PTU B.Tech Aerospace Engineering 3rd Semester May 2019 70903 FLUID MECHANICS and MACHINERY Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 3rd Semester AREO-Aerospace-Engineering

Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech. (Aerospace Engineering) (2012 Onwards) (Sem.?3)
FLUID MECHANICS & MACHINERY
Subject Code : ASPE-201
M.Code : 70903
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.

SECTION-A
1)
Attempt the following :


a. Define specific gravity

b. Define dynamic viscosity

c. Define Gauge pressure

d. Define Pathline

e. Define degree of reaction

f. Define coefficient of discharge.

g. State Buckingham pi theorem.

h. Define Fluid.

i. What is the SI unit for 'Head' as used in Hydraulic machines?

j. Define specific speed.
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SECTION-B
2)
Derive Bernoulli's equation. NOTE: Mention the assumptions clearly. [2M for
assumptions, 3M for the derivation]
3)
Explain the working of Mercuric manometer and explain how absolute pressure and
gauge pressure of a system can be measured using this manometer.
4)
Explain the working of Fransis turbine with help of a neat velocity diagram.
V


5)
A velocity field is given by the relation
o
V
(xi ? yj )


. Where Vo and I are
I
constants.

i. Find the location in the flow field where the speed is equal to Vo

ii. Determine the streamlines.
6)
With the help of a neat diagram, explain the working of a vane pump.

SECTION-C
7)
A centrifugal water pump has an impeller of width h = 5 cm, an inner radius of 7 cm, and
an outer radius of 30 cm. It turns at 1,800 rpm. The inlet velocity is 6 m/s and the exit
velocity is 7 m/s. Find the theoretical values of :

a) Discharge rate

b) Torque

c) Head

d) Pressure rise across the impeller.
8)
Apply Buckingham Pi theorem to a turbomachine and obtain its non-dimensional
parameters.
9)
Through control volume analysis, obtain Euler's equation for turbomachinery.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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