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8/18/2019 IAS Mains Civil Engineering 2009
1/32
C. S
M A
IN )
EX
A M
, 2
00
9
S
l. No
.
5
C
DTN
J D
FB
CIVIL
ENGINEERING
Pap
er
II
Jnm
e
Al
low
ed:
Thre
e H
ours
Ma
ximu
m
Ma
rks
3 1
I
NST
RU
CTI
ONS
Eac
h qu
estio
n
is
prin
ted
bot
h
i
n
Hi
ndi
and
in
E
nglis
h.
Answers must
be
written
in
the
medium
sp
ecifi
ed in
the
Adm
i.41i f
~ :
3 t f ~
i i f q
;r ~
i l li
"ql"d
8/18/2019 IAS Mains Civil Engineering 2009
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ection
A
1
Answer
ar:y fiv out of the following :
5xl2=60
a)
(i)
What
ts
pointing
?
Mention
methods of
pointing.
any
four
6
(ii) Explain in detail the need and procedure
for
conducting
water absorption test for
·coarse aggregate to be
used
in cement
concrete.
6
(b)
Write short notes on any thr of the following
construction equipment
:
(i)
Clamshell
(ii)
Hoe
(iii)
Tower Crane
(iv)
Trenching machine
12
(c)
(i)
Briefly discuss
the
Fulkerson rule
of
numbering events in
a Network.
6
(ii) What is the
difference
between CPM and
PERT
in
network
analysis
? 6
(d) (i) Draw a
neat labelled sketch
with dimen
sions showing the
cross-section
o a
Broad gauge track for double line with
electric-traction.
6
(ii) What is the intended
purpose
of rail ?
C-DTN-J-DFB
List
any
ten
requirements
to
serve the
intended
purpose of a rail.
6
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
3/32
.
. ,
1
.
P,
...-,f
?:IK
'la i
t ~
14ir
@ 4
i iil
a
u
8/18/2019 IAS Mains Civil Engineering 2009
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.
{c) i ) Explain any six salient
features
of
Nagpur Road Plan. 6
(ii)
List
the
eight
factt:A s
which control
the
conventional methods o preliminary
survey. 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
inclination
of
the
orbital plane with the earth s
equatorial
plane. 7
(i)
What are
the
functions and
limitations
of
Break even analysis ? 10
(ii) Discuss
any
five basic
parts
of paint
used
in building construction. 10
b)
(i)
What
are
the
five
different
types
of
plasters and indicate
the
purpose{s) of
plastering
for
Civil Engineering struc
tures
? 10
(ii)
List
the
factors
which
affect
the
selection
and
use of crane
in construction
activity.
10
C-DTN-J-DFB
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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(i) ' i l• l : t 6i$Cfi 4'11' 1
8/18/2019 IAS Mains Civil Engineering 2009
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c) i)
The
speed of overtaking and overtaken
vehicles
are 80 km/h
and 40
km/h
respectively on a
two
way traffic road.
If
the acceleration of
overtaking
vehicle
is
I
m /s
2
L calculate safe
overtaking
sight
distance.
II. mention
the
minimum length
of
overtaking zone and
Ill. draw a
neat labelled
sketch
qf
the
overtaking zone
and show the
positions
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 designed
when two grades
k
and Jo meet
on
a
highway.
The
stopping
sight
distance and
overtaking sight distance required are
200m and
6.50
m
respectively. But
due to
site
conditions
the length o vertical
curve has to be restricted
to
a
maximum
value o 500 m if possible. Calculate the
length of
summit
curve needed to fulfil
the requirements
o
C-DTN-J-DFB
L
Stopping sight distance
.
ll. Overtaking sight distance or
at least intermediate sight distance
and discuss the results. 10
6
Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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(1l)
( i )
~
fiq; qta lqk l ~ < o < f i
8/18/2019 IAS Mains Civil Engineering 2009
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~
<
.
3. (a) A construction machine
costs
Rs. 50.000/- and
has an expected life
of 5
years
and
salvage
value
o
Rs.
7000/-. t is
expected to work
2000
hours
in
a yeat·. Find out the yearly
depreciation for
the
machine
using
sinking
fund method. Assume
that
the deposits draw
interest @
12 per
annum. 20
(b) i}
Determine the elevation of the top
o a
chimney from the observations given
below :
.
tation
Reading
ngle o
on BM
elevation
A
I
2·870
28°42'
B
3·750
18°06'
The
top
of
chimney
and
the stations
A and B arc
in the
same vertical plane.
AB is 100m.
f the
RL o
the
BM is
l
00·000,
determine
the elevation o the
top of the chimney.
