (04 Marks) (0.1 [{arks) (04 lvlarks) (08 Marks) b. The following obsei:r'ation were made in the D.O. of aeraterJ dilution water : 7.0mg/lit' PART - B a. Definc Self purification. Explain the factors involves in self purification b. W6at is Oxygen sag curve? Explain with neat sketches. c. Explain the various zones of purification, with neat sketch' ci, UZiite short notes on : i) Sewage sickness ii) Sewage farming. D.O. of diluted sample after 5 days :2'0 mg/c lit' D.O. of originai sample of *utt. water : 0.5mg/liter. Calculate tlie de,oxygenation rate constant .-,t i0oc on 0.23 (08 Marks) a. Explain with flow diagram. sewage treatment scheme for a large city. Indicate the different (10 Marks) (05 Marks) (05 Marks) options of secondarY treatment. b. Explain the working of a 'grit chainber', with a neat sketch' c. Diicuss with a neat sketch any one method of disposal of septic tank effluent. I of2
2. 2. !t t, 'l-, rCIcv71 Expiarn.yith a neat sketch, the working of a Trickling filter. What is the principal on which it works? I (12 Marks) Design a rectangular tanli to treat 4.2 million litres/day of a av,erage demand. Assume velocity'of llow 250 m/min. Detention period 2 hrs , total depth of tasfi.Omwith free ward of 4ocm. ---r -" (08 Marks) What is meant b5'activated sludge? Describe rvith neat sketches ilre treatment of sewage by activated sludge prc,cess. .' (tzMarks) Explain with neat sketches. the working of ',,, . , , '' i) Rotating biological corrtiaction ii) Sludge dr;,,ine beds. (08 Marks) la. b. 8a. b. ,r**r(* 2 of 2