Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January Automation-And-Robotics 3rd Sem 76503 Fluid Mechanics And Fluid Machines Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (Automation & Robotics) (2018 Batch) (Sem.?3)
FLUID MECHANICS AND FLUID MACHINES
Subject Code : BTAR-304-18
M.Code : 76503
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.
2.
Differentiate between dynamic and kinematic viscosity.
3.
State Pascal Law.
4.
What is specific speed of turbine?
5.
What is priming?
6.
Define overall efficiency of turbine.
7.
What is the difference between model and prototype?
8.
What are the various losses occurred in pipes?
9.
Name the various problems commonly experienced during operation of centrifugal
pumps.
10. What is Thomas Cavitation number?
1 | M-76503
(S2)- 647
SECTION-B
11. A pipeline carrying oil of specific gravity 0.87, changes in diameter from 200 mm at a
position A to 500 mm diameter at a position B which is 4 metre at a high level. If the
pressure at A and B are 9.81 N/cm2 and 5.886 N/cm2 respectively and the discharge is
200 litres/s, determine the loss of head.
12. The resisting force F of a plane during flight can be considered as dependent upon the
length of aircraft, velocity, air viscosity, air density and bulk modulus of air. Express the
functionality relationship between these variables and the resisting force using
dimensional analysis.
13. Discuss the working of Single acting Reciprocating Pump with diagram.
14. The internal and external diameter of the impeller of a centrifugal are 200 mm and
400 mm respectively. The pump is running at 1200 rpm. The vane angles of the impeller
at inlet and outlet are 20? and 30?. The water enters the impeller radially and velocity of
flow is constant. Determine the work done by the impeller per unit weight of water.
15. Derive equation to calculate specific speed in turbines.
SECTION-C
16. Derive Darcy Weisbach Equation.
17. The penstock supplies water from a reservoir to the Pelton Wheel with a gross head of
500 m. One third of the gross head is lost in friction in the penstock. The rate of flow of
water through the nozzle fitted at the end of the penstock is 2 m/s. The angle of deflection
of the jet is 165?. Determine the power given by the water to the runner and also
hydraulic efficiency of the Pelton wheel by assuming speed ratio 0.45 and Cv = 1.
18. Discuss constant efficiency curves of turbines.
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.
2 | M-76503
(S2)- 647
This post was last modified on 26 June 2021