ias mains civil engineering 2011
DESCRIPTION
paper solved forIESTRANSCRIPT
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C. S. (Main) Exam : 2011
l 0 ic-OTN-L-DFAI ··1 CIVIl E~;!~~ERING
~-~ Time Allowed : Three Hours I rl M-a-x-im_u_m_M_a-rk_s_: -3-0-,0 I ~-~---------------~-----------'J ·~ :~ ; t-
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INSTRUCTIONS Each question is printed both in Hindi and in English, Answers must be written in the medium specified in the Admission Certificate issued to you, which must be stated clearly on the cover of the answer-book in the. space provided for the purpose. No marks will be given for the answers written in a medium other than that specified in the Admission Certificate. Candidates should attempt Questions no. 1 and 5 which are compulsory, and any three of the remaining questions selecting at least one question from each Section.
The number of marks carried by each question is indicated at. the end of the question. Notations/terms used have· their usual meanings, unless otherwise indicated. If any data is considered insufficient, assume suitable value and indicate the same clearly. Newton may be converted to kg using the equality 1 kilonewton (1 kN) = 100 kg, if found necessary.
! tzTFT ~ : 31'J~n· asr tt.:tt fiQFm ~ w.:r-ra ~ fiim'l ~ fR r;'' 00 "!'l
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-SECTION A
1. (a) A body of mass 1000 kg is acted upon by a force of 80 Newtons which increases uniformly until it becomes 100 Newtons in 4 minutes. If motion starts from ·rest in th;e direction of force, find the ;:: velocity of the body .at the end of 3 minutes from the start and the distance traversed.
(b) A steel rod of length 300 mm and diameter 30 mm, is subjected to a pull 'P' while the temperature is 100°C. If the total extension ofthe rod is 0·40 mm, calculate the magnitude of 'P'. Take 'a' for steel = 12 x 10-6 per oc and E = 0·215 x 1012 N/m2.
(c) If the velocity components of two-dimensional flow are
i U = - + 2x - x2y and X 3
x3 U =xy2 -2y--Y 3
Obtain:"
(i) Stream function - \jl.
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(ii) Discharge passing between two points (2, 3) and (3, 4).
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C-DTN-L-DFA 2 [Contd.~~ 1i \. J
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I
· . 1. em 1lfli 10oo kg s;&J 4 H it m iR 1lfli so ... ,!':'"~ '!iT
f
t .,
<fc.'f <:Picll t ;m l!;<t>fl4H ~ it <!<f CR 4 f'l'12 if 100 <=<rc., m- ~ t ,_* <f<.'f <lit R:m it R~\14 ~ it m ~ 31ltl:i q;mr t, {j<[ m '!iT 31Ttl'f it 3 fi'l '1 C: it .a:fu i( Wf <!<lT m.rr <fl!ff Cffl F<h<i~1 ~ m ~ ?
(<f) 1lfli ~fX!I<i 'lit ~ iF:, f-ijflq)j ~ 300 mm (fl<l 01:!ffi 30 mm t q;$Jr 'P' WT '® t "l"l f<h 'fl!1r 100°C t I <lfu: ~ Cli\ ¥f ~ai~f.S: 0·40 mm t, {l<f 'P' <!iT qf<41"1 ~ <ilf'i!Q I ~*'lid it ~ l1R Q1lMC!; 'a' = 12 x 10~ ~ oc (fl<l E = 0·215 x 1012 N/m2.
3 u = xr -2y - 35._ y 3
~ 'hlf"'Q; : ( i) !WT 'llC'H - \jl.
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(ii) <!J ~aTI (2, 3) <fl!fT (3, 4) it ~. <m'lT
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Rtfl{O! I 12
C-DTN-L-DFA 3 [Contd.]
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(d) An open cylinder of 40 em diameter and 90 em height is with water level upto 40 em. If the cylinder is rotated at. 160 r.p.m. about its axis, calculate the pressure head (i) at the bottom of the cylinder at edge lind (ii) at the centre. of the cylinder at bottom.
(e) A vertical rectangular gate is 3·0 m high and . ' 2·0 m wide. It is hinged· at the top. If the water is
standing up to a depth of 1·5 m above the top edge of gate on one side, determine the force required at the lower edge of the gate so that gate remains closed.
3·0m P __ _
--.""'- F (Force)
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C-DTN-L-DFA 4 [Contd;]
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~ . ~ • • • ~ !
\ (<::) ~ wrr· ~. NH"lctl "OO!lRf· 40 em (i2!T ~
90 em~' # 40 em 'acli. ~ ·«1< ~ I
L ~ ~ '1>1 ·~ 31l\1" ft· WW 160 r.p.m. t[{ ":!'1141 1p:rr ~' 0<! CJ<if m 'liT >iOHf ij))f.jjQ; (i) ~
~
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:
-"'~
<1ffi lt fW t[{ 02IT (ii) ~ <l'ffi lt ~ t[{ I 12
('1) ~· &ll'liilctl\ ¢>1i'lf~ ct%'0 3·0 'm ~ 02IT 2·0 m ~ ~ I '1:fQ m. 1R ct~l¥i ~ I ~ ct412 lt ~Mit HmOCfi ~ ~ ~ #~ 'liiJ ~' 0<! ct412 lt f"lil~ fW t[{ WIIQ ~ em'\ &li<'H'"l"'l <rZ'f <it ~ Clllf"'Q f.jj'8~ ifi412 'i'i'<:: 31'CWlT # 'RT W I 12
1·5 m
3·0 in l' __ -f ... ~ ...
r C-DTN-L-DFA 5 [Cont.d.]
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2. (a) A railway truck is loaded so that the pressure on
each wheel is 5500 kg weight and the centre of
gravity of .the loaded truck is 1·5 metres above
the rails. The centre-to-centre distance of the
wheels on an axle is 1·75 metres.
Find the pressure on the inner and outer· rails
when the truck is going round a curve .of
440 metres radius at 48 kmlhour. g = 9·8 m/s2.
(b) A Kaplan turbine is working under a head of
75·0 m with a speed of 160 r.p.m. The rate of flow
for the turbine is 200·0 m3/s. The diameter of the
runner is 6·0 m and diameter of hub is 3·0 m. The
turbine is developing 90000 k W power.
Determine:
(i) Flow ratio
(ii) Speed ratio
(iii) Specific speed
(iv) Overall efficiency
(c) A trapezoidal channel has a side slope of 1 : 1.
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It carries flow of 12·0 m3/s at a velocity of 2·0 m/s. -
It is to be designed as most economical
cross-section. Calculate the area of concrete lining
for 100·0 km long channel. 15
C-DTN-L-DFA 6 [Contd.]
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2. (a:r) ~ mit ~ ~ ~ ~. 'l1l1tf M 1J7.!T ~ fc!i ~. >l~Cfi ~ 'R ~ 5500 kg 'I1R ~ <MT
'l1l1tf ~ "Cfj[ :!li i<l · ~ m tr2ft it 1-5 ~ ~ ~ I ~ ~ 'R ~ ill ~-it-~ 'hl ~ 1·75 ~ ~ I -
~ ~' ~ ~ ~ 'R .e:f'ii~MoAI Gi""ll 440 ~ ~' 48 kmlhour it ;;rr WI m cr<r ~ <MT ~ <m'ft m qc:f<<il ,'R ~ crrB c;w ~ ~ i.i>JM(( 1
g = 9·8 rn/s2. .
