Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (AE)-Automobile Engineering 2020 December 3rd Sem 76401 Fluid Mechanics And Fluid Machines Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (AE) (2018 Batch) (Sem.?3)
FLUID MECHANICS AND FLUID MACHINES
Subject Code : BTAE303-18
M.Code : 76401
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
What is Friction Factor?
2.
State the assumptions of Bernoulli's equation.
3.
Explain the phenomena of capillarity.
4.
What is a Continuum? Is Air a continuum?
5.
Define the following and give one practical example for each: Laminar flow, Turbulent
Flow, Unsteady Flow and Uniform flow.
6.
What is the difference between `Pump' and `Turbine'?
7.
State the conditions of Equilibrium of a floating body.
8.
What do you mean by ideal and real fluids?
9.
Distinguish between steady and unsteady flow.
10. Define Compressible Flow.
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SECTION-B
11. Derive continuity equation for a three dimensional steady or unsteady flows in cartesian
coordinate system.
12. A centrifugal pump delivers 1.27 m3/minute at 1200 rpm. The impeller dia is 35 cm and
breadth at outlet is 12.7 mm. the pressure difference between inlet and outlet of the pump
casing is 272 KN/m2. Calculate impeller exit blade angle if manometric efficiency is 63%.
13. In a steady flow, the velocity components are: u = 2kx; v = ky and w = ?4kz. Find the
equation of streamline passing through the point (1,0,1).
14. Show that the Pelton turbine is low specific speed turbine.
15. A jet 8 cm dia at 20 m/sec strikes a curved vane moving at 7 m/sec. the vanes are arranged
such that each vane appear before the jet in the same position at the same velocity. The jet
is deflected through 160?. Find the efficiency of the system.
SECTION-C
16. With the help of a neat diagram explain the working principle of centrifugal pump.
17. What is the difference, between axial radial and mixed flow turbine?
18. A Kaplan turbine is to be designed to develop 7357.5 KW shaft power. The available head
is 5.5 m assume speed ratio 2.09, flow ratio 0.68 and overall efficiency is 60 %. The BOSS
diameter is l/3rd of the runner diameter. Find diameter of the runner and speed of turbine.
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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This post was last modified on 13 February 2021