CIVIL ENGINEERING
Paper II
I Time Allowed.: Three Hours I I Maximum MarKs: 200 I
INSTRUCTIONS
. .
Candidates should atlempt question nos. I and 5
. which are compulsory, (md any THREE of the
remaining questions, sdlecting at least ONE
question from each Section .
•
• All questions carry equal marks.

•·
The number of marks carried by each pat11
subpart of a is indicated against each
· •.., · Answers must be written in ENGLISH only.
.. ..
If any data is considered insufficient,
assume'·siiitable value and indicate the same
m your answer.
Unless otherwise indicated, symbols and
• 1wtations have usual meanings.
(Contd.)
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I

Section •
1. Answer any four parts of the following
(a)What are different types of lime Give their
composition, source of manufacture, characteristic
and use. 10
(b)The following data refer to an exercise in trigonometrical levelling
Horizontal distance between P and Q 9290m
Angle of elevation from P to Q 2°6'18"
Height of signal at Q 3.·96m
Height of instrument at P 1·25m
coefficient of refraction 0·07
R sin 1" 30.88m, RL of P 396.58m
Find the RL of Q from these observations. 10
stretch on one of the National highways
has 10cm thick old cement concrete
pavement in good condition. Due to recent
increase in wheel load, a monolithic
thickness of 20cm is found to be necessary
for strengthening. Find out the concrete
overlay thickness necessary for unbonded
condition. Use the following data
Co-efficient depending upon good condition
l
co-efficient if poured directly on old
pavement= 1·4, 1.4, and 1/1.4

(ii)For a 12·8m rail length of B.G. track,
calculate the quantity of materials required.
per kilometre length of track. Assume
sleeper density to be equal to
Type of rail 90R, i.e. wt 44·7
type of sleeper is wooden. 5

a capacity study the following
classified hourly lane volumes are
observed in a traffic survey on a
particular section of a city street under
mixed 'traffic conditions. Using PCU
equivalents as, per Indian practice,
convert these hourly volumes into
passenger car units.
<img src='./qimages/1370-1d1.jpg'>

(ii)Write a note on highway financing in
India. 5
(e)How do you define an activity and distinguish
between a critical and non critical activity.
Explain with example. 10

Write about the requirements, purpose of
constructing cavity walis. Give the general
specifications of constructing these walls. lO

(b)Give the general description of the stabilised
cement soil wall for building construction.
What is the composition of soil its characteristics,
requirements of mixing water,
cement, compaction, form work in constructing
the walls? 10
(c)Enumerate and describe the requirement of
equipments for a high rise RCC building
construction in a densely populated city. 10
(d)Write short notes on the. following with
examples:
(i)Crashing of an activity 5
(ii)The three phases of CPM 5

3.(a)In a triangle, station C was a church spire
and hence could not be occupied. A satellite
station S was selected 12m from C and
inside the triangle ABC. From angles
CSA 135°40'20" and ASB 71°29'20" were
measured and the lengths AC and BC were
known to be approximately 2510m and 1895m
respectively. Compute the angle ACB. 10
compound railway curve ABC is to have the
radius of the arc AB 1200m and that of BC
800m. The intersection point V of the end
straights is located and the deflection angle is
observed to be 35°6'.If the arc AB is to have
a length of 400m, calculate the tangent length
VA and VC. 10
(c)Write about steel and iron work in building
construction with regard to material specifications,
sections used, fabrication. finish and
erection. 10
(d)What are the different hauling equipments
listing their salient features, application and
limitations. 10

4.(a)Determine the warping stresses at comer longitudinal
and transverse edge region for a 20cm
thick rigid pavement with 15m spacing transverse
joints, lane width 3·6m. The modulus of
subgrade reaction is 2·8 kg/cm3. Take the
following values of various factors:
Thermal co-efficient of concrete 10-6 per°C.
Modulus of elasticity of concrete 2·8x105 kg/cm2.
Poisson's ratio, mew 0·15.
Radius of contact area 16 cm.
Bradbury's stress co-efficients for the given
geometric condition of slab cx= 1·03, cy 0·35.