('if) ~ <t<~"H 2:{<11~"1 75·0 m ~ it 160 r.p.m. 'R ~ Wt ~ I 2{<11~"1 ill f"ffil: W"ITQ G\ 200·0 m 3/s ~ \"1<: "CfiT CIO!ffi 6 · 0 m <MT Q'if "CfiT CIO!ffi 3 · 0 m ~ C:\~l~'i 90000 kW m fc1Cfif@ Cfi\ Wt ~ I
~. Cfllf"'t( :
(i) W"ITQ <li ::!q I <"1
(ii) '"CIR'f <li ::!q I <"1
(iii) fcjf~l !'! '"CIR'[
(iv) flqf11 <;a,'f<"1T
<~) ~ wki<i"l Cllfi!Cfil 'hl m 51Cl"l<"11 1 , 1 ~ 1 ~ 2·0 rn!s ill ~ it 12·0 m 3/s "CfiT W"ITQ m WI ~ I
~ 31M Cfj(j 'l fil <"1 &l4l ~-Cfi1Z ill fffil: ~ Cfi\'iT ~ I 100·0 km ~ Cllfl?Cfil ill f"ffil:
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cil~t>l C: <li I 'RHo I "CfiT !\1 ~ 'h 61 ~ i.f> l M \( I 15
C-DTN-L-DFA 7 [Contd.]
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3. (a) Draw the· .~.iaximum Shear Force and Bending Moment diagrams for a girder of span 25·0 metres traversed. by a load of 2·0 kN extended over a length of 6·0 nietres.. 15
• (b) A cast iron column of circular section of 20·0 em
exiemal diameter and 2·0 em thickness and of height 4·0 metres is required to carry 15·0 kN at an eccentricity of2·5 em. If both ends are fixed, find the extreme stresses in the column section. 15
(c) A 2·0 m wide and 6·0 m long plate moves at a velocity of 1·75 m/s parallel to its length, through a stationary air of density 1·22 kg/m3 and viscosity of 1·8 x 10-5 Ns/m2•
Determine the drag force on one side of a plate assuming
(i) Laminar flow boundary layer.
(ii) Turbulent flow boundary layer.
(d) Draw following water surface profiles of gradually varied flow, stating conditions justifying the ·types
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of profiles : 15
(i) M2 type profile
(ii) sl type profile .
(iii) c3 type profile
(iv) A sluice gate in a channel with mild slope to supply water in a channel from res~rvoir
C-DTN-L-DFA 8 [Contd:)
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3. (31") ~ 25·0 ~ Cfit f<l«Jf8 em'~' 'Tfi\ 1:!\, ~ 2.·0 kN C!iT 'lffi:· ;;ft 6·0 ~ <"11<11{ (lCf; f<lWIR<i ~. 11Fi1GH fcl;m .lJ<IT ~ I 'Tfi\ it ~ ~ 3Jql.i'qDI OW[
WIT <icfn ~ .a:rffig {<llfi1!!> I. 15
(<r) ~ <t w·il ~ C!iT ~ qfl:#§<; em'~' ~ 'R, f"'{"l<'!>l <11W '01:Jm 20·0 em a:fh: ~ 2·0 em WIT ·~ 4·0 ~ t 15·0 kN C!iT 'l1R 2·5 em Cfit a<'hs:;<11 it <"i'll'll .~ 3li'H'l<'l> ~ 1 * ~ ~ M % ~. '<1<T ~ qfl:m<; i'f '1\l1 :~~foiiiZ11 <it 'W<i' ~~1!>1 15
('B) m ~if, ~'8<'!>1 EFJ(i'j 1·22 kg/m3 ~ ('[~ ~'lH<il 1·8 X w-5 Nslm2 ~. ~ 2·0 m ~·WIT 6·0 m ~ W a:r:RT ~ it 'lllli<i't 1·75 rnls it ~ it ~ WT ~I ..m- it ~ m if q;$r owr 'W<1' "'1~ !!>. ~ 1iRit Sll>' f<l;
(il fi1 {I 'l W'ITQ tWrr 'Rd ~ I
(ii) ~ W'ITQ tWrr 'Rd ~ I 15
(<::) illG~I: qf{q<ff W'ITQ it ~· f-iYf~f<9<1 'Jf<"'' mlQ
li'llfll~<"' Wi11!> ('[~ .~ 1fC!il\. it li'llfll~<"' it ~ 3Jqf"!Taif <it <r<iffi Sll> ~ ai1fi1<"1 <it 'f'm ~f"'l!> : 15
(i) M 2 ~ li'llfll~ <"'
(ii) 81 ~ li'llfll~<"'
Ciiil c3 ~ li'llfll~<"'
(iv) ~ <11fil<'l>l i'f lk; SlqDI<il ~ «'l~'ll Ttz ';Jfi <1 I fil<'l>l Cfit ~ · ¥ it 'Jf<"'' 'lll\'11 { CWIT ~
C-DTN-L-DFA 9 [Contd.]
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4. (a) A steel beam·is of cross-section oCright triangle of
dimension 40 mm wide and 60 mm depth having •
yield point stress Y = 280 N/mrri2. Evaluate the
Fully Plastic Moment for the condition that the
neutral axis passes through point 'B' as shown in
the figure below and divides the right triangle into
two equal triangular parts. Assume that the plane
of the load passes through the centroids of two
triangles thus created.
60mm
c y
Plane of the Loads
30
C-DTN-L-DFA 10 [Contd .]
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4. (~) ~ i?fllkl '!iB 'lit ~-C!ilZ <'l<f ~ ~ '
f"1lii<hl fiF\1~ 40 mm - om 60 mm ~'1""'\':{cr.ll{ 'lit
~ om i?lii"'ll l:f{N1'f ~ 5/fdcift'l Y = 280 N/mm2
~ I zt1 ~ ~ ~ ~MI ~ 4{15/<"11~
~ ~ <hlf"1!!: "fcif" 3c!J~l"'l 3W ;:jM- m it
fc;l!.llll: ~ ~ 'B' it ~ ~ om <'l<f ~ <it
~ <Hicif{ ~ C!ffi 'l1flTi it ~ Cfi't I <iQ l1R '•
(1Jf"1!!: fi1i :m: q;r lii 11 n t1 ~ m mco ey;rr ~
~ <l;s;:q;j it ~ :lfl<nl ~ I 30
~ 40mm --------i n
60mm
n
c y
C-DTN-L-DFA 1 1 lContd.]
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(b) If the velocity of the flow through orifice is dependent on diameter of orifice (D), head (H), and acceleration due to gravity (g), by using Buckingham's method, frame the equation of velo~ity through orifice.
(c) Water is flowing through two pipes one of 10 mm diameter and second of 5 mm diameter and both are dischargingin 12 mm diameter pipe. The rate of .flow in 10 .mm diameter is .1·0 c.c./s. If the Reynolds number for 12 mm diameter·pipe flow is 4000, determine the rate of flow in 5 mm diameter pipe. Consider kinematic viscosity equal
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to 6·5 x 10-7 m2/s. 15
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C~DTN-L-DFA 12 [Contd .]
