ias mains civil engineering 2009 question paper

8/12/2019 IAS Mains Civil Engineering 2009 Question paper

1/32


2/32


3/32


4/32

.{c) i ) Explain any six salient features ofNagpur Road Plan. 6

(ii) List the eight factt:A s which control theconventional methods o preliminarysurvey. Explain any two in detail. 6

(I) (i) List the ten precautions to be taken m

2. a)

Theodolite observations. 5(ii) With a neat labelled diagram, classify the

satellites depending upon the inclinationof the orbital plane with the earth sequatorial plane. 7

(i) What are the functions and limitations ofBreak even analysis ? 10

(ii) Discuss any five basic parts of paint usedin building construction. 10

b) (i) What are the five different types ofplasters and indicate the purpose{s) ofplastering for Civil Engineering structures ? 10

(ii) List the factors which affect the selectionand use of crane in construction activity.

10

C-DTN-J-DFB (Contd.)


5/32

(i) ' i l l : t 6i$Cfi 4'11' 1


6/32

c) i) The speed of overtaking and overtakenvehicles are 80 km/h and 40 km/hrespectively on a two way traffic road.If the acceleration of overtaking vehicleis I m /s2

L calculate safe overtaking sightdistance.

II. mention the minimum length ofovertaking zone and

Ill. draw a neat labelled sketch qf theovertaking zone and show thepositions of the sign posts. Overtaking zone ahead) End o overtaking zone ahead)

Assume reaction time of driver as 2 sec.10

ii) A vertical summit curve is to be designedwhen two grades k and Jo meet on ahighway. The stopping sight distance andovertaking sight distance required are200m and 6.50 m respectively. But due tosite conditions the length o verticalcurve has to be restricted to a maximumvalue o 500 m if possible. Calculate thelength of summit curve needed to fulfilthe requirements o

C-DTN-J-DFB

L Stopping sight distance.ll. Overtaking sight distance orat least intermediate sight distanceand discuss the results. 10

6 Contd.)


7/32


8/32

~


9/32

3. (4 ~ I 10

(iii) ID'f> aimct {Z'l iR i 1rRT q;'{ II. R ~ Cf;T 41 01

II. CfiTIII.


10/32

c) i) What would be the permissible speed onthe curve, on a go broad gauge track ?The average speed of different trains is60 km/h and the allowable cant deficiency is half that of maximum cantdeficiency. Comment on the speed limit.

4. a)

Assume suitable dataBoard if required.

as per Railway10

ii) Write step by step procedure ofmeasuring mid-ordinates or versines forstarting lining the curves. 1

i) cement concrete cc) pavement slab o fthickness 200 mm is constructed over agranular sub-base having modulus ofreaction 15 kg/cm2 . The maxunumtemperature difference between the topand bottom of the slab during summerdays and night is found to be l8C. Thespacing between the transverse contraction joint is 45 m and that betweenlongitudinal joints is 3 m. The designwheel load is 5100 kg, radius o f contactarea is 15 em, E-value of cc is 3 x l ikg/cm 2 Poissons ratio is 015, and thecoefficient of thermal expansion of ccis lOxlO-{, per o and friction coefficientis 15. Using the edge and corner load

C DTN J DFB 10 Contd.)


11/32

(lllI 10

I:% ~ j ) i j = O x l ~'1'fu C afR: "l


12/32


13/32

C-DTN-J-DFB


14/32

50-

.JOEu- - 35J

if. 30.,;.5

s;~ 20J

1510-0

~ I I I I I _I I IP = 5100 kg a -co 5 ernw ' , ' ; . i''

' r ~ 30 kg /em'r- r r: .. 15~ /:' 61 '1'-- ....I b

14 16 18 20 22 24Slab thickness emCorner Load Stress Cflar t ( IRC)

?L-' '0 LOz< 0. 8c"- 0.60cr 0 4.

- 2:;; 0.> ()f_

/?0 2 4 6 8 10 I_ 14

VALUES OF LYil A" D (wl\Varping Stress Coefficient

C DTN J DFB 14

10

(Contd.)


15/32

50

25:II

r

11111111- P ~ 5 1 0 0 k g . a ~ l : 5 c m _rZ' ~ 3 10' kg t1cm: \ ~ 0/:5[ , V K ~ 3 ~ ~ g / ~ mtgr J;::;:;f ~ ~t--- r--:

4 16 18 20 :2 4Slab th.ickness, h emCorner Load Stress hart (IRC)

1.2c0 .0z< 0.8~u"- 0.60V O5:; 0.2>

vif

00 I J 6 8 10 12 144VALUES OF LT 1 AND l y;/Warping Stress Coefficient

C-DTN-J-DFB 15

10

(Contd.)


16/32

TripNo.

jII

3

4

6

7

8

\ii} The consolidated data collected fromspeed and delay studies by floating carmethod on a stretch o urban road o length 4 krn. running North-South aregtven below. Determine the averagevalues o volume, journey speed andmnning speed o traffic stream alongeitherdirection.

Direc - JourneJ Total No. o No. o No. otion rim e slopped vehicles veh icles vehicles

delay over- over- fromtaking r ken o p p o s t ~

dlrection.min .it C min sec

N S 6. 30 I 40 4 6 270S N 7. 20 1, 50 5 3 180

S 6. 50 I 20 4 3 280S N 7. 50 ) 10 3 200N S 6. 10 I 20 240S N 8. 10 2. 20 6 ISO N S 6. 30 I 40 4 4 300S N 7.40 I 50 I 160

10

C-DTN-J-DFB 16 Contd.)


