B.Tech. (AE) (2018 Batch) (Sem.-3)
FLUID MECHANICS AND FLUID MACHINES
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Subject Code : BTAE303-18
M.Code : 76401
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
Answer briefly :
- What is Friction Factor?
- State the assumptions of Bernoulli’s equation.
- Explain the phenomena of capillarity.
- What is a Continuum? Is Air a continuum?
- Define the following and give one practical example for each: Laminar flow, Turbulent Flow, Unsteady Flow and Uniform flow.
- What is the difference between ‘Pump’ and ‘Turbine’?
- State the conditions of Equilibrium of a floating body.
- What do you mean by ideal and real fluids?
- Distinguish between steady and unsteady flow.
- Define Compressible Flow.
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SECTION-B
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- Derive continuity equation for a three dimensional steady or unsteady flows in cartesian coordinate system.
- 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%.
- 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).
- Show that the Pelton turbine is low specific speed turbine.
- 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.
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SECTION-C
- With the help of a neat diagram explain the working principle of centrifugal pump.
- What is the difference, between axial radial and mixed flow turbine?
- 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 1/3rd 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 download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)
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