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(<!) "11f<:: 31TftfihB it ~ ~ CfiT ifrr, 3ilf<f<llB i:\;
O<!ffi (D), mq (H)~ :f't<flll i<j{UI (g) 1:[\ f.!$:
'!i\<lT it. (!<[ 'll4i""""' <it f<lfir. it m crut ~ 31 IRflhB it ~ ~ Clffi itT i:l; ful;· w:fl Cfl{" 1
il'"ll~l!> I
em G't '"lft1Cfllait if·~ Qqlfi?ct it wr ~. ~ CfiT amr
10 mm ~ .(l2IT ~ CfiT amr 5 mm ~ ~ G);IT \it ~ 12 mmO<!rn <m'ft '"lft1Cfll if f.H"fi{UI ~ ~ I
10 mm O<!ffi <m'ft '"lft1Cfll if ~ 1·0 c.c./s ~ I
<m:: 12 mm amr 'fit '"l ft1 Cfll if ~ i:l; fu1; "<'"II~ *I
fi&ll 4000 ~. (!<[ 5 mm amr 'fit '"lft1Cfll if ~ G{ ~ <ilf"'l( I l1R JiM(( 1lJ>OS:'IHCfi ~liHctl
6·5 x w-7 m% ~ I
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. C-DTN-L-DFA 13 [Contd.]
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SECTION,B
5. (a) A pretensioned beam 250 mm wide and 300 mm deep. is prestressed by 12 wires each of 7 mm diameter initially stressed to 1200 N/mm2 with their centroids located at 100 mm from soffit. Estimate final percentage loss of stress due to elastic deformation, creep, shrinkage and relaxation using IS 1343 - 1980 Code and the following data ;
Relaxation of steel stress = 90 N/mm2
E8
= 210 kN/mm2, Ec = 35 kN/mm2
Creep coefficient q, = 1·6
Residual shrinkage strain = 3 X w- 4
(b) Design the battens for top chord member of a steel bridge truss. It is 6 m long and subjected to an axial load of 600 kN. Slenderness ratio is limited to. 70 - 90. Allowable compressive stress = ·100 N/mm2. The member consists of 2 ISMC 175 with a steel plate of 240 x 8 mm at top.
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C-DTN-L-DFA 14 [Contd .]
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5. (31) ~ 'icl<1'i'1 'lit lJ{ ~' ~ 250. mm ~ ~ -300 mm ~ t, <it 12 <lRf -B f·"H<'hl !>i<il<t> "<'hT
Olfffi 7 mm t, 1200 N/mm2 ~ !>lfil"'~l rnT ~
!>lfil"'\'H f<h<rr lJ'lT t I B <lRf ~ ~ ~ -B 100 mm 'R ·~ ~ I IS 1343 - 1980 <its ~ f.1fcf1 .,. 8 <i1 {9<1 3il<'h91 :
~f41<1 !>lfil"'<"1 'lit fcr.mfu = 90 N/mm2
E8 = 210 kN/mm2, Ec = 35 kN/mm2
1fc:: fq~qol 2"1i<'h ~ = 1-6
ili<lfm! B:lJ''-H ~ = 3 x w- 4
"<'hi m ~ ~' !>l('lll~ fq~qOI, 1fc:: f<j~qol,
B:lji:H ~ fcr.mfu ~ i'f)\{0 I affir:T !>IR1 ~1<1 !>lfi1"1<"1
QTf.r "<'hT 31 I <'h <"1"' ij)1 f"''ll: I 12
(<f) ~ ~f41<1 ~" ~ ~ ~ 3ii'P:ICl ~ fWl: "''ffi '
(Battens) "<'hT ~ 'li1Mll: I 'lQ 6 m '\'i<rr t ~ ~ .'R 600 kN "<'hT ·~ 'l1R <"1 11141 lJ'lT t I
~ (1iM) 3ij41<1 70-90 (f<'h +flf'l<1 t I ~
B4k1 !>lfi1"1<"1 = 100 N/mm2 t I 'lQ 31Cl4Cl · it ISMC 175 -B 'RT t f"''Bil> m 'R 240. X 8 mm 'lit
~f41<1 W wiT t I 12
C-DTN-l-DFA 1 5 [Contd .]
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Y 240 X 8
x-- --.x ISMC 175
Properties ofiSMC :
A= 24·38 cm2 Ixx = 1223·3 cm4
w = 19'1 kg/m I = 121·0 cm4 yy
tr= 10·2 mm
t = 5·7 mm w
r =7'08cm XX
r = 2·23 em yy
C-DTN-L-DFA
c = 2·20cm yy
Allowable Stress in 1/r Axial Compression
. N/mm2 .
70 107·5
80 100·7
90. 92·8
100 84·0
110
120
130
140
75·3
67·1
59·7
53·1
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[Contd .)
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Y 240 x8
-x-- --X ISMC 175
' I '
----~:---;-9-0-~1~ <ffiT
y
ISMC %~: A= 24·38 em2
w = 19·1 kg/m
tr= 10·2 mm
t =5·7 mm w
C·DTN-L-DFA
l/r
70
80
90 100
110
120
130
140
Ixx =.1223·3 em4
I = 121·0 em4 yy
r =7·08cm XX .
r = 2·23 em yy
e = 2·20 em yy
~ Iii <fl:s"l it ~ Qfui!l<"! Nlmm2
17
107·5
100·7
92·8
84·0
75·3
67·1
59·7
53·1
[Coritd.]
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(c) Design a short concrete column to carry an axial
factored load of 1600 kN. Use M 20 concrete and
Fe 415 steel. Unsupported length of column is
3m.
(d) A partially saturated sample from a borrow pit
has a natural moisture content of 15 percent and
bulk unit weight of 1·9 glee. The specific gravity of •
solids is 2·70. Determine the degree of saturation
and void ratio. What will be the unit weight of the
sample on saturation ?
(e) A masonry dam has pervious sand as foundation.
Determine the maximum upward gradient, if a
factor of safety of 4 is required against boiling. For
~the sand the porosity, 11 = 45% and specific gravity
of solids, G8 = 2·65.
6. (a) For the retaining wall shown in figure, the
retained soil is well drained sand having unit
weight of 16 kN/m3 and angle of repose 30°.
The safe bearing capacity of the soil below is
170 kN/m2. The coefficient of friction between
concrete and soil below is 0·73.
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12
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C-DTN-L-DFA 18 [Contd.]
