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Eighth Semester B.E. Degree Examination, June/July 2Ol4

Power Plant Engineering:l! - :::,,,

'''',,,''' Time: 3 hrs' /,--,.---- Dtr/D L-tt ---^-t:^--- ^^r^^t:-

Max' Marks:l@'''-

Ir, ,*,r1 Note: Answer FIVE full questions, selecting ,,

''ti'lli ". ,,t";i, at least TWO questions from each part

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t f a.'ll.ih"* a general layout of a steam power plant, showing the different circuits,'iand System and(d-

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ll9Marks)E b. Explain with a neat sketch of chain grate stoker (06 Marks)j c. Writetherperitsanddemeritsofpulverizedcoal. =',,,4,"' (04Marks)I'fr-g 2 a. What are thbn?quirements of good coal handling plant? ..,=i,

,*, (04 Marks)

$I b. Explain with h'da*"sketch: i) Benson boiler, ii) Loeffler boikrulls-l (12 Marks)

S E c. What are characteristics of a good ash handling plant? :::..,., r (04 Marks)

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f F 6 a. Give the classification of nuclear reactors. (06 Marks)

;.E b. Sketctr"ah&explain gas cooled reactor and also list its advantages j - ", (10 Marks)g E c. whafifr{G safety measures for nuclear power plants? ' ,

"""" ,. (04 Marks)

f E ]$ffib"r"fiv measires for nuclear power plants? - " , ,, (04 Marks)

F g 7 a. -uffe: i) Demand factor, ii) Load factor, iii) Diversity #ct#.*E iv) Utilization factor v) Capacity factor vi) Use factor (12 Marks)

;' g' b A base load power station and standby power station share a common load as foilom*;s:

EE Base load station annual output: I80 x 106 KWh; Base load station capacity :42l4wE 1 Maximum demand on base load station = 36 MW; Standby station capacity : 221 (Wp,,.,

5 € Standby station annual output : l7 x 106 KWh; Maximum demand (peak load) on rt*my,e'$ N station: 18 MW.

t Determine the following for both power stations:

7 i) Load factor ii) Capacity (or plant) factor. (08 Marks)tl[ 8 a. Explain the performance and operating characteristics of power plant. (08 Marks),E b. Give the requirements of Tariff. (04 Marks)

c. What are different types of tariffs? Explain any two of them. (08 Marks)

10ME833USN

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i I a. Explain the forced, indt+oe{, balanced draught chim . (06 Marks)T"? 3 a. Explain the forced, iii-* li 3 a. Explain the forced, ind+qp4, balanced draught chimnry',p. (06 Marks)

E i b. Explain with sketch: i) Airihpheater, ii) Superheatei.' (08 Marks)E $ ^ a'^i^,,r^+^ +L^

-^^^ ^f {r,,^ xi,x;- o^,.,.:-^ +t^*^,,*L,::,+L^ ^L:*-^,,..,L^- +L^ ,{*,,^L1 --^,{,,^^,{ ;.E i b. Explain with sketch: i) Air preheater, ii) Superheatei.' (08 Marks=e{H ; c. Calculate the mass of flue gr;Emflowing throgglift chimney when the draught produced i; : equal to 1.9 cm of water. Tery'trature of."{r*d;gases is 290"C and ambient temperature iH ; c. Calculate the mass of flue giEmflowing thrcggli# chimney when the draught produced is

; fi equal to 1.9 cm of water. Tery'trature of.flr*d;gases is 290"C and ambient temperature is

E E 20"C. The flue gases formed per fu pi Uurnt are 23 kg. Neglect the losses and take the

g A diameter of the chimney as 1.8 m. ., . (06 Marks)E E Ltl4lllgLgl U.t Llltr UrrUrLrtrJ 4D I.O lll. 4hs,f]l:rnii:: tuu LvlalllJ,.r9

E E 4 a. Explain with neat sketch the aiffi@ systemr a_nd exhaust system ofdiesel powerplant.Es'E S b. Sketch and explain the layoudhf,a diesel enginepower plant. (08 Marks)

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!i; PART-B -

6 -E 5 a. Explain the following: ' 'l; E i) Water hammer ii) Pumped storage plant iii) Surge=ffit on ground level (12 Marks)

E e b. What are the advantages and disadvantages ofhydro-electriCrpiqts? (08 Marks)=(

*****

10ME844USN

Eighth Semester B.E. Degree Examination, June / July 2014

c)

Max. Marks:100'$ ',.;,.Tirme: 3 hrs. ,,on\ii ,:' :' ..t .,....::.

