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BTCE28
V SEMESTER B.TECH EXAMINATION, JANUARY-2013
HYDROPOWER ENGINEERING
Time: 3 Hours Max. Marks: 75
GROUP A : Answer any three questions. (Question No. 1 is compulsory)
Q.1 Give classification of pumps. (05)
Q.2 A pelton wheel having a mean bucket diameter of 1.0 m is running at 1000
rpm. the net head on the pelton wheel is 700 m. If the side clearance angle is
15 and discharge through the nozzle is 0.1 m3/s, determine power available at
the nozzle-and hydraulic efficiency of the turbine. (10)
Q.3 What is a hydraulic turbine? How are hydraulic turbine classified? (10)
Q.4 The following data is available for a hydropower plant :
Available head = 130 m; Catchments area = efficiency = 220 sq. km; Annual
average rainfall = 150 cm; efficiency = 91% percolation and evaporation ,
losses = 18 %. Determine power developed in MW taking load factor as unity
(10)
Q.5 A jet of water impinges on a series of curved vanes at an angle of 30 to the
direction of motion of the vanes while entering and leaves the vanes
horizontally. The head under which the jet issues from the nozzle is 30 m, the
co-efficient of velocity for the nozzle is 0.9 and the diameter of the jet after
leaving the nozzle is 50 mm. the speed of the vane is 10 m/s and the relative
velocity of the water at outlet is 0.8 times the relative velocity at inlet.
i. The angle of vane tips at inlet.
ii. The power developed by the jet and
iii. The effieicnye of the system (10)
GROUP B : Answer any three questions. (Question No. 6 is compulsory)
Q.6 D.B Francis turbine & Kaplan turbine. (05)
Q.7 What is a unit hydrograph? What are the limitations to use U.H? (10)
Q.8 A valve is provided at the end of a cast iron pipe of dia 150 mm and Of
Thickness 10 mm. The water is flowing through the pipe, which Is Suddently
stopped by closing the valve, Find the maximum velocity Of Water, when the
rise of pressure due to sudden closure of valve is 196.2 N/cm2. Take k for
water as 19.62x104 N/cm
2. & for cast iron Pipe as 11.772x10
6 N/cm
2
calculate the circumferential stress & Longitudinal stress developed in the pipe
well. (10)
Q.9 What are the applications advantages & disadvantages of hydro-electric
Power plants. (10)
Q.10 A vertical shaft francis turbine runs at 420 r p m while the discharge is
15m3/sec. The Velocity and Pressure head at enterance of the runner are
10 m/s & 230 m resp. The elevation above the tail race is 5 m . The dia
of the runner is 2 m and the width at the inlet is 270 mm. The overall
& hydraulic efficiencies are 92 % & 98 % resp Calculate (10)
1. Total head across the turbine 2. Power output
GROUP C: All Questions are Compulsory.
Q.11 Fill in the blanks ( each question carry 2 marks)
(i) __________ will be formed if the net positive suction head requirement for the
pump is not satisfied.
(ii) Air vessels are used in a __________ to reduce acceleration head.
(iii) In impulse turbines the work is done by the change in the __________ of the
jet.
(iv) The number of buckets on the periphery of a Pelton wheel is given by ______
(v) __________ can work under any head.
Q.12 Multiple choice question. (Each question carry 2 marks)
(i) The maximum hydraulic efficiency of an impulse turbine is equal to
(a) 1
2
cos (b)
1
2
cos ( c)
1
2
Sin (d)
1
2
Sin
(ii) A Pelton wheel is an
(a) Axial flow impulse turbine (b) Inward flow impulse turbine
(c) Outward flow impulse turbine (d) All of these
(iii) The power produced by a reaction turbine is
(a) Directly proportional to H
(b) Inversely proportional to H
(c) Directly proportional to H
(d) Inversely proportional to H
(iv) In a Francis’ turbine runner, the number of blades are generally
(a) 2 to 4 (b) 4 to 8 ( c) 8 to 16 (d) 16 to 24
(v) In the casing of a centrifugal pump the kinetic energy of the water is
converted to
(a) Potential energy (b) Pressure energy
(c) Heat energy (d) All of these
Q.13 True or false (each question carry 1 marks).