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I I I I I
r
;r
... -f '
--
(tr) ll!l>- ~ ciil'hl2 Wi q;r ~ <fi1Mq: -;;IT 1600 kN q;r ~ i!if'l<i 'lW: ~ 'li«<T * I M 20 ciis:lik W!T Fe 415 W11 fl q;r m <fi1f"'l!> I Wi q,'j'
3R1mfuf ~ 3 m * I 12
C<::) ll!l1 '@flH -B mm:. ~(d<{'l -~ it l11<ff<'1'1l ;p:it q,'j' 11m 15 >lf<i~ld W!T 2ilc!i q:'lli'll 'lW: 1·9 glee* I im m q;['~ ~ 2-10 * 1 fi(d<{i<i q,'j' q;)g- W!T ftfu> 3i j4 I fl ~ <fi1 f'i1!!.: I fi (d<{'l "?f.r 'R ~ q;r q:ifl i"' 'lW: 'PIT Q'Mr ? 12
(<:f) ll!l1 ~ ~ q,'j' -;fiq q I{'IRl ~ q,'j' * I ;ffi:: Cfi"l''l<i ~ fcl~ OS: 3ii<Wlifl ~ ~o I'll 4 it, ~ ~ ~ li<'IOI<JI ~ <fi1f';jq: I -.mt ~ fuli.: ~mrr, 11 = 45% rr21r iffii q;r ~ ~'Htcl, G = 2·65 * I s
6. (-3l) m it ~ ~ >lf<i~l<<"ll m- it, ~ ~ ll!l1 flRl<"ll 3i 4 <'II f<: fl ~ * f"! fi <"Ill ~ 'lW: 16 kN/m 3 <'f2!T f<flJ!l11 itur 30° t I ~ q,'j' ~ q,'j' ~ 't1RUT l\'!lffiT 170 kN/m 2 t I chl'hl2 W!T -;fti( q,'j' ~ ~ <itT< ~ Tli<"ll 0·73 * I
12
C-DTN-l-DFA 19 [Contd.]
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Find the factor of safety against sliding arid overturning. Find eccentricity associated with vertical load. Check that thickness of stem is sufficient and fin.d vertical steel required in stem at its base and at 2 metres from top. Ignore passive pressure while checking stability. sketch showing the steel of stem.
.<:«
' '
.Draw neat - ,~
.
4m
0·55 .m 1·6 m
0·45 m '-
.f----1 m-----{ .!'---1·6 m --t 0·4m
30
C-DTN-L-DFA 20 [Contd.]
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"B'fuT w,rr 3'jqq<f~ ~ ""llf<r Wl$ "T"f<li· ~ <"hlr->~q: 1
"3lt:IT!OR 'lffi it ~ <>~S\<11 ~ <'hlNiq: I ;;jfq <"hlr->~q: f<n "3>~ ~ 'lit ~ q<~f~ ~ &IT "3>~ ~ ~ Wm -tf\· ~ f!<P!H it 2 "!ftc\ ~ 31i<Hl!Cil
"3>~ ~fl11<1 ~ ~ <"hlr"'q: I Rf%'"1 C!Ff tf\ ~ -;r ~ ;;j<f ""JI Pl «1 'lit ;;ffq <i\ W -~ I "3>~ ~ "#_
~fl"ll<"l ~ ~ -~ ""'T.£9 {'!SliRl~ 'HI~!( I 30
. ~
.
•
'
4_m
.
.
0·55 m 1·6 m . -
0·45 m C<-
-I'-- 1 m --.f .f-- 1·6 m ---.1{ · 0·4m
C-DTN-L-DFA 21 [Contd .]
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(b) '(i)
--
A strata of normally consolidated clay of thickness 3 m is drained on one side only. It has a hydraulic conductivity of k = 5 x 10-8 cm/s and coefficient of volume compressibility mv = 125 x 10-2 cm2/s. Determine the ultimate value of the compression of the stratum assuming a uniformly distributed load of 250 kN/m2
and also determine· the time required for 20 percent consolidation. 20 ·
(ii) How is consolidation different from compaction ? What do you understand by the terms - immediate settlement, primary consolidation and secondary consolidation ? 10
7. (a) Figure shows the cross-section of a plate girder. The shear force at this section equals 800 kN. Using 20 mm diameter bolts design (i) Flange to web connection, (ii) Flange angle to cover plate connection.
360 X 20 20 mm ~~:=;=: c:::::;::t=:;:;:=l::;:::~...-20 mm
1800
20-;;::r ~t 80
- Edge of the web
- Edge of the web
tl+-80 360 X 20
30
C-DTN-L-DFA 22 [Contd .]
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' • I
("<~) (il Bl'il~<l: <i""lf.l<l '2R1illl «R ~ 3 m -.ITit t it>C!<"'l ~ m if· 3jqqlf%<1 t 1 ~ '*'114
"11<.1'1><11 k = 5·x 10-8 crn/s 11m 3114<1"1
<"i4ls4<11 :!"liill m = 125 x 10-2 cm2/s ·t I . ~ v
. tzi!lB'iH ~ '111\ 250 kN/m2 fi Stz, «R
q;r "1\11 <"i4ls"1 llR ~ <"tilf-Jttz 11m 20 >1f<1~1<1
'(j ""1 "1 "1 if; fu"Q: 3M~ 4 ill ~ Cfit ~ ~
<"tilf-Jt tz I
(ii) <i""1"1"1, <i\1"1"1 it ~ fi:ffi t ? gtr '<fu-R, ];[1\!lf'lill :8""1"1"1 <l2IT ffi:ffi4ill fi>H"1 ~ it 31T'l"
op:rr B'i~d W ? 7o (31) ~ if ~ W l"Jil: it qft~<:: Cfit fG:'!!ll41 Tf4T t I
~ 4R<J<:: lR 314(<>401 Offi 800 kN if; iiHiiiH t I
0 20 mm 01ffi1 if; iill "i'.l CfiT m ~ Stz ~ <"tilf"' tz :
(i) ~ it ilzT fi<fl'JH,
(ii) ~ ~ it 3liC{{UI qf~illl fi<fl'Jl"1 I
360 X 20
20
10
30
r 1800
0 ...
C-DTN;L-DFA 23 [Contdol
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(b) (i)
(ii)
Explain clearly the· difference between the active earth pressure and passive earth pressure. Give two examples of each state. A retaining wall 6 m high, with a smooth vertical back is pushed against a soil mass having c~: 40 kN/m2, f: 15° and y : 19 kN/m3. What is the total Rankine pressure if the horizontal soil surface carries a uniformly distributed load of 50 kN!m2 ? What is the point of application of resultant thrust? 20;
8. (a) Design a two way slab of size 3·5 m x 4·5 m to support an imposed load of2 kN/m2 and floor finish of 1·0 kN/m2• Two adjacent edges of slab are Qiscontinuous. Assume moderate exposure condition. Use M 20 grade of concrete and Fe 415 HYSD bars. Assume depth as per L/d ratio. Adopt 10 mm dia bars. Safe. shear stress is given as 0·40 N/mm2. Draw one typical cross-section along longitudinal direction of slab and show details of steel. Use following data for calculating moment :
Short span coefficient ax
LyfLx Negative Positive . Long span coefficient ay moment at moment at
continuous edge mid-span
1·2 0·060 0·045 0·047
1·3 0·065 . 0·049 0·047 .
30
C-DTN-L-DFA [Contd .]
