Download AKTU B-Tech 3rd Sem 2015-2016 ME 302 Fluid Mechanics Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 3rd Semester (Third Semester) 2015-2016 ME 302 Fluid Mechanics Question Paper

Time : 3 hours]
Printed Pages : 5 272 ME-302
(Following Paper ID and Roll No'. to be filled in your
Answer Book)
R011N0-Llllllllll
B.Tech. '
(SEM. 111) THEORY EXAMINATION, 2015-16
FLUID MECHANICS
[MaximumMarks: 100
Section-A
Attempt all sections. All sections carry equal marks.
Write answer of each section in short. 10X2=20
(a) De?ne cavitation.
(b) State Pascal?s Law and give seme examples where
it is applied. '
(c) What is the importance of dimensional analysis?
(d) List out different losses in ?ow through pipes.
(e) How can we de?ne the term ?ow over a halfbody.
(1) mo.
(f) De?ne computational ?uid dynamics (CFD) and
state its applications.
(g) What is the water hammer?
(h) De?ne the concept of separation of boundary layer
with help of neat sketch.
(i) Give some applications based oh Bernoulli?s
equation.
(j) Distinguish between the laminar and turbulent ?ow."
Section-B
Note: Attempt any ?ve questions from this section.
Q2.
Q3.
10X5=50
If the velocity pro?le over a plate is a parabolic curve
with the vertex 20 cm from the plate, where the velocity
is 120 cm/see. Calculate the velocity gradients and shear
stresses at a distance of 0, 10 and 20 cm from the plate, .
if viscosity of the ?uid is 8.5 poise.
Define the term surface tension and derive the
expression for surface tecsion on liquid droplet with the
help of sketch.
(2) ME-302 '

Q5.
Q6.
Q7.
An inverted U-tube manometer is connected to two
horizontal pipes A and B through which water is ?owing.
The vertical distance between the axis of these pipes is
30 cm. When an oil of speci?c gravity 0.8 is used as a
gauge ?uid, the vertical heights of water columns in the
two limbs of the inverted manometer (when measured
from the respective centre lines of the pipes) are found
to be same and equal 0 35 cm. Determine the difference
of pressure between the pipes.
What do you understand by total pressure and center of
pressure? Derive an expression for force exerted on a
submerged inclined planed plane surface by the static
liquid and locate the position of center of pressure.
Describe the governing equation of CPD. Comment on
computational ?uid dynamics as a design to] also discuss
the advantages of CFD.
Determine the form of equation for the discharge Q
through a sharp edged triangular notch that depends upon
the notch head H, acceleration due to gravity g, Central
angle a and velocity of approach V.
(3) P.T.O
Q8. (a) A 300 mm diamter pipe cam'es water under a head
of 20 m with a velocity of 3.5m/s if the axis of the
pipe tums through 45?; ?nd the magnitude and
direction of the resultant force ar the bend.
? (b) If for a 2-D potential ?ow, the velocity potential
is given by = x (2y- 1) Determine the velocity
at the point P (4, 5). Determine also the value of
stream function at the point P.
Q9. De?ne the laminar boundary layer, turbulent layer,
laminar sub-layer, boundary layer thichnes &-
displacement thickness.
Section-C
Note: Attempt any two questions from this section
2X15=30
Q10. a) De?ne the term meta- center and meta- centn'c
height. Den've the expression for the meta- centn'c
geight of a ?oating body.
'b) With neat sketches, explain the conditions of
equilibrium for ?oating and sub-merged bodies.
. (4) ME-302?

Q11 De?ne'following terms:
a) Capillarity
b) Kinematic viscosity
c) Compressibility
d) Vapour pressure
e) Velocity Potential F unction.
Q12. Derive the expression for the shear stress, velocity
distribution, pressure drop and head loss for viscous ?ow
between two parallel plates.
(5) ME-302