(i) Overall capital expenditure for a hydropower station is low.
(ii) The process by which water is released to the atmosphere by the plants is
called evaporation.
(iii) Water wheels are suitable for low water heads.
(iv) The hydraulic efficiency of a 6 (six) reaction turbine is the ratio of work done
on the wheels to the head of water.
(v) The slip of a reciprocating pump is the difference of theoretical discharge and
actual discharge.
******
BTCE33
V SEMESTER B.TECH EXAMINATION, JANUARY-2013
DESIGN OF RC STRUCTURE
Time: 3 Hours Max. Marks: 75
GROUP A : Answer any three questions. (Question No. 1 is compulsory)
Q.1 Design a circular overhead water tank of 200 kL capacity over a staging of 25
m. Assume suitable proportions and prepare detailed structural drawings. (05)
Q.2 Write a user friendly computer program to design torsion reinforcement in
rectangular and flanged beams, and plot the cross-sectional reinforcement
details on a graphic plotter. (10)
Q.3 An isolated T-beam has a 150 cm wide flange which is 10 cm thick. The web
is 25 cm. Determine effective width of the flange, if
(a) This beam is simply supported having 7 m effective span,
(b) This beam is continuous having 7 m effective span. (10)
Q.4 Design a clear water reservoir of 2000 kL capacity. It is square in plan and
completely under-ground. The depth of the tank should not be more than 6 m.
the net bearing capacity of the earth is 100 kN/m2 and depth of water table is
3m. Assume necessary data and prepare detailed drawings. (10)
Q.5 What are the different limit states of design? What are the merits of limit state
design philosophy over other design philosophies? (10)
GROUP B : Answer any three questions. (Question No. 6 is compulsory)
Q.6 Determine the shear stress in a 25 × 50 cm rectangular section if the shear
force is 20 KN and torsional moment is 10 KN m at service loads. Assume
M20 mix and 0.75% tension reinforcement at an effective cover of 50 mm.
(05)
Q.7 Discuss the Salient features of working Stress method & Ultimate load
Method. (10)
Q.8 Design a short column under biaxial bending with the following data
Size of Column = 45 × 45 cm
Concrete grade = M15
Steel grade = Fe415
Factored load Pu = 1000 KN
Factored laod Mux = 75 KN m
Muy = 60 KN m
Moments due to minimum eccentricity are less than the values given
above Reinforcement is equally distributed on four sides. (10)
Q.9 Design a beam 40 cm × 60 cm subjected to an bending moment of 150 KN m,
twisting moment of 20 KN/m and a shear force of 100 KN at collapse. Use
M25 mix & Fe 415 grade steel. (10)
Q.10 Give the step by step procedure to design a Pile foundation. (10)
GROUP C: All Questions are Compulsory.
Q.11 Fill in the blanks (each question carries 2 marks)
(i) A ____________ is the extension of a combine footing for a row of
columns.
(ii) In reinforced concrete floors. Movement joints should be spaced at not
more than ________ meters apart in two directions at right angles.
(iii) ______________ joint is a movement joint with a deliberate
discontinuity but no initiate gap between the concrete on either side of
the joint.
(iv) Effective height of a column of a framed structure depends on the
_______ of the column and various beams framing into the columns at
its two ends.
(v) Shear force is present in beams where there is a change in __________
along the span.
Q.12 Multiple choice question. (Each question carries 2 marks)
(i) The limiting valves of the depth of neutral axis Xm for different grades of
steel? (5)
(a) 0.002 y/Es 0.876
0.0035
Xmd
Xm
(b) 0.002 0.8756y/Es
0.0035
dXm
Xm
(c) 0.002 y/Es 0.876
0.0035
Xmd
Xm
(d) 0.002 y/Es 0.876
0.0035
Xmd
Xm
(ii) The moment of resistance is calculated by the following equation. (10)
(a) x = b 36.0
At 86.0
ck
y (b) x =
b 36.0
At 87.0
ck
y
(c) x= b 40.0
At 87.0
ck
y (d) x =
b 36.0
At 87.0
ck
y
(iii) Minimum tension reinforcement should not be less them that given by the
following. (10)
(a) y
0.85
bwd
Ao (b)
bw
0.85
bwd
Ao
(c) y
0.85
bwd
Ao (d)
0.85
y
bwd
Ao
(iv) Percent of tension steel p is equal to (10)
(a) b
At100 (b)
bd
At100
(c) bd
At
100 (d)
bd
At
(v) The wall is of plain concrete and provides stability of its weight.