5
(ii)
\Vrite the procedure of construction
of simple curve
when
both the points
o comn1encement and tangency are
inaccessible. 10
{iii) With a
neat
·labelled sketch define
C-DTN-J-DFB
I
Angle
of
deflection
II.
Point
of commencement.
Ill. Long chord
IV.
Tangent distance
5
8
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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3. (
l ' l < : l ~ f t o / 12%
aimct
{Z'l iR i
1rRT
q;'{
I
I.
R ~ Cf;T 41 01
II. CfiT
III.
8/18/2019 IAS Mains Civil Engineering 2009
10/32
c)
i)
What would be the permissible speed
on
the curve,
on
a go broad gauge
track
?
The average speed of different trains is
60
km/h
and the allowable cant defi
ciency
is half
that
of
maximum cant
deficiency. Comment on the speed limit.
4.
a)
Assume suitable data
Board if
required.
as per
Railway
10
ii) Write
step by step procedure of
measuring
mid-ordinates
or
versines
for
starting lining the
curves. 1
i) cement concrete
cc)
pavement slab o f
thickness 200 mm is constructed over a
granular sub-base having modulus of
reaction 15 kg/cm
2
.
The
maxunum
temperature difference between the top
and
bottom
of
the
slab during
summer
days and night is found to be
l8°C. The
spacing between the transverse contrac
tion
joint
is ·4·5 m and that between
longitudinal joints is 3 · m.
The
design
wheel
load
is 5100
kg,
radius o f
contact
area
is 15
em,
E-value of
cc
is 3 x l i
kg/cm
2
Poissons ratio is 0·15, and the
coefficient of thermal
expansion
of
cc
is
lOxlO-{,
per o and friction
coefficient
is
1·5. Using
the edge and corner
load
C DTN J DFB
10
Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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•
(lll
I 10
I:% ~ j )
i j
fUICfil'lll
WI 3ll"&R, N t f ~ C f i l gfdfsi;l l l 'll"liCfi
15
kg/cm
2
~ .
'R
fchq1
8/18/2019 IAS Mains Civil Engineering 2009
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C-DTN-J-DFB
stress
charts given
by
the
IRC and lhe
cha1-t for the warping stress coefficient
find the worst combination
of
stresses at
the edges.
I
J
1 I I I T I
P = 5 1 0 0 k g a = 15cm
E 3 10 kg I em IJ
0.1
S
)
I - I j I I
f\1 :
I
r K ~
3 kg/em
f
15
'-
·
r to
8
l
:
6
5
45
4(
«
E 35
u
I -.
(
~
~
•
s
........
:: .
.::_
[:'::
~
I
I
f
J
()
14
6 8
~ o
2
24
Slab
thickness hem
Edge Lo ad Stress
har t
( IRC)
12
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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C-DTN-J-DFB
8/18/2019 IAS Mains Civil Engineering 2009
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50
-
.JO
E
u
- - 35
J
if. 30
.,;.
5
s;
~ 20
J
15
10
-
0
~
I I I I I _I I I
P =
5100
kg a
-co
5 ern
w
' , ' • ; .
i''
'
r
~ 30 kg /em'
r-
r
r: ..
15
~
/:' 6
1 '1'--
....
I
b
•
14
16
18 20
22 24
Slab
thickness em
Corner
Load Stress
Cflar t ( IRC)
?
L-
·' '
0
LO
z
<
0.
8
c
"-
0.6
0
cr 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.)
8/18/2019 IAS Mains Civil Engineering 2009
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50
25
:
I
I
r
11111111
-
P ~ 5 1 0 0 k g . a ~ l : 5 c m
_
rZ'
~
3 10' kg t
1
cm:
\ ~
0/:5
[ ,
V
K ~ 3 ~ ~ g / ~ m
tg
r J;::;:;
f ~ ~
t---
r--:
4 16
18 20 :2
4
Slab
th.ickness, h em
Corner
Load
Stress hart
(IRC)
1.2
c
0
.0
z
<
0.8
~
u
"- 0.6
0
V
O
5
:;
0.2
>
v
if
00
I J
6 8
10 12
144
VALUES
OF LT 1
AND l y;/
Warping
Stress
Coefficient
C-DTN-J-DFB
15
10
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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T
rip
No
.
j
I
I
3
4
6
7
8
\ii}
T
he
con
so
lida
ted
d
ata
c
oll
ect
ed
fro
m
s
pe
ed an
d
del
ay st
udi
es
b
y
flo
atin
g ca
r
m
eth
od
on
a
str
etc
h o
urb
an
roa
d
o
len
gth
4
kr
n. ru
nn
ing
No
rth
-So
uth
are
g
tve
n
bel
ow
. D
ete
rm
ine
t
he a
ve
rag
e
va
lue
s
o
v
olu
me
, jou
rne
y
s
pe
ed
and
mn
ni
ng
sp
eed
o
tr
aff
ic
str
eam
a
lon
g
eit
her
d
ire
cti
on.