17/32

f tq 'E'\@Ql

l

2

3

4

5

6

7

8

(ii) d'fl(it W aft


18/32


19/32

(1S) i ) ~ -'< fliGi'.1 ~ W I ~ :

C-DTN-J-DFB

3 1 1 2 1 \ M t ~ (f.lr i fi f ) ftitttcti


20/32

(c) {i) For setting out a trunk sewer betweenstation A and B. following data wasmade available.

Gradient of sewer l in 250.Depth o invert at lower end A : .2650 m (below peg A):Distance between Section A and B :75 m.

Staff reading on peg A : l-80 m.Staff reading on peg B : 2-30m.Height o collimation o the levelset up nearby : 25000 m.The length of tfte staff rod : m.

Make necessary calculations for fixingthe sight rails at A and BAlso write the procedure for fixing thesight rails to the vertical posts. 16

(ii) In the year 1940. a certain line had amagnetic bearing of 6730 'E and thenthe magnetic declination at that placewas 8E. In 2007. the magnetic declination was 4 W. Find the magnetic bearingo the line in 2007. 4

C-DTN-J-DFB 20 (Contd.)


21/32

(


22/32


23/32

~5. Rktf'Mii' ~ 1 qj.,. ' 5xl2=60(q;) >li '*1


24/32

6. (a) A trapezoidal irrigation canal with side slopeof 15 H to I V is proposed to be lined withbricks to reduce seepage losses. It is requiredto carry a discharge of 20 m 3Is of water. Findthe wetted perimeter for minimum amount oflining and the required bed slope. The value ofManning s N is given as 0015 and it isstipulated that the average velocity cannotexceed I m/s. 20

(b) A crop is irrigated with reclaimed waste waterwhose salinity (ECw) measured by electricalconductivir,y is 10 mmho/ em. If the crop isirrigated to achieve a leaching fraction of 020i c (80


25/32

6. () 15 H R 1 v ~ f 5000 m g it iiiq;ct I ~ Ififfi :TDS (mg/1) = EC (rnmho/crn) x 640.

20{lT) B.O.D. 'IG"Cfirf42:dl t ti'iSJlii I B.O.D. 9ktfsi;lll

~ a:i "''Cf> m f ~ I 20



26/32

(b) What are the various functional elements of a

c)

8. (a)

solid wastebriefly theelement.

management system Describesignificance of each functional

20

Design a septic tank for a colony of 200persons with daily sewage flow of 135 litresper person per day. Assume a detention periodo 24 hours. Draw a neat sketch of the septictank so designed. 20

Drainage basin

APipeline

Determine using the rational formula withrunoff coefficient equal to 0-80, the peak stormrunoff to be carried out by the undergrounddrainage pipeline AB for the drainage basinarea of 02 ha shown in the above figure.

C-DTN-J-DFB 26 {Contd.)


27/32


28/32

Take the length o pipeline as 100m and thelevel difference between A and B as 05 m.Assume initially a pipe diameter of 250 mm.Consider Darcy-Weisbach friction factorf 0015. The rainfall duration and rainfallintensity is furnished in tabular form below.Consider time of n ~ at end A as 2 min.Check whether the piifl size is adequate or not.

Duration Rainfall intensitymins) mm/hr)

20 122

25 108

30 97

35 89

40 82

45 77

20



29/32

~ 1 ; ' J < u i ' l , ~ v 314'll\? < ~ > T afi1a ~3 1'*' f f l ~ " i i 44M ~ < r r ~ ; ; f t < r ~ I

3 qfu fflll lmins) mm/hr )

20 12225 108

30 97

35 I 8940 82

4-5 77

20

C-DTN-J-DFB 29 (Conld.)


30/32

(b) Table below furnishes the kind of cropirrigated from the water of a reservoir bymeans of the canal system. The data aboutthese crops are also furnished in the table.

Kind o Crop period Area under wy ocrop n da\ s crops n ha varer in

I the field nl ha/cumecI olton 240 3000 1430I u a n . - ~ m c 365 2000 860''I \\ heatI 20 4000 2150'' Rice 120 2000 860I.Assume 30' 'o losses of water in the entirecanal system and 15 losses in the reservoir.Find the live storage of the reservoir in ha Jn.

20(c) Design a plain sedimentation tank to treat

4 million itres water per day. The detentionperiod may be assumed as 6 hours and thedepth -may be assumed as 35 m. Assumevelocity of llow as I 0 em/ minute. 20

C-DTN-J-DFB 30


31/32

( 78)


32/32

I DTN J DFB Ic4 I ~ ' " " " ~ ;; tt fl

Jfllt 3003 l ' j ; ~ I T

9 ri)q; TII *p f- 'P' K ai{4; Pt fifl' R fii41 :.ifl f/tiff;(( I P t ~ r - r:p;r K dfiCMn' a l fT;:q#[ it alfflfht>

3FT fiifi/ 1'/TE:q#[ i f fr'nit Tf1; Tr:K R

ias mains civil engineering 2009 question paper

Documents