E NbtulZ1steer any FIYE futl questions, selecting atleast TWO questions fro,qliqih part

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fi ' "".. PART - A i,-;! :::::

B i I a. Cornpute wet and dry liners in automotive engines. t,,,, '\ (04 Marks)

Hi b. What'afethe. functions of piston rings and explain with diagrarp t?r operation of piston

t 5 rings? (08 Marks)

i f c. Sketch any two type piston design to keep heat away from loWeffi$iu:t ofpiston. (08 Marks)bolcco.a+ /

E q 2 a. What is Octane arfri$)gtane ratings for gasoline and diesel'fu61? (04 Marks)

E ry b. Explain with sketchwil'iking of cartels carburetor. ,, ^.. (08 Marks)-gE ^ 8..=

.E u. oxplain with diagram *ti*ing of A.C mechanical ftfulpump (08 Marks)tr'tr -o'g E 3 a. Distinguish between ruprr.[ia@ and tu&qfoAtling. (04 Marks)

E i b. Whatisturbochargerlagandei<Sffipw'itcanbecontrolled? (06Marks)

! i c. Explain different methods of supefelffgiiig. (10 Marks)(!o

g E 4 a. Draw neat circuit diagram ofub*u. v ilnitiorr system and explain functions of various

; € devices in circuit. u_ (lo Marks)

€ ! b. With neat circuit diagram, "xnltin

the principid$of olectronic ignition system. (06 Marks)

E E c. What is ignition advancffif'list the factors affecffig ignition advance? (04 Marks)

eE *.''tr o. PART-B; S 5 a. Mention any fo.*{Sd[irements of clutch for transmission df#pr:que. (03 Marks)g E b. Explain with n{i,& diagram working of single plate clutch. ,:,,,,..,, (07 Marks)

H E c. Explain wittq diagram working of constant mesh gear box and medtion its advantages over

! € sliding mesh gear box. (10 Marks)9:=>':bo:^ J

fi .g 6 a. Whal ii ttre function of differential and explain its operation with neat diagr;{fir, (10 Marks)

E g b. lV.hat is camber and mention the effects of positive camber? (06 Marks)

E i c. Mention the advantages of power steering. , (04 Marhg(rJ< :r 4

-''i .'i ,,r,]fr,, a. Explain with schematic diagram the air suspension system. Mention its advanthgft,andg ,,, ,. ' disadvantages. (10 Mafrks).,

7 b. Explain with diagram, the working of hydraulic braking system. (08 Marki) -...,

"E c. What is Anti - lock Bracking systim (ABS)? (02 Marks)'4;o

i: 8 a. Briefly explain crankcase emissions controlling. (04 Marks)b. Explain with diagram the Exhaust Gas Circulation System (EGR). (08 Marks)

c. What is catalytic converter? How they are helpful in reducing exhaust gas emission?Explain the 3 - way catalytic converter system. (08 Marks)

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lOME/PM82USN

Eighth Semester B.E. Degree Examination, June/July 2014

riontrol EngineeringYlyrrrr vr tsrrvrrrssr rrr:,

".?ir-ne: 3 hrs. Max. Marlsi''to0. ;, Note: Answer FIVEfull questions, selecting

; at least TWO questionsfrom each parl

i: "' '. '.:: ..... PART _ A-+ - .,,,.,,,.,:::.,"....