(a) Gravity (b) Cantilever
(c) Butress (d) Conterfort
Q.13 True or false (each question carries 1 mark).
(i) Upto four stories, brick walls may be relied upon to resist successfully
earthquake or wind forces acting on the building with load bearing or filler
walls .
(ii) The base slab supports the wall and rests on soil .
(iii) Retaining walls and always designed to retain saturated earth fill.
(iv) Reinforced concrete walls in buildings are required to carry vertical loads s
well as lateral loads.
(v) A doubly reinforced concrete section is reinforced in both compression and
tension regions.
******
BTCE34
V SEMESTER B.TECH EXAMINATION, JANUARY-2013
FOUNDATION ENGINEERING
Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory)
Q.1 Write a type of samplers. (05)
Q.2 A vane, 10 cm long and 8 cm in diameter, was pressed into soft clay at the
bottom of a bore hole. Torque was applied and gradually increased 45 N-m
when failure took place. Subsequently the vane rotated rapidly so as to
completely remould the soil. The remoulded soil was sheared at a torque of
18 N-m. Calculate the chohesion of the clay in the natural and remoulded
states and also the value of sensitivity. (10)
Q.3 A retaining wall 5 metres high with a sloping back at 10 to the vertical
supports a choesionless backfill rising from the crest at an angle of 5 with the
horizontal. The backfill weighs 19 kN/m3 and carries a uniformly distributed
load of 5 kN/m2. The angle of shearing resistance of the backfillis 30 and the
angle of wall friction is 30 . Find by Rebhann’s graphical method the total
active pressure per metre. (10) (10)
Q.4 During a consolidation test, a sample of fully saturated clay, 2.0 cm thick is
consolidated under a pressure increment of 200 kN/m2. When equilibrium is
reached, the sample thickness gets reduced to 1.78 cm. the pressure is then
removed and the sample is allowed to expand and take water. The final
thickness is observed as 1.95 cm and final water content is 25% , if G = 2.72,
find voids ratio before and after consolidation. Also find mv over the range o
pressure applied. (10) (10)
Q.5 A field pumping-out test has the following data: (10)
i. Diameter of the well = 20 cm
ii. Thickness of confined aquifer = 30 m
iii. Radius of circle of influence = 350 m
iv. Drawdown during the test = 5 m
Pump discharge = 0.08 cumecs (10)
GROUP B : Answer any three questions. (Question No. 6 is compulsory)
Q.6 Explain one dimensional consolidation. (05)
Q.7 Two clay specimens A and B of thickness 2cm & 3cm, have equilibrium voids
ratio 0.68 and 0.72 resp. under a pressure of 200Kn/m2. If the equilibrium
voids ratio of the two soils reduced to 400Kn/m2. Find the ratio of the co-
efficient of permeability of the two specimens. The time required by the
specimen A to reach 40 percent degree of consolidation is ¼ of that required
by specimen B for reaching 40% degree of consolidation. (10)
Q.8 Explain Direct shear test. (10)
Q.9 A 6m high vertical wall supports a saturated, cohesive backfill (Ø = 0). With
horizontal surface. The top 3m of the back fills weighs 18KN/m3 & has
apparent cohesion of 18kn/m2. The bulk unit weight & apparent cohesion of
the bottom 3m of the backfill are 20kn/m3 & 24 kn/m
2 resp. What is the likely
depth of tension cracks behind the wall? If tension cracks develops, what will
be the total active pressure? Draw the pressure distribution diagram. (10)
Q.10 State various methods of the soil explorations and describe boring methods in
details. (10)
GROUP C: All Questions are Compulsory.
Q.11 Fill in the blanks (each question carries 2 marks)
(i) Well foundation comes under the category of ________ foundation.
(ii) Bulk density is the ratio of _______ of soil per unit.
(iii) The line within a dam section below which these are positive hydrostatic
pressure in the dam is called as _______ line.