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:: I
I:
·: I
'. '
-- IU U
(<r) Cil fi f9t;11 "Wr ~ (l2IT f.1 f%11 "Wr ~ ~ atR 'lit -m '11l~t!> I ~ ~ it :fffil: ~ 3C::I(l\OI
~~t!>l 10
(ii) -~ >rfu~ Mffl 6 m ~--~ (l2IT -~ ~
. ¢;~ lJ'6 fil%01 ~ I ~ ~ ~ S::"'14H it fcw.& <t't('ll ~ ~ f::>mit :fffil: c':= 40 kN/m2, f = 15• ~ y = 19 kN/m3 ~ I
'lfi:: P ~ lJ'6 'R Qffifi 4H ~- 'llR
50 kN/m2 "('IT[ \tlT it, ('!<[ m ~ ~ fih<HI
~ ? qfl:o111:i1 >JUiR CfiT WlR ~ 'F!T ~ ? 20
s. (31) <l'IIUN\'1 'IW:. 2 kN/m2 (l2IT ~ qfl:"'tif<"l 1·0 kN/m2
'lit ~ <lif.t it :fffil: 3·5 m x 4·5 .m f&:41'IT 'i§(1q('; (~) CfiT 31f'IJCfl0Fi q:,'Jr"1t!> I 'J(1qc (~) it ~ Wrif ~ affiim ~ I
3Gl\ J:MTCH ~ CfiT l1H 01~t!> I M 20 'lilft it ch¢1>lc (l2IT Fe 415 HYSD ~ CfiT wWr <ilf"1t!> I
~ L/d 61jql(1 it ~ l1H 01f"1t!> I 10 mm
arm <tt ~ m <il~t!> I R'(lqe: 3jq'(<'qOI Qf(lcij('l
R<rf 1J<IT ~ 0·40 N/mm2 I 0(1q('; (~) it .<l'lj~El[ ~ CfiT ~ Q I '&' fil Cf) 6'1 jQ f\'1 CfiTC ~{fii t!> (l2IT ~ flll i1 it fclq'(DI CfiT f(;@~t!> I ~ it 3i1Cfi('l"l %g f.1 '"'i re1 r{ij (1 3=ltct>sT Cfjf m '*'l ~ t!> = 30 .
~ fcl~Rl ~oli<ll ax -zyf R1 *<!: Rl
Ly/Lx "flmf fc!;;:ffi 'R ~- fcl *<J:Rl 'R ~olict> ay 'ff01k·4q, ~ 't1"ii~4Cf) ~
1·2 0·060 0·045 0·047
1·3 0·065 0·049 0·047
C-DTN'L-DFA 25 [Contd.]
I : -._
" I 0 www.examrace.com
•
(b) (i) A group of nine piles, 12 m long and 250 mm diameter, IS to be arranged in a square pattern in clay soil with an average unconfined compressive strength of 60 kN/m2. Work out the centre-to-centre spacing of the piles ·for a group efficiency factor of 1. Neglect the bearing at the tip of the piles. (For cu = 30 kN/m2 assume adhesion factor a = 0:9)
(ii) What is a "standard penetration test"? How IS the data obtained from the standard penetration test utilized m fou~dation
20
design? 10
C-DTN-L-DFA 26
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-r
(Of) (i) ;:f)-~ it 1l:'li ·~ <it, ~ 12 m ~ "ff2IT
250 mm Cl:Jffi 'liT ~, ~ 12Gf ~ 1l:'li
C1•1f<liR :>11~f<1 if Oljq'f'lllflll1 M ·~ ~ I
12Gf 'liT :>1tnf'll1 titils'1 Bl'lvf 60 kN/m2 ~ 1
~ ~ TlCii 1 it Rom: ~ it ~ it l1Ui ~ R<lilf~ll> 1 ~it amf it 'QROT <it '1'1"'1 ~ I (cu = 30 kN/m2 it ft;m:
:311ti<lH ~OIC!i a= 0·9 ~) 20
(ii) "I'IHC!i a:i11tf~H ~" 'F!T ~ ? ;:fiq
~ ~ 111'1C!i 3:it1Cf~H ~ U ~ :>1i<li9'i 'liT %?t •w:i'l•1 &<IT ;;rrm ~ ?
C-DTN·L-DFA 27
10
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. .
~44 : rfR fllJtl lra0fm , 3oo 1
3lja~~ .!Jti/(f) .w.r ~ 3/k :#3ff c:Rf if ffClT ~ I
!J'RT ~ 3fR" :fflt 47!:44 if ffflff JtFJ- fll%e. fJtft(f)/ Jffi& :mr:ms wm-ra if ~ 1T4T ~-3/k ~ 41!:44 (fif ~ Jffil& 3fR"-!jffl(f) &; . :fi&"-IJIO fff ~ Af& ?WR. fff mx:rr JrRT wf[ie 1 wm-ra fff 3&tf0:tct 1fJU:/4' &; 31fdRw 3R! fflRft 1fJU:/4' .if ffflff lJl! 3fR" fff q;)f 3iq;" rygr filifi} I w.r ?1'<!41 1 3/k s 31HC/I<f "! 1 <mtft !J'RT if "ft !Jti/(f) l&rTS "ft (f)4-"ft-(f)4 1?<5 JfR !jfl(f)~ Rb<ti)" rfR !J'RT &; 3fR" cflfJte I uti/(f) w.r &; WI! A4C1 3kP w.r &; 3Rf if Zl! lJl! "! I ?iibct;""~=&.:>-r.ld""C1:fl-~ u'df8m :wit if ugw "!. 3RmT At&"! 1 ~ WCJ 3iTcP$ 31q4ftct m fff. ?IT JRm· 4R ?<rd ~ CR c4lfJte :HkJ'"!aiJ At& mlfJte 1 ~ 31/d!N(f) efr. ctT 1 fcbdJrw:-'"1 (1 kN) ~ 100 fcbdJl!/4 (100 kg) "ffi 3fTWX fff "'l,C'"I aiJ" Rbdlm4 if qR<:ifd'n ~ JfT fl(f)C11 ~ I
J T
j
<:~ 1
J ===========:) Note : English version of the Instructions is printed on
the front cover of this question paper. ,. I l
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C.::_~:J~~~.~~l.1=xani: ~011} Serial No. [~---;;l~. ~-. --::~=-~ .~. J ( C-DTN-L-DFB)
CIVIL ENGINEERING Paper-11.
(Time Allowed: Three Hours}. (.Maximum .Marks : 300) '
INSTRUCTIONS Each question is printed' both in Hindi and in English Answers must be written in the medium specified in the Admission Certificate issued to you, which must' be stated clearly on. the cover of the answer-book in the space provided for the purpose. No marks will be given for the answers written in a medium other than that specified in the Admission Certificate. Candidates should attempt Question Nos. 1 and 5 which are compulsory, and any three of the remaining questions selecting at least one question from each Section. The number of marks carried by each question is indicated at the end of the question. · Notations/terms used have their usual meanings, unless otherwise indicated. If any data is considered insufficient, assume suitable value and indicate the same clearly. Proyide diagrams in. the answer,book wherever necessary.
EZ1FT ~·: Jf'j,~ 'FT. f&,<f) ¥41'TI< ~ )Wf-'fiif if; fl'lgfl 'F5 'R urrr ~ 1
I c
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SECTION~A I. (a) (i) Classify the sedimentary rock on the basis
of types of deposits. Give examples. 5 (ii), Explain the soundness test on cement. 5
. .(b) (i) Draw the neat sketches of the strip footing in black cotton soil. 5
(ii) Expfain the 'Rippers'. Dra.w line diagrams.
5. (c) (i) Draw aline diagram of a trenching machine
and explain briefly. 5 (ii) Draw the plan of Double Flemish bond for
various wall thicknesses with pier of same thickness.
5 (d) Draw neat sketches of pattern of contours that show (i) Vertical cliff, (ii) Ridge line, (iii) A pond, (iv) Area having uniformsteep slope, (v) A Hillock.
Aiso explain with suitable sket.ch: how the contour map will help in canal alignment. 10 (e) Explain the requirements of rail section. What
factors are considered in determining the maximum lirriit of vertical rail wear ? What is the most common cause of failure of rail and also give its explanation.