E 1 a. Disti?g}+ish between open-loop and closed loop systems with examples*. '' (05 Marks)

S b. Exph}6{h.e requirements of a control system. .,,,,.. tt'n';i'"" (05 Marks)E t ..,_.4... ji_.g c. Explain S&q{ing controller. State its characteristics: ,=u,ll.'"

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Proporflidnat"ptos derivative control actionE 9 ::. - --r--"--'v':'-'---

' l-----: -'---;-- .- ------b: ii) Proportiofldl plus integral plus derivative control actiops = (10 Marks)o.=

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E S 2 a. Write the equilibrium equations for the mechanical systern'shown in Fig.Q2(a), hence obtain

.Sa{ ar , 7^

EE.EE L::H3Et * {r:.,:fFig.Q2@ (loMarks)

= a b. Obtain the transfer function sffield controlle&rDG motor. (10 Marks)E i b. Obtain the transfer function gf field controlle&rDG motor. (10 Marks)

a: ,+, "''"',;...'j+

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E E 3 a. Reduce the block diagram and obtain its transfer tunction ffi

BE

EEEF -rg ,ff I-E:Jf-a-l ,;*,d,l

F E Fig.Q3(a) (10 Marks)I E f rg.er(a)

1! b. rind -!!s? by Mason's gain formula.ao a v. t tlru

-

uv ryrai\(Ir 5 Baut tultllutil.E'a' R(s)'E c' r\\r/,

--{--=(dF E {-t}ist L;l

g P--'-\o\yzE 6Lg(!\E\(/g_q' -t

Fig.Q3(b) (10 Marks)

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lOME/PM82

4 a. Obtain an expression for time response of the first order system subjected to unit step input.(08 Marks)

b. Determine the damping ratio and natural frequency for the system whose maximum

*,{,,,, overshoot response is 0.2 and peak time is 1 sec. Find rise time and settling time. (06 Marks)

'*'t,1;' c. State whether the system is stable or unstable s6 + 2s5 + Ssa + 12s3 + 20s2 + 16s + 161* 0:r"/ql' Routh's stabilitv cri (051\{arks)i{i*.1},,.,, usrng Routh's stabilitycriterion'

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5 a. Hd;f rn polar plot of TF G(s)H(s) = ,, , .^#r . t\ .="- ,l"

(06 Marks)(l +5s)(1+10s) ' o.;r-L",.K

b. Sketch th6&qq"ist plot for a systenl whose transfer functior!*G(s)H(s)=G+4Xr*,)' lt{h;. +*} -. '

Determine thd$drpgof values of K for which the system is,4fi+ff.l,b. (14 Marks)*..i$i*u.

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LJ,,-.. !r+,,,,':,,

fl -. 1,,r1l^ r (\ dr ,".

6ForasystemG(s)H(s)H,ske1MtheBodeplot.Findcrro.andol*",GM,

_ *\-. KFor a unity feedback system, G(p#ItSTb + '. , sketch the rough nature of the root'--J------1-.,;.'s(s+4)(s+2)'r^^--^ ^L^.-,:-^ ^tt I^+^:l- ^- :L, \f { fl llA Mart.s\locus, showing all details on,& ry (20 Marks)

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\, " fl.;8 a. What is compensatio+@fow are compensators classifffi@ _ (06 Marks)

b. Write notes on: . .i*l* q af

D Lead comffiorii) Lag co-4pgiTSator ff[,t* (08 Marks)

y the differential equation *. 6*+ f f 9+ 10y = Su(t) where yc. A systed,ffgoverned by the differential eq

is-=td$ldutput and u is the input of the system. Obtain a state space rffesentation of the

-=*hfurn "",, ....,

(06 Marks)

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USN lOME/PM/TL8I

ir) System capacity a'nd iii) Capacity planning. 6 Marks)

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Eighth Semester B.E. Degree Examination, June / July 2014Operations Management

.E Time: 3 hrs. Max. Marks;1006r!

