CIVIL ENGINEERING
Paper-11
(Time Allowed: Three {Maximum Marks 200]
INSTRUCTIONS
Candidates should attempt Question Nos. I and 5 which are compulsory, and any THREE of the remaining questions, selecting at least ONE question from each Section. All questions carry equal marks. The number of marks carried by each part/ sub-part of a question is indicated against each. Answers must be written in ENGLISH only. If any data is considered insufficient, assume suitable value and indicate the same in your answer. Unless otherwise indicated, symbols and notations have usual meanings. Neat sketches may be drawn; wherever required.

Important Note
All parts/sub-parts o/a question must be attempted contiguously. That is, .candidates must complete attempting all parts/sub-parts of a question being answered in the answer-book before moving O(l to the next question. Pages left blank, if any, in the answer-book(s) must be clearly struck out. Answers that follow pages left blank may not be given credit.

SECTION-A
1. Explain five different types of R.C.C. flat floors
(which can support live loads). I0
Differentiate between float and slack in
Networks and discuss on discounted Present
Worth Analysis. 5
The following consecutive readings were
taken with a dumpy level and a 4.0 m levelling
staff on continuously sloping ground at a
common interval of 30 m
0.585 on 0.936, 1.953, 2.846, 3.644, 3.938,
0.962, 1.035, 1.689, 2.534, 3.844, 0.956,
1.579, 3.016 on B.

The elevation of A is 520.450 m. Make level
book and apply usual checks. Determine level
of B and the gradient of line 5
Explain CBR value for the design of flexible
pavement. Determine the CBR value of a
given soil sample, if load carried by the
sample at penetration level of 2.5 mm and
5.0 mrn are 64.6 kg and 91.20 kg respectively.
5
Soil subgrade sample collected from site was
analysed for the highway pavement design
and results obtained are given below.
Calculate Group Index Value of the sample.
Soil portion passing 0.075 mrn sieve 55
Liquid limit
Plastic limit
45%
20%
5
Calculate curve lead, radius, switch lead and lead
required to set out a 1 in 8.5 turnout, taking off
from straight B.G. track with its curve starting
from the toe of the switch, i.e. tangential to the
gauge face of the outer main rail and passes through
theoretical nose of crossing i.e. NTC.
Given heel-divergence 11.4 em. 10
0 (Contd.)
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2. What are the problems encountered for
concreting in hot weather 3
Mention the main components of Portland
cement. 2
What is unity of command in organisation
2
What is segregation and bleeding 3
Explain the term "Orientation" with reference to
buildings and two important rooms in a house.
10
Calculate warping temperature stresses at
interior, edge and comer region for rigid
pavement having panel of cement concrete
slab of size 4.50 x 3.5 m. The following
design parameters are to be considered.
· Design wheel load 8000 kg
Elastic modulus of concrete
3 x 105 kg/cm2
Poisson's ratio of concrete 0.15
(Contd.)
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Effective modulus of subgrade
reaction over the DLC base
8 kg!cm2/cm
Tyre pressure 8 kg/cm2
C/C distance between t;VO tyres
31.0 em
Thickness of concrete slab 32.0 em
(viii) Thermal coefficient of concrete
10 x 10-6 per oc
Temperature differential 15.8°C
Bradbury's coefficients C 0.57 and
X
c 0.30
y
15
Calculate the maximum permissible train load
that can be pulled by a locomotive having
four pairs of driving wheels carrying an axle
load of 24 tonnes each. The hauling capacity
of train is 1/6 times the load on driving
wheels. The train has to run at a speed of
80 kmph on a straight level B.G. track.
5
0 (Contd.)
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· 3. Discuss in detail the maintenance and repair
cost of construction equipment. 3
Mention the parameters involved in vibratory
compactors. 2
Discuss in detail the pumping of
3
Define motion study and mention its
objectives. 2
What are factors affecting economic life of
an equipment 3
Differentiate between Wheel tractor and
Crawler tractor. 2
State the National Building Code Provisions
for Bathroom W.C. Bedroom
Kitchen F.A.R. 5
A tacheometer is used to obtain the difference of
levels between two points A and B. The instrument
is set up at another point and following
(Contd.)

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;·
.observations were taken
Staff at Vertical angle Stadia reading
A 6° .30' 3.500, 2.815, 2.130
B go 1.870, 0.990, 0.110