(iii) Gravels is classified as ________ soil.
(iv) The total head at any point in the soil mass consists of three heads they are
________, ________, ________.
Q.12 Multiple choice question. (Each question carries 2 marks)
(i) Foundations for building on sandy soil must have depth for at least
(a) 0.1m (b) 0.5m (c) 0.8 to 1m (d) to 5m.
(ii) The value obtained for a soil sample from a shear test is known as:
(a) Angle of repose (b) Horizontal plane
(c) Angle of internal friction (d) Angle of shearing resistance.
(iii) Specific gravity is ratio of
(a) w/ s (b) s/ w (c) Vs /Vr (d) sub/ sat
(iv) Consolidation is a process of
(a) Air removal (b) Volume reduction
(c) Voids removal (d) Voids & Air removal.
(v) Optimum moisture content is the moisture content at which
(a) Settlement is maximum (b) Permeability is more
(c) Dry density is maximum (d) Shear strength is less.
Q.13 True or false (each question carries 1 mark).
(i) Vane shear test is used to determine the undrained shear strength of cohesion
soil.
(ii) The failure of a pile foundation is due to local shear
(iii) The C and parameters of soil are unique for that soil.
(iv) Isobar is a curve of soil is continued basically of cohesion or adhesion
between the surface of the paricles.
(v) Compaction can be achieved by rolling, tamping or vibration.
******
BTCE35 V SEMESTER B.TECH EXAMINATION, JANUARY-2013
RIVER ENGINEERING
Time: 3 Hours Max. Marks: 75
GROUP A : Answer any three questions. (Question No. 1 is compulsory)
Q.1 What are the types of tracers? Estate their properties. (05)
Q.2 Describe the slope area method of measurement of flood discharge in stream.
(10)
Q.3 Explain briefly Clark’s method in development of IUH. (10)
Q.4 Write short note on (10)
(a) Electromagnetic method
(b) Ultrasonic method
Q.5 Describe use of the mass curve to estimate the storage requirement of a
reservoir to meet a demand pettern. What are the limitation of flow mass
curve. (10)
GROUP B : Answer any three questions. (Question No. 6 is compulsory)
Q.6 Describe the various structural methods adopted for control of floods. (05)
Q.7 Explain the rational method of computing the peak discharge of a
small catchment. Where is it commonly used and what are tits merits and
demerits. (10)
Q.8 Describe briefly the moving boat method of stream flow measurement. (10)
Q.9 List the factors affecting the seasonal and annual runoff of a catchment.
Describe briefly the interactions of the factors listed by you. (10)
Q.10 The storage evaluation-discharge characteristics of a reservoir is as follows :
(10)
Elevation (m) 100.00 100.50 101.00
Discharge (m3/s) 12 18 25
Storage (103 x m
3) 400 450 550
GROUP C: All Questions are Compulsory.
Q.11 Fill in the blanks (each question carries 2 marks)
(i) Unique hydrograph is hydrograph showing a rainfall excess of ________.
(ii) Time of concentration tc for a small catchment is given by ________.
(iii) Runoff coefficient is a parameter having ________ unit.
(iv) Aridity index AI is defined as ________.
(v) Double mass curve is a method used for measuring the _______ of a rain
gauge station.
Q.12 Multiple choice question. (Each question carries 2 marks)
(i) Gumble property method is used for estimating
(a) Peak flood (b) Rainfall
(c) evaporation (d) Infiltration.
(ii) Standard project flood is a flood which has a relation of
(a) SPF is > PMP (b) SPF = PMP (c) SPF < PMP (d) PMP < SPF
(iii) Station year method is a method used for estimating the rainfall of an
area which are considered to be:
(a) Meterologicaly same (b) Meterologicaly different.
(c) Hydrologicaly same (d) Hydrologicaly different
(iv) Isohyets are the lines joining the places having:
(a) Same rainfall (b) same infiltration
(c) Same evaporation (d) none
(v) Isobars are places having;
(a) Same atmospheric pressure (b) same temperature
(c) Same rainfall (d) none
Q.13 True or false (each question carries 1 mark).
(i) Iylish method is a method used for peak flood
(ii) Envelop method is a method is applicable all over the world.
