CS (Main) Exam2015 CIVIL ENGINEERING (PAPER-II)


What are the constituents of a good brick earth Discuss the properties of a
first class brick. Describe the tests to be performed to check the quality of
bricks.

A national highway with dual 2-lane carriageway is to be constructed in the
year 2017 for a design life of 25 years. However, traffic count reveals that only
2000 commercial vehicles (summation of both directions) are plying per day in
the year 2015 and annual rate of increase in commercial vehicles is 5%. Hence,
from economical reasons, it was decided to construct new flexible pavement for
this national highway in stages initially for a period of 15 years. Determine the
traffic for which this new flexible pavement is to be designed assuming vehicle
damage factor as 48. Assume any other data suitably, if required.

Explain various uses of a contour map in Civil Engineering projects.

An aerial photograph was taken from a flying height of 15 km above m.s.l.
A straight portion of a canal measures 20 cm on this photograph, whereas
it is 10 km on the ground. If the height of the terrain is 5000 m above
m.s.l., compute the focal length of camera lens used for taking the
photograph.


What are the basic requirements to be considered for construction of a railway
track to achieve higher speeds and better riding quality Sketch a typical
cross-section of a BG railway track for double line on curve in cutting section.
5+5=10

Define PERT and discuss its significance. Explain different time estimates used
in PERT. 10

2. What is meant by proportioning of concrete Discuss its properties. Describe
different methods of proportioning concrete. 15

Answer the following

Differentiate between open-graded and dense-graded bituminous
construction. 5

What are the general requirements of a bituminous mix 5

Write the purpose of tie bars and dowel bars in joints of cement concrete
pavement. 5

What are the different types of machinery required at civil construction
project Discuss the factors which influence the performance of an earthmoving
machinery. 20


3. Enumerate the tests to which a stone should be subjected for making it fit for
building construction purposes. What is meant by dressing of stone What are
the advantages of quarry dressing 15

From the following data of a traverse, compute the length CD, if traverse
stations D and B are in a straight line 15

Answer the following

Briefly explain the weaving angle and weaving length with reference to
traffic rotary. 10

What are the various factors to be considered in the design of traffic
islands for channelized intersections Briefly explain, with the help of
sketch, how speed of vehicles can be controlled by using traffic islands at
intersections. 5+5=10

4. What do you mean by scheduling of a Civil Engineering project What are the
advantages of scheduling Discuss the classification of scheduling. 15

Using the following details of trains running on a 3° main BG curve track,
determine equilibrium cant for equilibrium speed and length of transition
curve to be adopted

Assume—
maximum permissible speed on the curve as 80 kmhr;
allowable cant deficiency as 75 cm;
weighted average may be used as the equilibrium speed of trains.
7,a+71=15

The following data were entered in a level book, where some entries were
omitted (marked with x). Find out the missing data and apply checks 20
Station

5. List the methods available for estimation of runoff in catchments. In detail,
explain the rational method used for estimation of runoff in urban catchments.

Define duty and delta. Derive a relationship between duty and delta. Using this
relation, find delta for a crop with base period of 100 days. The duty of the crop
is 432 hacumec.

Explaining the objectives of river training, discuss the methods used for river
training.

A town with population of 1 lakh is supplied with 150 lpcd of water. The
chlorine required for disinfection was found to be 0-28 mg1 and residual
chlorine required was 0-2 mg1. Estimate the chlorine dose and quantity of
bleaching powder required per year (in kgyear), if available chlorine in
bleaching powder is 30%.

Explain the importance of CODBOD ratio while designing the treatment
options for CODBOD ratio of 3 and and justify the selection of treatment
units.

6. A 20 cm well penetrates 30 m below the static water level. Water is pumped at
the rate of 1800 1pm, and the drawdown in the wells is observed as 1-2 m and
0-6 m. The observation wells are 12 m and 36 m from the well. Determine—

the transmissibility of the aquifer;
the drawdown in the pumped well taking R as 300
the specific capacity of the well. 15

Describe the methods used for determining mean depth of precipitation in
catchments when point rainfall data are available. 15

The following data are collected to determine irrigation requirement. The water
application efficiency is 65% and consumptive use coefficient in the growing
season is 0-8. Find evapotranspiration and irrigation requirement 20


Design and sketch the shape of an ogee spillway using the data given below
Upstream head of water, H 20 m
Shape of upstream face 1 15
fc 1939, n 181

Design the water main to supply water from reservoir to a city with a
population of 5 lakhs. Assume per capita demand as 270 lpd and peak factor
as 18. Also, find the hydraulic gradient at which the main is to be laid. Take,
velocity of flow as 12 ms and CH =110.

Using the data pertaining to Activated Sludge Process given below,
determine—
efficiency;
volume of aerator;
(iii) hydraulic retention time
volumetric loading.
Wastewater flow 20 MLD
BOD in settled wastewater 200 mg1
Effluent BOD required 1 5 mg1
FM ratio 02
MLSS 3000 mg1

8. diluted wastewater was subjected to BOD test and the following
observations are recorded
DO of water used for dilution 3-6 mg1
DO of wastewater sample 08 mg1
DO in sample after 5 days 0-7 mg1
^20 -012day
Determine—
BOD of wastewater;
ultimate BOD. 15

Describing the major categories of pollutants generated by thermal power
plants, discuss the environmental impacts of thermal power plants. 15

With the help of flow diagram, explain various elements involved in municipal
solid waste management. 20