Q1.(a) Enalist the most common defects in timber. explain how they occur.8
(b)Draw a Neat sketche of dragline showing the various components. explain its working and uses. 8
A pentagon ABCDEA was run clockwise in a traverse survey. If the FB of line AB is 90, calculate the fore bearings of the remaining lines.4
What are the functions of providing rails in a track How is the weight of a rail section usually determined 4
Calculate the design traffic in MSA and CVD requied for design of
flexible pavement in rural areas as per revised IRC procedure for the
following data:
Annual average daily commercial vehicle at last count (July 2014) 150
Rate of traffic growth=
Design life=10 years
Vehicle damage factor= 1·5
The road is proposed to be completed in July 2017.
For a network shown in figure, normal time, crash time, normal cost and
crash cost are given in the table. Contract the network crashing it to
optimum value and calculate the optimum project cost. Indirect cost is
given as.dolar100 per day. 8

<img src='./qimages/1225-1e.jpg'>

Q2. What are the requirements of a good highway drainage system
Discuss. 10
What is contour gradient Explain the procedure of locating
contour gradient. 5
Explain the method of planing of concrete by concrete pumps. 5
A road transition between two straights consists of a pair of clothoid spirals meeting at a common point, the second straight deflecting to the right at an angle of 19° and a running distance of 360 metres. The curve is to be .designed for a maximum speed of 110 km per hour, a limiting centrifugal ratio of 1/4 and a maximum rate of change of radial acceleration of 30 cm. per square second in a second. Calculate the lengths of spirals and the radius of the curve at the point of compound curvature. 10
A 6° curve branches off from a 3° main curve in opposite direction in the layout of a B.G. yard. If the speed on the branch line is limited to 35 km per hour, determine the maximum permissible speed on the main line using both Cant formula and Railway Board formula. 10
Q3.(a) The traffic flow in an urban section at the intersection of two highways -in the design year are given below
<img src='./qimages/1225-3a.jpg'>
The highways with carriageway width of 15 m at present intersect at
right angles and rotary intersection is proposed. Compute the traffic
flow from and on each leg in the rotary and draw the schematic traffic
flow diagrams. 10

Explain the causes. of failure of foundations and their remedial
measures. 10
In a triangulation survey the altitudes of two proposed triangulation stations A and B 100 km apart are respectively 400 m and 630 m. The intervening obstruction. situated at 68 km from A has an elevation of . 415 m. Ascertain if A and B are intervisible and if necessary find how much B should be raised, so that the line of sight must nowhere be less than 3 m above the ground. 10

Describe the working of pneumatic tyred roller and tamping roller. Also indicate the areas of application. 10

State the important properties of concrete which govern the design of concrete mix. Explain them in brief. 5
Discuss various systems of ventilation with neat sketches. 5
A closed traverse was conducted round an obstacle and the following observations were made. Work out the missing quantities. 10
<img src='./qimages/1225-4b.jpg'>

draw a neat sketch of a typical layout of a railway level crossing, indicating the various components. Discuss critical aspects of the layout. One kilometre straight length AB of a highway changes elevation 10
from 200 m to 250 m above mean sea level. On a vertical photograph taken with a camera having focal length of 20 cm, the portion of the road measured is 8 cm. Calculate the flying height 5
Calculate the safe stopping sight distance for design speed of 60 kmph for two way traffic on a single lane coefficient of friction as 0·35 and reaction time of driver as 2·5 sec. 5

SECTION B
Q5.(a) Compute the basewidth of elementary profile of a gravity dam based on stress criteria. Also decide whether the dam is a high gravity dam or not. The height of the dam is 80 m. Unit weight of water is 1 ton/m3 • Free board is zero. Uplift pressure coefficient is zero. Specific gravity of the dam material is 2·5. Allowable compressive stress of dam material concrete is 250 ton/m2 . 8

Explain the various effects of water-logging. 8
Discuss the effects of horizontal and vertical accelerations of
earthquakes on gravity dams in reservoir empty and full conditions. 8
What is an intake structure Enumerate various types of intakes.
Explain the river intake with a neat diagram. 8
For water supply of a town, water is pumped from a reservoir 3 km away. The maximum difference of level between the river and the reservoir is 20 m. The population of the town is one lakh with a per capita demand of 150 /pd. If the .pumps are to operate for 8 hours daily, and the efficiency of the pumps is calculate the BHP of the pumps. Assume friction factor as 0·0075, velocity in the pipe as 2 mis and a maximum daily demand of 1 ·5 times the average demand. 8
Q6.(a) The Horton's infiltration equation for a basin is given by f 6 16e-2t where is in mm/hr and is in hours. What are the values of f fe and k If a storm occurs on this basin with an intensity of more than 22 mm/hr, determine the depth of infiltration for the first 45 minutes and the average infiltration rate for the first 75 minutes 10
What is Environmental Impact Assessment and why should we have EIA for any development project What are the important points considered for preparing the environmental impact statement 10

write the sorrces for radioactive wastes and their safe disposal.
Explain bri,fly the factors affecting consumptive use of water and double mass curve. 5
Explain break point chlorination with a neat diagram.
The quantity of chlorine used to treat 20,000 m3 of water per day is 8 kg. The residual chlorine after contact period of 10 min is Explain th.. protection works at the downstream of spillways when the jbmp height curve lies lower than tail water curve (TWC.. at all discharges. found to be 0·2 mg/l. Calculate the chlorine dosage in mg/l and the chlorine deJ.and of water. 5
What is construction pore pressure Explain how the upstream
and dowrtsti:-eam slopes fail due to it. 5
The water level in an open well was depressed by 3·0 m by pumping and
it recuperated 1 ·5 m in 60 minutes, while doing a recuperation test. Find
the i
yield from J well of 3·5 m diameter under a depression head of
2·8.m,and.
diameter of the well to yield 8 It/sec under a depression head of
2m. 10
plain the follow..ng as shortanswers

Syphon AqJiduct · 3
Attracting Joynes 3
(iii)Canal escape 2
Cylinder fall 2
Describe thl working of oxidation pond with a neat diagram.
Write its adtantages and disadvantages. 5
Briefly explain the Environment (Protection) Act, 1986. 5.
C-HENT-N-BDUFB 6
Q8.(a) The peak of a flood hydrograph due to a 6-hour storm is 4 70 ma/sec. The
mean depth of rainfall is 8 cm. Assume an average infiltration loss of 0·25 cm/hr and a constant base flow of 15 ma/sec. Estimate peak
discharge of a 6-hour unit hydrograph for this storm. 10
Explain the procedure for preparing a layout for a sewerage system and
list out the different types of sewers in the order of their occurrence. 10
Write causes and effects of hardness and its removal by lime-soda
process. 5
Explain duty and delta and their relation in brief.
If the field capacity of the soil is permanent wilting point is
density of soil is 1•4 g/cma
effective depth of root-zone is 72 cm and daily consumptive use of water for the given crop is 12 mm, find the watering frequency to ensure efficient irrigation to the given crop. Readily
available moisture is same as available moisture. 10