€ Note: Answer any FIVE fall questions, selecting atleast TWO questions from eack part.E

{ " ,r,.,,. PART-A

$ f a. @p(rne Operation Management. Give the classification of production systems. (06 Marks)

! b. Expiain in brief the functions of operations management. ,,, ,,, (06 Marks)

E c. nefini productivity. List the various factors affecting productivity. (08 Marks)

f 2 a. What is p"lirion Making? What are the steps involved in decision making? _ _ (06 Marks)

5 b. Briefly explain the characteristics of operations decision "lqrp frame work for dffiilil*,

B' c. What is break even inalysis? Explain. ' (06 Marks)

g

; 3 a. What is forecasting? List the steps involved in forecasting process. (05 Marks)

E b. Briefly explain the various'ffietors affecting f.orw+sting. (05 Marks)

E c. A company believes that its' ual profit depend on its expenditure for research. Thef information for the preceding 0 Ve"ur*+ given in the table below. Estimate the profit when

-! the expenditure for research is O urlt ,.A|$o compute the values for slope and intercept._ rri rr (10 Marks)(d!o

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Exoenditure for Research (X) 2 J 5 4 1l 5 6

Annual profit (Y) /or 25 34 30 40 3t tr

E 4 a. Define : i) Design capacity

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S b. What are the factst$"jfuencing plant location? (06 Marks)

E c. An automobile component manufacturer has the plan of buying a moulding machine whicho-

E c11 yanu!ryr8"17000 parts / year. The moulding m/c is a srlof product line and its

€ efficiency, iS.,85%. i) What is the required system capacity iD Assume that 100

E seconds time is required to mould each part and the plant operates for 2000 hours lyear. If theg mould machines are used for 60o/oof the time and are 9}ohefficient, what is the output of$ moulding machines / hour iii) How many moulding machines would be required.g (08 Marks)

1 !,,. :: ' PART - B...5 *. a. Briefly explain the following with the help of a flow chart : =,1".I1:i..-i::.:::::: i: ---J -'-r----- _--- - --"-e------ -- ----r _--- --- {'}.*

" ;+= i) Aggregateplanning ii) Masterscheduling. (08ffia#LlM.'*,F#. b. A firm has developed the following demand forecast in units for an item which is influence4l:*

by seasonal factors :

Month Jan Feb March Aoril Mav June Julv AueForecast Demand 210 220 410 670 450 270 200 370Cumulative Demand 270 490 960 1630 2080 23s0 2550 2920

Suppose that the firm estimates that it costs Rs 150/unit to increase the production rate,Rs 200/unit to decrease the production rate, Rs 50/unit per month to carcy the items oninventory and Rs 100 per unit if subcontracted. Compare the cost incurred if pure strategies

(12 Marks)are followed.I of2

6a.b.

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IOME/PM/TL81

What do you mean by inventory? What are the types of inventories? (04 Marks)What are the major costs associated with inventories? What are the reasons for carryinginventories? (06 MarleJ

c. A producer of photo equipment buys lenses from a supplier at 100 dollars each. Theproducer requires 125 lenses/year and the ordering cost is 18 dollars/order. Carryingcosts/unit year are estimated to be 20 dollars each. The supplier offers a 6% disbount forpurchases of 50 lenses and an 8% discount forpurchases of 100 ormore lenes at one time.

' ,,What is the most economical amount to order at a time? . ' (10 Marks)'*',, *,-. eJ "'

a. pedrb'lqaterials Requirement planning. What are the basic inputs for &fuRft (06 Marks)

b. What aqelie benefits and limitations of MRP? **.%'** (08 Marks)

c. Briefly e{p{ain"ttre following : i) MRP - II ii) ERP. .r-,f..-, (06 Marks)

"t' 'tl''a. Briefly explaii irnportance.ofpurchasing and supply claia inanagement. (06 Marks)

b. WriteanoteonM$porBuydecision. 4,,*.* (05Marks)

c. Briefly explain the fdllilwing : ,::: ,,

i) Vendor developmenti..",,i, E - procurement. "rfu

-iii) Concept of tenders. *,'p,*,

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(09 Marks)

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