10 -...; (f) Explain the terms traffic de.nsity, traffic flow and
mean free speed and describe their inter-relationships using appropriate sketchesidiagrams.
10
2 c (Contd.)
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<?IS-~
,1. (31) (i) f.r!WIT <?; m <?;: :mrm: <R 3FHH.;'I "fu1 'liT qJffifi{OI <f1R?J~, Ji;ll!{UI <l)R?JQ; I 5
(ii) -,:ftitc: <fi f'1 <?fold I Wll1UT 9it ~ <f1R?i~ I 5 cor) (i) rsar ifiql'ill ~ if ~ -trK 'liT 'i'N9 m
"1'11'<~ I 5 (ii) fu\' (Rippers) 9it ~ 'li1R?i~ I '<<l'l>l "t'-11R1'1
"1'11'<~ I 5 0f) Ci) m '1~~1 'liT ~~if 'fl1f;r <f1R?i~ cr"'T J<l'l>l
"{(CJIRJ'-1 "1'11'<~ I 5 (ii) ·~ ~~ql{ .nc:w,ir <fi tm; cr"'T ~111m
<f; \'f.q'f <fi ~ ~ 'ffl flH I '<!Tff 'liT '<1T'f ('1~iM~ I 5
~) f'1 "'1 ~ ~ {j <N GWtif qfc:f <Fe;,' ~c:.f * fCl -0 m "111'<~ : (i) ;,;!At!:R fffi<t>, (ii) 'Pc'l> m, (iii) 1l:'P <1~'11 (Pond), (iv) 1<:'P <ll11'1 <fur 9'l"l<1.1 'ffi'!T m, (v) 1l:'P q(ll<il I
f"l-e m· <FT \1(\111<11 'it <w .qr "1<11~~ w '!!<;,' J{ I 'i fi1 "'I 'it liRfr ~ \1 4'\ "' '1 if 'l1!T <l i' I 11 d I fi'l <1 Cl~ ~.
i, ~ 'l>~R?iQ I I 0 ('r) 't1 qf{-\)<; <Ft 311'1~'1'l>dltZ 'l1!T ~ ? ;,;!Af!:R 't1
f'1 '1>fo 1 <Ft ~ <ftm mer q;rq ~ fW:; ~ iji ""' ,. <N U!R if \@ "1Tc!T i J m _ ¥t 14 'fll.'{d 1 • • <f; ~: € 1'11•11 'til {UI 'l1!T ~· <1<1T~tt'l>l clll€'!11'1 '4T <;~R?i~l 10
(') w, 111CI1111<1 ww'l, 111<11111<1 m <r"'T 3itmr ~ 'qfff <N ~ <f1R?i~ <~"'T Rrm;"{(CJifil::ir ~ W-'J!i!dl. 'it ~ 11m wrm 'liT ;a"f!'"' <t>~f'il~·~ · ., · 10 ·
3 (Contd.) c
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2. (a) (i) Explain Resource Management. 10 (ii) With line diagram explain the operation of
a drag line. 10 {b) (i) Give the classification of Arches according
to number of centres. Explain them. with sketch only. 5
(ii) Describe in brief the advantage of hollow concrete masonry. 5
(c) (i) Explain the natural errors in the levelling. A page of level book is reproduce9 below in which some readings marj(ed of 'X' are missing. Complete the page with all arithmetic checks : ..
Station B.S. LS. F.S. RISE FALL R.L. Remarks I 3·150 X 2 1·770 X 0·700 X C.P. '
3 2·2 .X X 4 X 1·850 X
' X C.P. 5 2·440 0·010 X 6 X X 1·100 X C.P. 7 1·185 2·010 X · 222··oo C.P. 8 -2·735 X
- :rl~-\ X Staff
. held r .
. . inverted
9 X (
1·685 4·420 '
X C.P. 10 1·525 0·805 X
'
.L: 12·055 X X X .
12
4 c
(Contd.)
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2: (a:ij (i) W<Fr 'J<i<Fr <Fl" "0'f1Z if>l~(,( 1 I 0
(ii) "{@~?I <tf \'Hli<ICII ~ ~ \'11\;'1 <tf t:J.ffi><il
"0'f1Z if> I~ (,( I 1 0 (<f) (i) 5Ti'i 'liT oiJ\T<t> {O 1 ·~ <tl -t:i\""11 <f; 3TT!m 'IT
"~ ~ -A .... ' "~ if> I (,( I ·1 «?I 1 'P 1 t:lili4CII t1 \;*1 if> I "0'f1Z if> I (,( I
5
(ii) ~~~~9<1l q;it>lC: ~'11{ <f; ~-~if ri 'liT quf'j" if>l~ (,( I 5
('f) (i) MC1\'1'1 if ~ ~ <Fl- "0'f1Z oF)~(,( I *1 4 d \'1 '1 ~[f(l if> I ~ "(,('!> TO <Fr ~ Rl R1 [q t Cl fit;<rr 1l<iT i ~*lit. ~ %'i,4i<t> ~ 'X'~ fil~"'l41 1l<iT i ~c: .lflZ ~- 1 """ TO 'lit 1'f <t>l~ t!> "d"m ~'41 llfilldl4 :;;ifq *l"q,'j if>l~(,( . .
m B.S. I.S. F.S. <~ ol '1 'l(R R.L. fZ cyoft
I 3·150. X
1 :no . 2 X 0·700 X C.P.
"'.
3 2·2 X X . .
4 X 1·850 X X C.P.
5 2·440 0·010 X
6 X X 1·100 X C.P.
7 1 •185 2·010 X 222·00 C.P.
8 2·735 X X <I \'1 C: I
*14<1\'1'1
~
9 X 1·685 4·420 X C.P.
10 1·525 0·805 X
:1: 12·055 X X X
12
5 (Contd.) c
•
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•
(ii). What are conditions which necessitate taking up of a.realignment project of the highway? Discuss the general principles in the realignment of a highway and explain how the work is carried out. I 0
(iii) The following defects were recorded upon inspection of a railway track : (a) Battered ends of rail joints (b) Angular cracking of rails (c) Excessive closing and opening of spaces
at rail joints.
Give reasons for these defects and suggest any remedial measures. 8
3. (a) (i) Determine the project completion time, the critical path and the total float available for each activity using C.P.M. :
Activity Duration Preceeding (Days) Activities
A 2 None B 3 A c 4 A D 3 B E 2 B F 3 A,E G 3 c
6 0
(Contd.)