(iii) ‘S’ curve hydrograph is a hydrograph which shows unique excessrainfall.
(iv) Acityl alcohol is a compound used to reduce the evaporation rate.
(v) hydrograph is a curve which gives discharges Vs time.
******
BTCE37,BTME37
V SEMESTER B.TECH EXAMINATION, JANUARY-2013
OPERATION RESEARCH
Time: 3 Hours Max. Marks: 75
GROUP A : Answer any three questions. (Question No. 1 is compulsory)
Q.1 Discuss the significance and scope of OR in modern management. (05)
Q.2 What is travelling sales man model. (10)
Q.3 Explain esquecing problem in proper details. (10)
Q.4 What is assignment problem? Give two areas of its application. (10)
Q.5 State the assumption made in sequencing? (10)
GROUP B : Answer any three questions. (Question No. 6 is compulsory)
Q.6 Explain the primal-dual relationship. (05)
Q.7 Describe the transportation problem with its general mathematical
formulation. (10)
Q.8 Write a short note on degeneracy in transportation problem. (10)
Q.9 What is assignment problem? Give two areas of its application. (10)
Q.10 What purpose is served by including dummy activities in network diagram?
(10)
GROUP C: All Questions are Compulsory.
Q.11 Fill in the blanks (each question carries 2 marks)
(i) Operation Research introduce __________ into decision analysis.
(ii) In queuing theory __________ distribution is denoted by M.
(iii) North West Corner Method is used for __________ problem
(iv) CPM stands for __________.
(v) __________ is an event oriented technique.
Q.12 Multiple choice question. (Each question carries 2 marks)
(i) Queuing theory is associated with
(a) Inventory (b) Sales
(c) sales (d) production
(ii) The expected time is given by
(a) te = (t0 + 4tm + tp) / 6 (b) te = (4t0 + tm + tp) / 6
(c) te = (t0 + tm + 4tp) / 6 (d) te = (to + tm + tp)
(iii) Optimization can be applied to
(a) Linear programming (b) Transportation
(c) Assignment (d) Routing
(iv) Recorder Level is given by
(a) Lead time demand + safety stock (b) EOQ + Lead Time demand
(c) Safety stock + EOQ (d) None of the above
(v) Hungarian method is used for
(a) LPP (b) Material handling
(c) Assignment Problem (d) Queuing problem
Q.13 True or false (each question carries 1 mark).
(i) Stock may be positive, zero or negative.
(ii) CPM is an event oriented technique.
(iii) Vogel’s Approximation Method is used for Transportation Problem.
(iv) PERT is activity oriented
(v) If the behaviours of the system depends on the time it is said to be in steady
state.
******
BTCE38P-I
V SEMESTER B TECH IN CIVIL ENGINEERING
EXAMINATION JANUARY-2013
DESIGN OF RC STRUCTURES I
Time: 1 hours (5X5=25)
PART - A
Instructions: 1) ANSWER ALL QUESTIONS.
1. What are the different limit states of design? What are the merits of limit state design
philosophy over other design philosophies?
2. Find the moment of resistance of a beam 25 cm by 50 cm deep if it is reinforced with
2-12 mm bars in compression zone and 4-20 mm bars in tension zone, each at an
effective cover of 40 mm.
3. Explain flat slab system and grid slab system.
4. A T-beam of a roof is 75 cm deep upto centre of tension steel and has 140 cm
effective flange width. Its flange is 10 cm thick and web i9s 30 cm wide. Determine
the area of tension steel required to resist a moment of 100 kN safely. Assume M20
mix and HSD bars.
5. Design a circular column to carry an axial load of 1500 kN using
(i) lateral ties,
(ii) helical reinforcement. Use M25 mix and Fe 415 steel.
BTCE39P-II
V SEMESTER B TECH IN CIVIL ENGINEERING
EXAMINATION JANUARY-2013
FOUNDATION ENGINEERING
Time:1 hours (5X5=25)
PART - A
Instructions: 1) ANSWER ALL QUESTIONS.
1. Explain Soil as three phase system.
2. What is Specific Gravity & Density Index?
3. What are the factors affecting Compaction?
4. What are the modes of occurrence of water in soil?
5. What is mean by head gradient and potential?