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l'inre :. :.

r!1ax tVlarks: 80lVlin., Pa.ss iVlarks: 28

Nri fe: A il .qu esrio;birte.''fi;ffiCffi Assurrrq suitable data, if.ilt;

9l (u) \\'i-iie sh,:n nore r-,r-r:

iiiiature Smoke Cha:.t; 1iii1 Srnoke-scopeoR

what are thc colnrnon absorberrts used to rcmo'e so2, H2s, FIFand No*.poilurants?

(b) so2 (Mcir. .y^t

: 64 ) js conrbjned with an air frowing in a ducr ar ac.ncentration of 100 ppm' The air at standard;"roitlo"r florv'at the rate of l0t'tt'/sec.

C,. rind C,1,,, fbr the SOz'in the mixture.in i(g/day. does ihe SO, no* rtrroujl tl.r* ar.t. 0S

T'hrde-t[ou rs, j ,!..

Q I (a) Explai'the foilowing rcrms with respect to air poilurion.

@ire ttie en cts of carboxy ri.rn"sfli;n on r,u,r* nu*o=tt

)l'vvnvwo

:(b)ExplairrhowairpolIutionaffectstlrefol1owingmaterials?.'''(i)Painrs; (ii) Rubber; (iii) paper; (iu) rexrir;;: i;;;i;;ilont" inciusrrv

Q 2 (a) 3,:::::.!" !'i:?v rhe,sources -f aii ponurion in thernrar power pranrs ancl

...su88.9stsuitab1ernethodsq1.poIlutioncontrol.(tr) Explain the theory ancl cl'feci

"iil;;;;;;'orpho,o"t,emicar smog. rl5

, ": ' ..- i:r,apoiati ve ernissions. , ' ; -1, ..: --

0s:

0s

05

(i) Conrpute C,,,' (ii) At what rare

1\ ,1r,r. + ( ir J t ,l rscuss th e+--' eq Liipmentfactors 1o bc c.rrsidcrcrj r*hiic: selecting a siritabre oontrorlor Patljculate nlailer? " -,- "'*:'"

,f) flVlajn with a near figure, thc ccirsri.uclion and. e reclroslaltc precipirator. Wheri is it pref.ened?

OR^ -Jrxplain with aleat figure, the consrruc,tin., o,,..J

lJr-rrv no- i+^ ,-{:c ^: -,, -, ve,rr rrr vrrr\.rst jcy De lln]l1.oved./

:1. .:l . , .

P.T.O.

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.,,':;-r.;,',-. ;:--..:.:,..1-'-:,;..-:..'.';;.:-.*.-. i.-. -li: i ;-.--_,_.- i:.- -i:-._ri',:i n:1.:;,1.--i.:: ':.:.-..::':l:. , .-.1-r;-1:.i ='

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:.

.;Timc: Three Hours Ma-{Nlarks:80

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_-+-+- :: . : Min. pass.N{ar"ks:l2g

,H Y-Discuss the effect of air pollution on property. , i 0. .... . : .: .:j, : , - Of,I{. tfie. concentration,.o{ a hrdrocaLbon vapour 1n iah^ eo aii-is zomg)rn., ,toexposSle is'8 hr1 respiratory.venrilati"" .it"ir,i.j';ru *o'in- ".j5;il;

',"rerenrion time is,73 o/o,'what is rhe biologicaiiy

"l;rrr-l ;;;i'- Lrrv qv\

(P ?i:tuguish between the foltowing:i(i)Primary and secon,J ary air poliJtants(ii)Stationary and mobile ro"r"* oi:aii portutarrl '",: - , , , :

whar are the factors to be considered in the design of incinerators? what are l0rhe timitations jn'iil F;l'lr "o-u"rti;;-%; the conrror of gaseouspoilutants? --- ---^-"' '":

(b) ^c:|4^(Mot-

t1:.153.8) is combined with an air flowing in a duct at a r oconce- -ntration of 150 ppm. The air at standard cJnditions flow-at therate of l0 m3lsec.(i) Compute C,''. Cu and C,',u for the CCI+ in the mixture.(ij) At what rate in Kg/day. do", rhe cci;1r;il;;;h;e duct.ExpJain with a neat-figure, the principre, constru;;;;';;"working of a r 0cyclone separator?

olExplain with a neat figure, the construction and working of settling l0clrambcr. How can its effitiency be improved?

