Download AKTU B-Tech 4th Sem 2014-15 Hydraulics and Hydraulic Machines Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 4th Semester (Fourth Semester) 2014-15 Hydraulics and Hydraulic Machines Question Paper

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PAPER I?D : 100411
Roll No.
B. Tech:
(SEM. 'IV) THEORY EXALJINATION, 2014-15
HYDRAULICS -& HYDRAULIC, MACHINES
Tune : 3 Hours] [Total Marks : 100.
' N0te : , (1) Attemptall questions.
' ' (2) ' Assume suitable data,iif required.
1.? 7? Attempt any four parts of the fonowing: ? 5x4=20
.5 (a) .5Showthatfor arectangilarchannel with. given-area is ' '
Vnioxst?cmwhenhydmdipndinsishalfofdiedepth
A ofthe ?ow
.?(b) mmmmmm Explain
7 .mwmdlmehedformsmththehelpofneat
sketches.
(c) De?ne- Hydrw?c mean radius, hydraulic depth, section
factor and most e?cient channel cross section
(d) Derive the dynamic equation of gradually varied ?ow.
100411] 1 [ Contd...

(e)
(0
GO
(bi
(C)
00
100411]
Attempt any two parts of the following:
Attempt any two parts of the following:
On what factors does the Manning's mgosity coe?icient
depends.
What do yOu understand by channel of constant
velocity. Derive the relevant formula. _
2x10 = 20
?A wide rectangular channel carries a ?ow of
2.75 m3/s per meter width, the depth of ?ow being
1.5m. Calculate the rise of the ?oor level required to
produee a critical ?ow condition. What is the
conespondin'g fall in surface level.
What do you understand by speci?c energy for a ?ow
in open channel. Draw the speci?c energy diagram and
describe its valious characten'stics. '
De?ne conveyance of a channel. Find the discharge in
a trapezoidal channel with a bed width of 10m, side
slopes 1:1 and depth of ?ow of 0.2m under uniform
?ow condition. Bed slope is 1X10?4 and Manning's
roughness coemcie?nt = 0.025. Also ?nd Chezy's
coef?cient at this depth.
2x10 = 20
Sketch the G.V.F. Pro?le produced on
(1) Mild Slope
, (1i) Steep Slope
(Iii) Critical Slope
2 [ Contd...
(b)
?9
00
(b)
?9
5. Attempt any two parts of the following :
(a)
(b)
100411]
Attempt any two parts of the following:
A rectangular channel with a bottom width of 4.0 m
and a bottom slope of 0.0008 has a discharge of
1.50 m3 /s. In gradually van'es ?ow in this channel, the
depth at certain location is found to be 0.30m. Assuming
n = 0.016, determine the type of GVF pro?le.
Derive the dynamic equation of GVF, state its van'ovzs
assumption, also give the limitation of GVF.
2X10=20
What do you understand by term "Hydraulic?Jump".
Discuss the classi?cation of Hydraulic Jump and practical
applications of Hydraulic Jump.
A horizontal rectangular channel of constt. Width is ?tted
with a sluice gate.When the sluice gate is opened,water
issues with a velocity of 6 m/s and depth of 0.5 m
at the vena contracta.Determine wheather a hydraulic
jump will fonn or not.Ifso,calculate the energy dissipated.
Hydraulic jump is sometimes used as energy dissipater
at. the toe of the spillway of a dam, why? Discuss
different ways for obtaining the hydraulic jump. Prove
that relative height of the jump, depend only on ?ow
comesponding supercritical conditions F roude Number.
2X10=20
(1) ' Differentiate between?Impulse and reaction turbine;
Radial and axial ?ow turbine.
(ii) Write a note on characteristics curves for
Rotodynamic pumps,
Draw neat sketch of van'ous shapes of dra? tubes. Also,
explain the theory'of dra? tube.
3 ? [ Contd...

(c) A pelton- wheel turbine is to be designed for the
100411]
following speci?catiom :
Shaft power ='ll775kW
Head=400m, Speed= 750 rpm?
overall e?cicncy =86%, jet diameter to whegl diameter
ratio is not to exceed one sixth (1/6). Find.
('1) _ The wheel diameter
(1i) The number of jets required
(Iii) Diameter of the jet
Given Kvl = 0.985 and Kul = 0.45
4 . - [13750]