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PageNo .. 1 I NEW SCHEME I ME45USN I.__.___.___,___,__.._-L-_,_--L-..L.-J

Fourth Semester B.E. Degree Examination, July/August 2005MEIIP/AUIIM!MAFluid Mechanics

Time: 3 hrs.l IMax .Marks 100Note: 1. Answer any FIVE full quest ions.2. Answer should be precise and to the point.

1. (a) Dl'fme a fluid and explain 1ts followmg properttes.i) Surface tensionii) Viscocityiii) Vapour pressureiv l Bulk modulus

(b) Clearly distinguish betweeni) Absolute p r e s ~ u r e ti) Gauge pressureiii) Gauge vacuum.

((0 Mnrks)

(c) Two ho1izontal plates are placed 1.25 ems apart and the intermediate Rpare 1sftlled with an oil viscocity 11 poise. Cnlculnte the sh!'ar stress in thr oil if theupper plate is moved wtth a veloc1ty of 2.5m/s. IHinrkst2. (al State an d prove Pascal's law

(bl Drnve an expression for the total prl'il.sure for1e and the depth of renlrl' ofpcssure for an inclined surface o-ubrnI!') Define rentrl' of Buyancy and .l\l!'tacentre for a floallng body(d) Measurements of pressure ly. Calculnte tht> hetght of the mountain tf air hasa >ll>ecific weight of 1.22k[l/mt3 1 ~ l n r k s 1

3. !al Clearly explain how Motacentric-he1ghL is dt'lermineJ f'Xpc;mcntally,(6 ~ h t . r k . s ~

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Page No.. 2 ME45l11 .-\ lrJangular p h . t ~ ol 2mt base and heaght of 3 m l is immersed m water, with

it$ plane making an angle of t.i011 with frN water surface as shown Determinethe hydrostallt" foTCI' ;md the tlPJJ1 h uf c!'ntre of pressure when the ap!.'x 1s 5mls below the walel' ~ w - f a c e

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1 r . ~ toquntwn Clfi:CJntinuit",. for an iclP;tl fnctlonli'SS Outd tKMarlcoltfl Water Do\\ i n ~ through a jlipc of 65mm ch:unct!'r under a 1r.1uge PfCSure of:!HOI\' p., and a me:m \'flo6ty of l.Sml"< su Dctennme th e total h1ad if th!'Jllpt is i mta above the dHtum lme, ncgiC'f't.Jng- friction c: Marl