(b) The avera-ge dust concentratibn in a.plenum of the control equipment is 34g lomglm'. The'outlet dust concentration ;" iii^'I,*]^, rrr,^_. ,_ ,,-eoiicction efficiency or the "o,,r.oi-;;i;;";i fb;"ffi o##,#c

averirpe

{a) ''' r :. ;; i;.ij;;;'; i l,;ti:, i i'"; l; i j j'r;as"i'il; gi; prren6*"no, or ;g.b.gree.nhouse threai,frqm trace gpies., : i' 'il .r:::. :jt l.;.. ',1::l: -:iil l r.:'::,:.: l: i r ": :

ffect" due

::..r:.1:ir,i::. ::r:.itl:irrlt:::ir:...:iti,.i,:i::-::.:i.r..,:t:-.,i:.:'r.;

w, .*" .6r'nvironmen! (prgtection ) Act,.l9g6? , " . ,,rr-.,t.i

)f

CSVTU Code:MEl28t5B Tech(Eight Semester) Examination, 2012 Apfill"

subject: Environmental Pollution & contror (open Elective IVjBranch: Mechanical Engineering

Time: Three Hours Max Marks: 80Min. Pass Marks: 28

Note: All questions are compulsory. Assume suitable data, if any.

Oy{niscuss the effect of air pollution on properry.

o'An important economic repercussion of air pollution is the intangible lossdue to damage to art objects throughout the world". Substantiate thestatement with examples

OrWhat are the harmful effects of polluted air on human being?

If the concentration of a hydrocarbon vapour in inhaled air is 70mglm3,exposure is I hrs, respiratory ventilation rate is 1.2 mr/ltr, and the averageretention time is 73Yo, what is the biologically absorbed dose?

,/'$Y Explain the following terms with respect to air pollution.

,(i)Point source; (ii) Area source; (iii) Line sourcea2 (y What are the effects of engine operating conditions on the composition of 8"' auto exhaust?

ORExplain the theory of formation of photochemical smog and its effect on genvironment..

,gr6"Vlain sources of air pollution and methods of abatement in thermal power Iplant.

Q3 (a) Explain how " process changes" can be adopted in a metallurgical industries 8to reduce the problem of air pollution.

Orwhen do you recommend absorption as a method for control of gaseouscontaminants? List out the absorb..ents used for rernoving SOz, HzS, andNoz.so2 (Mol. wt. = 64 ) is combined with an air flowing in a duct at aconcentration of 100 ppm. The air at standard conditions flow at the rate of10 mi/sec.(i)Compute Crn, Cn and C*u for the SOz in the mixture.

4

4

5

aJ

. (ii)At what rate in Kg/day, does the SOz flow through the duct/

gM Explain with a neat figure, the principle, construction and working of 8different types of impact separators.

Or

, Explain with a neat figure, the construction and working of plate typeprecipitator. When is it prefened?Explain the design parameters (,# for electrostatic precipitator.

s}' Wtrat is the minimum size of the particulates removed through thefollowing control equipment:

1. Settling chamber; 2. Cyclones; 3. Electrostatic Precipitator.

The average dust concentration in a plenum of the conuol equipment is 648

mglm3. The outlet dust concentration is 4.90mg/m'. What is the average

collection efficiency of the control equipment for this dust loading.

5

tJ

J

aW Describe the phenomenon of 'ogreen house effect" due to CO2. Explain the 8- greenhouse threat from trace gases.

,/&f What are the main features of Environment (Protection ) Act, 19SAt

Explain the different methods fo, A"tlnlrlning air pollution index.

I

I