train having 25 wagons weighing 20 tonnes
each is to run at a speed of 60 kmph. The
tractive effort of locomotive is 18 tonnes.
The weight of the locomotive is 120 tonnes .
Rolling resistance of locomotive and wagon
are 3 kg/tonne and 2·5 kg/tonne respectively.
Find out the steepest gradient of the track for
these conditions. l0
(c)Determine the transition length based on permissible
speed for a 3° curve with maximum
permissible speed of l00 kmph on a B.G.
railway track. 10
a brief account of typical maintenance
procedures of flexible and rigid
pavements. 5
(ii)Explain how dust nuisance is prevented
in earth roads and gravel roads. 5
Section
5.Answer any four parts of the following

(a)Find the capacity of a reservoir from following data:
<img src='./qimages/1029-5a.jpg'>
Use both, prismoidal and trapezoidal,formulae
and compare the results. 10
(b)Explain the following
(i)Unit hydrograph and. its application to
forming Flood hydrograph. 5
(ii)Function of a check-dam. 5

(c)Enumerate and discuss the common tests that
should be conducted for the examination of
water at laboratory attached to water treatment
plant, also explain the significance of these
tests. 10
(d)Discuss the variations in the sewage flow and
their effects on the design of various
components of a sewerage scheme. 10
(e)What is air pollution Discuss different
primary and secondary pollutants with their
effects in brief. 10

6.(a)Calculate balancing depth for a channel section
having bed width 14·00m, side slopes= 1:1 in
cutting and 2:1 in filling. The bank
embankments are kept 3·5m higher than berm
level. Crest width of banks is kept 3·00m. 10
(b)How is the capacity of a reservoir determined
from mass inflow curve How is the safe yield
from a given storage capacity determined 10

weir is constructed across an alluvial
river, with a horizontal floor of 70·0m
length and retains 5·0m of water under
full pond condition. If the downstream
sleet pile is 'riven to a depth of 8·0m
below average bed level, calculate the
exit gradient. 5
(ii)Explain following, in brief, giving two points each 5
1. Borrow pits
2. Spoil banks
3. Ridge canal
4. Inundation canal
(i)What controls do you suggest to prevent
contamination of ground water in coastal
areas Give at least four points to
control the same. 5

(ii)An artisian tube-well of 20·0cm diameter
draws water from a 30·0m thick aquifer.
Its permeability is 26·0m/day. Find the
yield under a drawdown of 5·0m at the
well face. Assume radius of influence=245·0m. 5

7.(a)(i)What are the requirements of a good
intake structure
(ii)Discuss various factors which govern the
location of an intake. 5+5
(b)What is type I settling? Derive an expression
for type I settling. How analysis of type I
settling is done? 10

(c)(i)Discuss the use of tables and nomograms
for hydraulic calculations for the design
of sewers.
(ii)Determine the size of a circular sewer for
a discharge of 1·5m3/sec. The sewer is
running half-full. For 0·5, q/Q 0·5.
Assume n 0.014 and i 1:10,000. 4+6

(d)Discuss the working of a skimming tank with
the help of a neat sketch. How are disposal of
skimmings done 10

A saddle siphon has following data
Full reservoir level 435·0m.
Level of centre of siphon outlet= 430·0m.
Width= 4·2m, height= 2.2m.
Determine number of siphon units
required to pass the flood safely. Siphon
discharges freely into the air. Assume
coefficient c 0·66. 5
(ii)Describe the types of joints provided in
gravity dam. 5

5·0m wide rectangular channel carries
water to a depth of 1·2m. Channel width
is reduced to 2·5m with a hump of
0.35m at the bottom to facilitate
measurement of discharge. Calculate the
discharge if surface of water in con-
tracted section drops by 0·15m. Assume
no losses. 5
(ii)What are advantages and disadvantages
of canal lining? Mention- five points of
each. 5
(c)Discuss the physical and chemical composition
of Municipal solid wastes. Also give their
typical values for Indian conditions. 10
Discuss the need of Environmental Impact
Assessment. Also discuss the Environmental
Impact of thermal power plants. 10