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(ii) .il:BT ~ ~ qf{ffl!1fcr:rf melT ~ ;;fr (l"'llllf <f> ~~'1"1'1 qf{~'l"''il 9i'r 311<"1Q!Ffi <RT ihft ~ ? { I "' '11' f <f> :J; '1 WD "' '1 <f> c/11 q i'fi fB <!1 j d 'fliT ~ '3'1<Fl c/11(0111 'f>1fijjc; Cf21T ~· <F)fijjc; f'j; ~ 'fiT1f <iT .nt 1:1. q ~'1 f'\;<rr iifTCfT ~ I I 0
(iii) 'tor '121 <f> ;;[fq <f> ~1m f.1 ~'1 R1Ri1a ~ '1TQO
·~it:
(3T) 'tor ~ <f> ¥. fut (<f) till 'fiT <til oft 11 at;;: '1
("1:1') 'tor ~· ~ 11ur ~ 'fiT 3Tfuq; <JG'lT m <TC'iT I
·~ ~ <f> i'fii{Ufr <iT <1@\\~ :cf21T ~
f.1 <"II { o I <f> '3 q 141. 'fiT '3 <'Oj (9 <F) fijj QO 1. 8
3. (3T) (i) GPM'f'T>flWrm~, qf{~l"''il <f> fiq~'idl 'fiT Wf!T, <tiiR1i'fi tr21 a211 ~'~i'fi 1:1TII;111 <F ~ 1:1 i'fi (1 m«r 'fillc: mer <F1 fijj c; :
1:1Tit111 31'1fu ~ (Wf) 1;1. fsl; 111 ~
A 2 m'llff B 3 A
G 4 A
D 3 B
E 2 B
F 3 A,E
G 3 G
7 (Contd.) c
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--
Activity Duration Preceeding (Days) Activities
H 5 D,E I 4 F, G J 5 F, G K 4 H,[ L 2 K, J
10 (ii) Define :
EST; LFT; Total Float; Free Float, Interfering Float. I 0
(b) What are the functions of cement ingredients ? 10
(c) (i) An area 40 km in the north-south direction and 36 km in the east-west direction, is to be photogrammetrically surveyed. For this aerial photography is to be. made with following data. : Average scale of photograph Average elevation of terrain Photograph size
. End lap
Side lap
Ground speed of Aircraft Focal length of camera lens
8 0
1 : 15000
450 m
20 em x
20 em
60%
30%
200 km/hr
30 em
(Contd.)
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(l'\#)q I ·~ ·~ (~) (l'fltiql~· -
H 5 D, E I 4 F, G 1 5 F,G K 4 H, I L 2 K, 1
10 •
EST; LFT; (l'PC1 'fffic:; ~ 'fffic:, cqfilq;l{l 'fffic: I 10
GD m c: <F· q c:: <~> 'r q;r 'fliT ·'FTif m-ar ~ ? 1 o ((l) (i) ~ ~ 'l>T, -;;IT 40 km ~-~ ~if 1J.'f
36 km ~ q~i\'"1 ~ if ~. '111R1'1fARI lim (lCf>ftUI f'l;m UfAT ~ i ~ fc'ru: 311'PI~~ chlclRJ::1o1 f'l;m "'T'D ~ f,;j (l ~ ~ f.'l ~'i R1 1«1 d -~ '1itc.1ul'li ~ ~ 1 : 15000 "J,'mlT q;r ~ ;;H <1 'i 450 m '1itc:1ulqJ 'l>T tll\\"1 20 em x 20 em 1mT ~ (End lap) 60% 'TfVif· ~- (Side lap) 30% "l 1:!)'11 'i <FT '4'1 Iii 'P 'lTI1 2 00 km/hr ~'i {I ~ ~ chl'P(l c;::tt 30 em
9 (Contd.) ,
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4. (a)
(ii)
'
(iii)
(i)
Calculate the flying height of the aircraft, number ofphotographs in each flight, number of flights, total number of photographs, spacing of flight lines, ground distance between exposures and exposure interval.
12 Explain sight distance and factors causing restrictions to sight distance. Explain the significance of stopping sight distances. Also derive an expression for finding the stopping sight distance at level. Making necessary assumptions, calculate the minimum sight distance required to avoid a collision of two cars approaching from opposite directions at 90. and 60 kmph. 12 Draw a neat sketch of diamond crossing and list its important features. 6 Differentiate between standard equipments and special equipments. 5
(ii) Explain the economic life of an equipment. 5
(iii) The proposed terms cif two loans are as ·follows :
Loan I of Rs. 2·00 lacs at 4Y, % p.a. with redemption in 50 years at 3% p.a.
10 0 (Contd.)
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'W:fll'i ~ 3~1'1 i>i11{ 9c~<t> 3~1'1 if 'lilc'i!llciil ~ ti\6!11, 3~1on· ~ <:i\6!11, ~ 'litclUI'lil. ~ ti<.O!ll, '3~ l'i Wiftr.TI if; <.{Tq 31CJ't>lQl, 31'1 ICJ {uJr if; l1UT ~ ·~ (lt1J 3111CJ{OI '9iTc'f ~ 110111 ~Alq; I
12 (ii) ~ ~ lltn ~ ~"" ~u if; fuQ; <t>I<'P'i
qiT ~ ~ A1 \!; I ~ ~ qiT ;j) if> OJ 'liT 'flTI '11; cCJ ~ ? B '"l <kl '!:\\ ~ ~ -{)q; qiT m<1 ~·if; fuq; "Q;<t> · cljGjiji cgcq•1 'P~Alq; I 3JiqQl:jif> ti<'P ("q 11 aiT qiT 'ffit ~. <IT "fi'1iT qiT ;:;IT f<l q {\ (j ~ai't ~ 90 kmph lltTI 60 kmph '!iT "ql(1 ~ 3IT m ~ 31'1>1 C:%< ~ ill<n'i <f.- ~ 311 CJ Q'"l<t> ~'fd"T ·-,m ~ m<f ~ A1 \!; I 12
(iii) :SI/Ol'"l.:S Yl<'fi 'liT f<lo@ ~ ill'"jl?iC!; lltTI ~ ~ 31fiic;r~ 9it ~ ill'i l'!i~ I 6
4~ (31J Ci) · '"ll'"1'fi >3Yf<li< llm f<l!ilq Jq'i"fi< if 'flTI m i ?
5 (ii) mfi 3q'i4i{ '!iT ~ ~ qiT ~ ~Alq; I
5 (iii) <IT ?ll1lTI ott 9@~ct vm f.1 ~1f?IRc1a ~ : ~ I ' 2·00 C'ffi.Cf '!:\\ 4Y, % gf(lqcf
(ltTI 50 'CJ1S[f if 3 % 9 R1 q "'' "" r-r;rC!/11
II (Contd.) 0
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(b)
Loan II of Rs .. 2·00 lacs at 4% p.a.
with redemption ·in 60 years at
2% p.a.
Which of the two loans is more favourable
to the borrower ? 10
Explain with reasons the defects in Plastering. . -
10
(c) (i) Explain the objectives of triangulation surveys
and explain the criteria for selection of the
layout of triangles. Also explain the term
well conditioned triangles, and strength of
figure. 10
(ii) List the fundamental lines of a theodolite
and explain briefly the desired relationships
'between these lines and the effects if such
relationships are not maintained. Also describe
the checks need to be applied on an open
traverse. 8
(iii) Discuss the importance of gross wheel load
and contact pressure in stress distribution
pattern and in pavement design. 6
(iv) Explain how the elastic modulii of sub grade
and base course are estimated using plate
bearing test data. 6
12 0
(Contd.)