Assume the additive constant C 0.50
and multiplying constant K I 50.0.
10
A valley curve is formed by a descending
gradient of 1 in 20 meeting an ascending gradient
of 1 in 25. Design the length of a valley curve to
fulfil both comfort condition and head light
distance requirements for a design speed of
80 kmph. Assume allowable rate of change of
centrifugal acceleration= 0.60 m/sec3 and average
reaction time 2.50 seconds. Take longitudinal
skid resistance 0.35. 10
4. The following table gives the data for the duration
and cost for each activity of a building project.
The indirect cost of the project is Rs. 1000 per
(Contd.)
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day. Determine optimum time and cost of the
project.
Activity Normal Normal Crash Crash
duration cost duration cost
(days) (days)
8 7,000 3
1-3 4 6,000 2 8,000
2-3 0 0 0 0
2-5 6 9,000 I II ,500
3-4 7 2,500 5 4,500
4-6 12 10,000 8 16,000
5-6 15 12,000 11 16,000 .
5-7 7 12,000 6 14,000
6-8 5 10,000 5 10,000
7-8 14 6,009 7 7,400
7-9 8 6,000 5 12,000
8-9 6 6,000 4 7,800
10
What are, the deficiencies of bar chart 3
Differentiate between CPM and PERT. 2
Write down five different methods of
"valuation" and explain them briefly. 5
(Contd.)
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A fixed time 2-phase isolated signal is to be
provided at a square intersection having a NorthSouth
and an East- West road where orily straightahead
traffic is permitted. The design hour flow
of traffic· from various approaches of the
intersection and corresponding saturation flo'w of
traffic are given in the following table. Assume
the loss of time per phase due to starting delay
of 3.0 seconds and All Red period per cycle is
6 seconds. Calculate optimum cycle length and
green times for minimum overall delay using
Webser's approach. Sketch the timing diagram
for each phase and phase diagram.
Approaches North East West
Design hour traffic
flow in PCU/hr 1500 1200 1100 1400
Saturation traffic
flow in PCU/hr 3700 4800 3600 4000
10
An embankment is made for road construction
on ground which is level across (in lateral
direction). The height of the embankment at the
point A of the section is 2.5 m and formation
(Contd.)
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rises uniformly on a gradient of I in 120. The
width of the embankment at formation level is
I 0.0 m and the. side slope of the bank 2 to I. The
surface of ground is in descending gradient from
point A to point B of I in 25. Find the quantity
of earth work in cubic metre required for ..
embankment, if distance from point A (starting
of section} to point B (i.e. end of section) using
prismoidal and trapezoidal formulae. I 0
SECTION-B
5. A catchment has five Raingauge stations. The
average annual rainfall values at these stations
are 75, 90, 82, 98 I 05 ems. If the Standard
Deviation of the rainfall data is 12 ems.,
determine the additional number of raingauges
needed in the catchment for error in the
estimation of the mean rainfall. 5
The discharge available from a Tube Well is
100m3/hr. Assuming 2800 Hrs of working
for the Tube Well in a year, estimate the
Culturable Area that this source can command.
The intensity of irrigation is 50% and the
average depth of water for the crops grown
is 40 ems. 5
(Contd.)
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A 30 ems well completely penetrates an
unconfined aquifer of saturated depth 40 m.
After a long period of pumping at a steady
rate of 1500 lpm, the drawdown in two
observation wells 25 m 75 m away from
pumping well were found to be 3.5 m
and 2.0 m respectively. Determine the
Transmissibility of the aquifer. 5
Assuming the relative density of sediment
particles as 2.6 and unit weight of one
cu.m. of sediment as 980 kg., estimate the
weight of I m3 of deposited sediment in the
Reservoir bed. 5
Determine the horizontal floor length below
a hydraulic structure founded on permeable
formation if the Design Head is 6 m., depth
of downstream cutoff pile is 6 m. and the
value of safe exit gradient for the formation
is 1/6. 5
Write a brief note on 'Tropospheric ozone and
Stratospheric ozone'. 5
(Contd.)
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Enumerate modifications of activated
sludge process and describe 'Biosorption
process'. 5
Why is recarbonation carried out, while
softening water by lime soda process 5
.
6. A flood of certain magnitude has a return period
of 50 years.
Determine
the probability of exceedence
the probability of the flood magnitude equal
to or greater than the given magnitude
occurnng
at least once in 20 successive years
two times in 20 successive years
once in 20 successive years. 10
Compute the discharge over an Ogee spillway
with a Coefficient of Discharge 2.2
at a design head of I 0 m. The effective length
of spillway is I 00 m. Neglect the velocity of
approach. 5
Discuss the "Effect of Tension Cracks" on
the stability of a Gravity Dam, with the help
of a neat sketch. 5
(Contd.)
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Describe in brief 'Aerated grit chamber'. 5
Explain the terms 'Super-chlorination and
Dechlorination'. When is Super-chlorination
of water done 5
Why is it economical to remove carbonate
hardness than non-carbonate hardness when
lime soda process is employed for softening
of water? 5
Describe pyrolysis as one of the methods of
solid waste disposal. 5
7. Design an alluvial channel based on Lacey's theory
of channel design to carry a discharge of 3 0
cumecs. The value of Lacey's Silt Factor can
be assumed as 1.0 and side slopes of the channel
as 112 H to I V. 10
At the location of a Hydraulic Jump type of
Energy Dissipater the discharge intensity
is 20 cumec/m., the prejump depth 1
is
1.90 m. Determine the post jump depth
required to form a stable jump. Also estimate
the amount of energy dissipated if a stable
hydraulic jump is formed. 5
(Contd.)
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What'is Phreatic line in an Earth Dam Give
the stepwise procedure of obtaining it by
Cassagrande's graphical method. 5
Discuss in brief 'stabilization of organic
matter'. ·. 5
Calculate quantity of sludge collected in
a primary settling tank per day with 60%
efficiency from 25 mid sewage having
suspended solids 400 mg/1 and inorganic
suspended solids 150 mg/1. 5
Why is it advantageous to digest sludge
anaerobically 5
Calculate quantity of bleaching powder
required per day to disinfect 200 ml pd water.
5
8. Design a Channel Transition at the location of an
Aqueduct using Mitra's approach. Normal width
and Flumed width of the channel are 15 m and
9 m respectively. The length of Transition is
16m. 10
How Reservoir capacity is determined from
Mass Inflow and Mass Demand curves
5
(Contd.)
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What are Galleries in a Gravity Dam State
their function. How the foundation gallery
makes its impact in the reduction of uplift
pressure below the structure 5
Enumerate diseases transmitted by water. How is
guinea worm disease controlled
Describe in brief 'Principles of house
drainage'.
Write a brief note on
5
5
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