RGPV FLUID MECHANICS PAPER

1. S/2020/6254
[1]S/2020/6254 Total Pages : 4
Fourth Semester
Mechanical Engineering / RAC / Elect. Mech. Engg.
Sixth Semester
PTDC Mech.
Scheme July 2008
FLUIDMECHANICS&HYDRAULICMACHINES
Time : Three Hours Maximum Marks : 100
Note : i) Attempt total five questions out of eight.
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ii) In case of any doubt or dispute, the English version question
should be treated as final.
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1. a) Definekineticviscosity. 3
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b) What is the difference between steady and unsteady flow. 3
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c) WritetheNewton’slawofviscosityandexplainit. 6
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d) Diameter of a pipe decrease from 8cm at one end to 4cm at
other end. If water flows in the pipe at the rate of 100 liter/sec.
Find out velocities of water at both the ends of pipes. 8
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go 100 brQ>a/goH|$S> nmZr ~h ahm h¡ Vmo XmoZm| ì¶mgm| na J{V {ZH$m{bE&
2. a) Calculateheightofwatercolumnequivalentto10barpressure. 3
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b) WritetheprincipleofManometer. 3
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P.T.O.

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c) WritedownthelimitationofBernoulli’sequation. 6
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d) ExplainPiezometer.Howtheyareusedforthemeasurementof
pressure. Write down the type of mechanical gauges used for
measuringpressure. 8
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g‘PmBE? Xm~‘mnr ‘¡Ho${ZH$b JoO {H$VZo àH$ma Ho$ hmoVo h¢&
3. a) Writethedifferencebetweensmallorificeandlargeorifice. 3
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b) Define: 3
i) Potentialenergy
ii) Kineticenergy
iii) Pressureenergy
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ii) J{VO D$Om©
iii) Xm~ D$Om©
c) Deriveequationfordischargeformulaforventurimeter. 6
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d) Define Pitot tube, write down the principle of pitot tube and
application of pitot tube. Derive the velocity formula for pitot
tube. 8
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4. a) Write down the properties of Vena-Contracta. 3
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b) DefineMouthpieces. 3
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Contd.....

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c) WhatarevariousHydrauliccoefficientexplain. 6
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d) Derive equation of loss of head due to sudden enlargement. 8
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5. a) Write the difference between a weir and notch. 3
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b) What are the advantage of triangular notch over rectangular
notch? 3
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c) Deriveanexpressionforimpactofjetonamovingcurvedplate.
6
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H$s{OE&
d) DerivetheDarcy’sequationforthedeterminationoflossofhead
orenergyduetofrictioninpipeline. 8
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H$s{OE&
6. a) Definewaterturbine,whatisthe basisof selectionof a turbine?
3
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{H$¶m OmVm h¢&
b) Explainthefunctionofdrafttubefittedtoareactionturbine. 3
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c) What are the main difference between Francis and Kaplan
turbine? 6
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d) Draw a neat sketch of Pelton turbine, label different parts and
explainitsworking. 8
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7. a) What is the use ofAir-Vessel in reciprocating pump? 3
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b) Whatistheuseoffootvalveincentrifugalpump? 3
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c) Definethemodelanalysisandexplainthreetypesofsimilarities.
6
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d) Definecentrifugalpump.Explainthefunctionsofmaincomponents
ofcentrifugalpumpwiththehelpofneatsketch. 8
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8. Write short note on (any five). 20
i) Hydraulicpowerplant
ii) Impulsemomentumequation
iii) Inclinedtubemanometer
iv) Wetted perimeter
v) Hydraulicmeandepth
vi) WaterHammer
vii) Selectionofpumps
viii) Diaphragmpressuregauge.
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