Dir
ec -
Jou
rneJ
Tot
al
No.
o
No. o
N
o.
o
tion
ri
m e
s
lopp
ed
v
ehi
cles
v
eh ic
les
v
ehi
cles
d
elay
ove
r-
over
-
f
rom
taki
ng
r ke
n
o
p p o s
t ~
dlre
ctio
n
.m
in
.it
C
min
sec
N
S
6. 30
I 40
4
6
2
70
S N
7
. 20
1
,
50
5
3
180
S
6
. 50
I
20
4
3
28
0
S
N
7
. 50
)
10
3
200
·
N
S
6.
1
0
I
20
2
40
S
N
8
. 10
2.
2
0
6
ISO
N S
6.
30
I
40
4 4
300
S
N
7.
4
0
I
5
0
I
1
60
10
C
-D
TN
-J-
DF
B
16
Co
ntd
.)
8/18/2019 IAS Mains Civil Engineering 2009
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f t
q
'
E
'\
@
Q
l
l
2
3
4
5
6
7
8
(
i
i)
d
'f
l
(
i
t
<
€
"
a
i
R
'J
l
1
1<
1
1
W
~
1
;;1'11
ai R
mf
8/18/2019 IAS Mains Civil Engineering 2009
18/32
b) i)
List the
maJor
limitations
o f
Bar Chart.
6
ii) A building
project
comprises
o f seven
activities
and
the
relevant data
is g1ven
below:
Estimated Duration
days)
Activity
ptimistic
Mo st likelv
Pessimistic
l ime
time
tin e
I
l
7
I
3
l
4
7
I- 4
6
2 5
l
I
l
3-
4
4 - 6
8
5 - 6
3
6
5
I.
Develop
the
network and
identify
the
critical path. 4
2.
Identify float
and
slack.
3.
Calculate
v n nce
for
each
activity.
4
4.
Calculate
standard
deviation
o f
the
project.
4
C DTN 1 DFB
8
Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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( 1
S
)
i )
~
-
'<
f
li
G
i'
.1
~
W
I
~
:
C
-
D
T
N
-
J-
D
F
B
3
1
1
2 1
\
M t
~
(
f.
lr
i
f
i
f
)
f
§t
it
tt
ct
i<
tl
q
~
l
l
.
i
fu
1
6
fi
i<
••
h
i i
iii
'1
e
:
tQ
' fi
i
r
i
fi
iii
Q
J:
It
t
1
2
I
I
7
1
3
I
4
7
1
4
6
2
5
I
I
I
3
5
2
14
4
6
8
5
6
3
6
1
5
1
.
Cf
I rf
::
li1
<
'I
a
'1
1
a
ft
<
fu
C
f
'
1'
1
~
c
R
4
2.
t:(
fC
f
. af
t<
c
I
2
3
.
fs
t>
"1
1C
f
><
'fl
4 C
f>
T
9
fl
(O
I m
ff
c
I
4
4
.
q
f
8/18/2019 IAS Mains Civil Engineering 2009
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(c)
{i) For
setting out a trunk sewer between
station A and B. following
data
was
made
available.
Gradient
of
sewer
l
in
250.
Depth
o
invert
at
lower
end A : .
2·650
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
level
set up
nearby
: 250·00 m.
The
length
of
tfte
staff
rod : m.
Make necessary calculations for
fixing
the sight rails
at
A and B
Also write the
procedure
for fixing the
sight rails
to
the vertical posts. 16
(ii) In
the year 1940.
a certain line
had
a
magnetic bearing
of
67°30 'E
and
then
the
magnetic declination at
that place
was
8°E. In 2007. the magnetic declina
tion was 4 W.
Find the
magnetic
bearing
o the line in 2007. 4
C-DTN-J-DFB
20
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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(
8/18/2019 IAS Mains Civil Engineering 2009
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Section B
5. Answer
any ive
out of the following
5x12=60
(a)
Outline
briefly
the
concept
o
Groundwater
Budgeting and its importance in
the
deter
mination of
the safe yield
from
the basin. 12
(b) Illustrate with
the help
of
diagrams
the
basic
three types of dam. Briefly
mention
the
general
design considerations
to
e followed
for
its
safety.
