Download AKTU B-Tech 3rd Sem 2018-2019 Fluid Mechanics Rce 303 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) 2018-2019 Fluid Mechanics Rce 303 Question Paper

Printed Paes: 02 Sub Code: RCE303
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B.TECH.
(SEM III) THEORY EXAMINATION 2018-19
FLUID MECHANICS
T im: 3 Hours T otal Marks: 70
Note: 1. Attempt all Sections. lt?require any missing data; then choose suitably.
SECTION A
l. Attempt all questions in brief. 2 x 7 = 14
:1. Draw the ?gure of shear stress VS Rate of Defamation.
b. De?ne perfect gas.
e. What do you understand by Stable equilibrium?
d. The velocity distribution between two parallel plate is given by u;(laz-y3) where
u is the velocity at a distance y from the middle of the two plates. Find the
expression for stream function.
6. De?ne surface [055.
f. What do you understand by Dimensional Homogeneit) '7
g. Find the frequency of oscillation when a '72 Km/hr wind blows across a
telephone wire of 3 mm diameter take 11? -1 5x10' m~/s
SECTION!
2. Attempt any three of the following 7 x 3 =3?21
a. Explain the procedure of?ndmg hy drostatic forces on curved surfaces
b, What are the different tans on which models are designed for dynamic
Similarity? '
c. W hat are the '?ercnt laws on which models are designed for dynamic
Similarity? 3.,
d. Draw the pressure distribution theoretical as well as experimental, on an airfoil
in the ?uid ?ow
e. What 15 the difference between Eulerian and Lagrangian approach?
SECTION c' '
3. Attempt any one part of the following: ?3 7 x 1 = 7
(a) What is the importance of Model?Testing?
(b) Determine the Bulk ModuluSQf elasticity and compressibility of a liquid. If the
pressure of liquid is increased from 70N/cm2 to I30N/cm2. The volume of
liquid decreases by 945%.
4. Attempt any one part of the following: 7 x 1 = 7
(a) A model boat. 1/50 of its prototype experienced 0.2 N when simulating a speed
of 5 111/5. Find the corresponding resistance of the prototype considering
resistance at free surface only. Water is used for model as well as prototype
also
(b) Mention the important dimensionless numbers used in ?uid mechanics and
their signi?cance.
llt?age

Attempt any one part of the following: 7 x l = 7
(a) A 30 cm diameter horizontal pipe terminates in a nozzle with the exit diameter
of 7.5cm.if the water ?ows through the pipe at a rate of 0. 15m3/sec .What force
will be exerted by the ?uid on the nozzle?
(1)) Find the discharge from an 30mm diameter external mouth piece ?tted to a side
of a large vessel if the head over the mouthpiece is 6mtr,
Attempt any one part of the following: 7 x l = 7
(a) A kite 60cm x 60cm is size weighing 3 N makes an angle of 10? with the
horizontal. The thread attached to makes an angle of 45? to the horizontal and
pull on the string 25 N the wind is ?owing over the kite 15 m/s. Find CL and
CD for the kite.
(b) Explain the displacement thickness, momentum thickness to related to
boundary layer.
Attempt any one part of the following: 7 x l = 7
(a) A pipe tapers from 250 mm to 125mm the rate of ?ow of the liquid in the pipe
is 24000 lit/min. Calculate average velocity of ?ow at the two sections.
(b) Find the displacement thickness for velocuy Mibution m the boundan layer
given b\-
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