Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) Mechanical Engineering 2020 December 3rd Sem 76417 Fluid Mechanics Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ME) (2018 Batch) (Sem.?3)
FLUID MECHANICS
Subject Code : BTME-301-18
M.Code : 76417
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
Write briefly :
1.
Define Specific Volume and state its units.
2.
State Newton's law of viscosity.
3.
State Pascal Law.
4.
Explain stable equilibrium of submerged body.
5.
Define laminar and turbulent flow.
6.
Define Vortex Motion.
7.
What is the difference between model and prototype?
8.
What are the various losses occurred in pipes?
9.
Define Coefficient of Resistance.
10. What is Mach number?
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SECTION-B
11. What do you mean by Surface Tension? If the pressure difference between the inside and
outside of the air bubble of diameter 0.01mm is 29.2 kPa, what will be the surface tension
at air-water interface?
12. A wooden block of specific gravity 0.75 floats in water. If the size of block is such that its
length is 1 m, width is 0.5 m and height is 0.4 m, find its metacentric height.
13. The velocity potential function for a two dimensional flow is equal to x(2y?l). Find velocity
at point P(4,5) and calculate stream function at this point also.
14. Derive equation for sudden enlargement loss in pipes.
15. Explain the working of rota-meter with neat sketch.
SECTION-C
16. Derive Darcy Weisbach Equation for losses in pipes.
17. Derive continuity equation in cylindrical co-ordinates.
18. The pressure difference in a pipe of diameter D and length 1 due to turbulent flow depends
on the velocity V, dynamic viscosity, density and roughness k. Use Buckingham's Pi
theorem obtain expression for pressure difference.
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