Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 4th Semester (Fourth Semester) 2017-18 RCE401 Hydraulics And Hydraulic Machines Question Paper
Paper Id: 100431 Roll No.
B.TECH
(SEM IV) THEORY EXAMINATION 2017-18
HYDRAULICS & HYDRAULIC MACHINES
Time: 3 Hours Total Marks: 70
Note: Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
a. Define Different types of flow.
b. Determine the maximum discharge through a rectangular open channel of area
8m
3
with a bed slope of 1/2000. Assume manning?s constant 0.022.
c. Define the velocity contour?s in open channel flow.
d. What is the Back Water Curve?
e. Write the types of Surge.
f. What assumptions will take in Velocity Triangles?
g. Write the main Parts of Kaplan Turbines.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
a. Uniform flow occurs at a depth of 1.5 m in a long rectangular channel 3 m wide
and laid to a slope of 0.0009. If manning?s n=0.015. Calculate (a) Maximum
height of hump on the floor to produce critical depth (b) The width of
contraction which will produce critical depth without increasing the upstream
depth of flow.
b. In an open channel, the Froude number F remains constant at all depths. if the
specific energy E is constant Show that
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2
1
2
F
TE
BEh
??
?
??
??
?? ??
?
??
?
??
c. Prove that Hydraulically most efficient trapezoidal section is half of regular
Hexagon.
d. Integrate the differential equation of G.V.F. for a Horizontal Channel to get the
Profile equation as
??????????????
11
.
11
NM N
cc
c
c
hh
hh
h
x constt
SN M N
?? ?
??
?? ??
??
?? ??
??
?? ??
?? ?
??
?? ?
??
??
??
e. What is NPHS of centrifugal Pump? How it is related to cavitation in Pump?
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Printed Pages: 02 Sub Code: RCE401
Paper Id: 100431 Roll No.
B.TECH
(SEM IV) THEORY EXAMINATION 2017-18
HYDRAULICS & HYDRAULIC MACHINES
Time: 3 Hours Total Marks: 70
Note: Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
a. Define Different types of flow.
b. Determine the maximum discharge through a rectangular open channel of area
8m
3
with a bed slope of 1/2000. Assume manning?s constant 0.022.
c. Define the velocity contour?s in open channel flow.
d. What is the Back Water Curve?
e. Write the types of Surge.
f. What assumptions will take in Velocity Triangles?
g. Write the main Parts of Kaplan Turbines.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
a. Uniform flow occurs at a depth of 1.5 m in a long rectangular channel 3 m wide
and laid to a slope of 0.0009. If manning?s n=0.015. Calculate (a) Maximum
height of hump on the floor to produce critical depth (b) The width of
contraction which will produce critical depth without increasing the upstream
depth of flow.
b. In an open channel, the Froude number F remains constant at all depths. if the
specific energy E is constant Show that
???????????????????????????????????????
2
1
2
F
TE
BEh
??
?
??
??
?? ??
?
??
?
??
c. Prove that Hydraulically most efficient trapezoidal section is half of regular
Hexagon.
d. Integrate the differential equation of G.V.F. for a Horizontal Channel to get the
Profile equation as
??????????????
11
.
11
NM N
cc
c
c
hh
hh
h
x constt
SN M N
?? ?
??
?? ??
??
?? ??
??
?? ??
?? ?
??
?? ?
??
??
??
e. What is NPHS of centrifugal Pump? How it is related to cavitation in Pump?
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
(a) An open channel to be made of concrete is to be designed to carry 1.5m3/s at a
slope of 0.00085. Find the most efficient cross section for (a) Rectangular
section (b) Trapezoidal section (c) Semicircular section
(b) Define the following with formula (a) Kinetic Energy Correction factor (b)
Momentum correction factor
4. Attempt any one part of the following: 7 x 1 = 7
(a) Using Basic differential equation of G.V.F. show that dh/dx is positive for S1,
M3 and S3 Profiles.
(b) How you will define Transitions between Sub Critical Flow And Super Critical
Flow? Also draw the Diagram.
5. Attempt any one part of the following: 7 x 1 = 7
(a) A rectangular channel carrying a super critical stream is to be provided with a
hydraulic jump type of energy dissipater. It is desired to have an energy loss of
5 m in hydraulic jump when inlet Froude?s number is 8.5. What are the
segment depths of this jump?
(b) Derive the relation between velocity and depths of flow where positive surges
moving upward.
6. Attempt any one part of the following: 7 x 1 = 7
(a) In order to predict the performance of a large centrifugal pump, a scale model
of one sixth size was made with following specifications. Power = 25 KW,
Hman =7 mtr, N=1000rpm. If prototype works against 22m. Calculate its
working speed, the power required to derive it and the ratio of flow rates
handled by to pups.
(b) Define cavitation. And what precautions taken against Cavitation?
7. Attempt any one part of the following: 7 x 1 = 7
(a) A Pelton wheel is to be designed for the following specification. Shaft power
=11722 KW, Head =380 mtr, speed =750rpm, ?o = 86% Jet diameter (d) not to
exceed one-sixth of wheel diameter. Determine (i) The wheel Diameter (ii)
Number of jet required (iii) Diameter of jet Take velocity ratio Kv1=0.985 and
speed Ratio Ku1=0.45
(b) Define different types of efficiency of Hydraulic turbines.
?
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This post was last modified on 29 January 2020