12
(c) Show with the help o a suitable diagram the
component parts o an irrigation
canal
system
and briefly
mention
their
respective
functions.
12
(d)
What
is the significance o the fol1owing
substances
when they exceed the
permissible
limit in
potable
water
? Also mention the
permissible
limit
for the
same
Fluoride,
Nitrate,
Nitrite, Chloride. Arsenic.
12
(e) How is
the
dissolved
oxygen
sag curve
interpreted to indicate the critical point or the
point
o
minimum D.O.
? 12
(f)
What
do
you mean
by
hydraulically
equivalent
section What arc the parameters
on
which
the cross-section o sewer would depend
upon? 12
C-DTN-J-DFB
22
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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• • •
~
5. Rktf'Mii' ~ 1 qj.,.
' 5xl2=60
(
q;)
•
>li
'*1
i
8/18/2019 IAS Mains Civil Engineering 2009
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6.
(a)
A
trapezoidal irrigation
canal
with side slope
of
1·5 H to I V is proposed to be
lined
with
bricks
to
reduce
seepage
losses.
It
is
required
to carry a discharge
of
20 m
3
Is of
water.
Find
the
wetted
perimeter for
minimum
amount of
lining and the required bed
slope.
The value
of
Manning s N is
given
as 0·015 and it is
stipulated that the
average
velocity cannot
exceed I m/s. 20
(b)
A crop is
irrigated
with
reclaimed
waste water
whose salinity (ECw) measured by electrical
conductivir,y
is
1·0 mmho/ em. If the crop is
irrigated to achieve a leaching fraction
of
0·20
i c
(80
8/18/2019 IAS Mains Civil Engineering 2009
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6. () 1·5 H R 1 v ~
f 5000
m g
it iii
q;ct I
~
I
fiffi :
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>
J J O I > m f ~ I 20
C-DTN-J-DFB
25
(Contd.)
8/18/2019 IAS Mains Civil Engineering 2009
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(b)
What
are
the
various
functional elements
of
a
c)
8.
(a)
solid
waste
briefly the
element.
management
system
Describe
significance
of
each
functional
20
Design a septic tank for a colony of 200
persons
with
daily
sewage flow of 135 litres
per
person
per
day.
Assume
a
detention
period
o 24 hours. Draw a
neat
sketch
of
the septic
tank so designed. 20
Drainage
basin
A
Pipeline
Determine using the rational formula
with
runoff
coefficient equal
to
0-80, the
peak storm
runoff to be
carried out
by
the underground
drainage pipeline AB
for
the drainage
basin
area of 0·2
ha
shown in the above figure.
C-DTN-J-DFB
26
{Contd.)
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( ;,;r)
m 3Pffif'SC 9 ;;ia
8/18/2019 IAS Mains Civil Engineering 2009
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Take the length o pipeline as 100m and the
level difference between A and
B
as 0·5 m.
Assume
initially
a pipe diameter
of 250
mm.
Consider Darcy-Weisbach
friction factor
f
0·015. The
rainfall
duration and
rainfall
intensity 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 intensity
mins)
mm/hr)
2·0
122
2·5
108
3·0
97
3·5
89
4·0
82
4·5
77
20
C-DTN-J-DFB
28
(Contd.)
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~ 1 ; ' J < u i ' l , ~ v 314'll\?
< ~ > T
afi•1a ~
3 1'*' f f l ~ " i i 44M ~ < r r ~ ; ; f t < r ~ I
3 qfu
fflll l
mins)
mm/hr )
2·0
122
•
2·5
108
3·0
97
3·5
I
89
•
4·0
82
4-5
77
20
C-DTN-J-DFB
29
(Conld.)
8/18/2019 IAS Mains Civil Engineering 2009
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(b) Table below
furnishes the
kind
of
crop
irrigated from the water
of a reservoir by
means of
the canal system. The
data
about
these
crops are
also
furnished· in
the table.
Kind o
Crop period
Area under
wy o
crop
n da\ s
crops
n
ha
varer
in
I
the
field n
l
ha/cumec
I
olton
240 3000
1430
I
u a n . - ~ m c
365 2000
860
'
'
I
\\ heat
I
20
4000 2150
'
'
Rice
120
2000
860
I
.
Assume
30' 'o
losses
of water in the entire
canal
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 detention
period
may be
assumed
as 6 hours and the
depth -may be
assumed
as 3·5 m. Assume
velocity
of
llow
as
I 0
em/
minute.
20
C-DTN-J-DFB
30
•
8/18/2019 IAS Mains Civil Engineering 2009
31/32
•
( 78)
8/18/2019 IAS Mains Civil Engineering 2009
32/32
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