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~ II : ' 2·00 m 'R 4% ~R\11of crqr 60 qqt if 2% 9RI<'Iof 1R R$·ql'1
~ ~if ~ 9i'r ·zy,"f if ~ qit.,-m ~
10 ("f) <Z11t'Zo{ if ·-zysrr· Cf>T ifii{OI fl~d 'f1!A ~fGIQI 10
('!>) (i) f-:r:J>"'Ic'lifi Wf~ "<F '3~Q<il' 9i'r '1di"'C( <f11T
f-:r:Ff <F ~ ~ f<P-1 ~ 'R v:rrq·
F."''i I .311'Wlifi ~ ? 'W "4T ~ '!>'\fGIQ fil> W w~ f-:r:Ff • ii:f -m <tt fl '1<1'<1 1 • crr 'fllT ar<f ~· ? 1 o
(ii) fiRft TZ~<nsiMI-.c: 'lit >rm'l ~ 'lit ~ '1'1J'iiC( Cf11T "fl'&M if ~ marr <F q{fq{ <'1ifu<1 B<rm 9i'r ~· 'f>'1Ri!Q ii:f ~ 1t B<ru fl·\j;~C: '11ft tm't ·~ Cfi,j 'fllT >f'Wf q$ lll ? w "4T crut'i' ~fGIQ 1Z'P wr ~IP'l if ~· 'lit 3\1'1Q£l'li<11~ 'fit~ ~· ? 8
(iii) ~ <F ~ if fl'liC1 qfil'11 ~ Cfq[
Wr'!f ,c;w crr 9RI'1<'1 <Tc'i' 'tc;f, <F '1i\t<'1 'R
6 (iv) ~c WDT '1ft~ 3\i'liif 9i'r ~m,1 ~ ~ ·~ q';)fGI C( fil> fl i!j u $ Cf11T ~ fl qi)<:f' <F ~ 2>"1i'f>l. Cf>T 311ifi<1'1 ~ 'f>'ffl ~I 6"
13 (Contd.) c
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- -:;..-:-. . --..,.. -- -- ~--------
SECTION-B 5. Answer the following :
(a) What is open channel ? List the design characteristics of open channel. I 0
(b) Differentiate between Thermophilic and Mesophilic bacteria explaining their. roles in anaerobic digestion. 10
(c) What is an aquifer ? How are they classified ? Describe salient features of aquifers. I 0
(d) 15 mL of the waste sample has been added into a 300 mL BOD incubation bottle. The initial D.O. ofthe diluted sample was 7·8 mg/L and the final D.O. after 5 days was 1·7 mg/L. The corresponding initial and final D.O. of the seeded dilution water was 8·1 and 6·9, respectively. What is the 5-day BOD of tqe waste_water sampk?
10 (e) What are spillways? Why they are needed in the
dams ? Briefly describe salient features of 'shaft' and 'chute' spillways. I 0
(f) Based on type of air poll.ution and climate, differentiate between 'Gray air' and 'Brown air' cities, with examples. I 0
6. (a) (i) Explain the types of sedimentation with examples. 2
!4 c (Contd.)
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5.
6.
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(ii) What path trajectory the settling particles follow in circular and rectangular settling tanks ? 2
(iii) Given the following data. below, design a circular sedimentation tank with launders and find out :
(i) The diameter of the settling tank.
(ii) Total depth of the settling tank with free board including the depth of the hopper portion.
Total township area 20 ha
%age areas for roads, public
utilities, and open spaces I 0%, 15%, 15%
Floor to space ratio 1·5
Floor area required for
each person
Water losses accounts for
Working hours for plant
Surface loading rate
Detention time
Slope for floor slab
10m2
4%
23 hrs.
1·25 m3/hr/m2
2·5 hrs
I in 12
Incoming velocity of flow 0·6 m/sec.
Check the design with weir loading calculations. Assume water supply rate as 135 lpcd. Give a neat sketch of final designed circular tank showing all design parameters.
16
16 c
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( ii) ~ ~ 31111 \i I ifi I( i~ lf f.1o1 <; '"1 'fi1liT <f> '1~ em 'fl:fT m ~ ? 2
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~ Qli'fl !?l?l'h\'1 20 ha
w;<N, "R ~ <f2lT ~ mf N <film: Qkl~l\i ~ 10%, 15%<f2ITI5%
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2:l hrs.
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2·5 hrs
I : 12
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17 (Contd.) c
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(b) (i) What do you understand by multipurpose reservoir ? Describe in brief various investigations required for reservoir planning.
10 . (ii) What is reservoir sedimentation ? Discuss various methods used for control of silting of reservoir. I 0
(c) (i) Explain with the help of a neat sketch the hydrological cycle indicating its various phases. 10
(ii) Discuss different forms of precipitation. How measurement of precipitation is done ? I 0
7. (a) (i) What are the factors that influence the flow of sewage in sewers ? Define 'Time of Concentration' for storm water drains and explain its significance. 5
(ii) A vitrified clay sewer is to carry a discharge of 1000 l.p.s. When flowing half full, it is laid at a gradient of 0·0032. The manning coefficient of the sewer is same as that of a triangular notch with unit depth and having a slope of I in 2. The velocity in the notch is obtained as 0·804 rn/s with a gradient of I in 400. Determine the velocity of flow and diameter of sewer. 15
18 c (Contd.)
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co.r5 Ci) <~~>a~~nlj '*"l~lll -?t m 'FIT MiRd. ~ ? '*11~1£1 41"1'"1 1 <T;. fffi; ~~ if <~~l<m'li ~-. tFt * iji {'n tit<lt ~ ? 10
(ii) · ~ f.1o1 ~ 'i 'FIT litfT i ? ~g if m<:: "I '"11'1 'liT f.1481ct ro <Ft ~ ~ <Ft clji\.Oljl
10
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19 (Contd.) c
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(b) (i) Explain the terms duty and delta. Derive a relationship between· the two. 10
(ii) A soil has field capacity of 23% and wilting coefficient of 10%. If the root zone depth is 65 em, determine the storage capacity of soil. Irrigation water is applied when moisture content falls to I 0%. If water application efficiency is 70%, determine the water depth required to be applied in the field. The dry unit weight of soil is 1·5 gm/cm3
. 10 (c) (i) What is unit hydrograph ? Explain various
propositions of the unit hydro graph. 10
(ii) Explain various steps adopted to derive a unit hydrograph from an observed flood hydro graph. I 0
8. (a) (i) Differentiate betweim Garbage and Rubbish.
6 (ii) What are the-advantages and disadvantages
of sanitary landfills ? 7 (iii) Define. Municipal solid waste. List out the
good practices that should be followed for an efficient management of MSW. 7
(b) (i) What do you understand by term river training ? What are the works that come under this category ? 10
20 c
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21 (Contd.) c
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(ii) Draw a sketch of a guide bank. Give its design features.,, 10 (c) (i) What.is radioactive pollution ? How is radio-active waste disposed ? 10 .(ii) Discuss the need .of Environmental Impact Assessment study. How do thermal power plants affect the environment ? 10
22 0 (Contd.)
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(ii) <:(<P' f.101<Ji <tv: 'fiT~ "''ll~ I ~ ~ ~~ eFT O'!Cll~ I 10
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(ii) qqlg {O~[j m f.'r!lkur 3lW!'l 9iT '1m 3li<N!i<Ji(il ~' [email protected]!JI <Af';Jo; I C!T'f Qlfffi ~ qqfq {01 'R '1m 'I'I1fCT :S I (1 d ~ ? 1 0
23 0
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Serial No. ['------~] l C-DTN-L-DFD]
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Note : English version of the Instructions is printed on the front cover of this question paper.
24 c
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