Download GTU BE/B.Tech 2019 Summer 3rd Sem New 2130502 Fluid Flow Operation Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (NEW) EXAMINATION — SUMMER 2019

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Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

1. (a) Define compressible & incompressible flow. 03
   (b) Distinguish between blower and compressor. 04
   

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   (c) An oil of specific gravity 0.7 is flowing through a pipe of diameter 300 mm at the rate of 500 lit./sec. find the head loss due to friction and power requirement to maintain the flow for a length of 1000 meter. Kinematic viscosity of oil is 0.29 stock. 07
2. (a) Write the application of Mach number. 03
   (b) Define cavitation. How we can avoid cavitation. 04
   (c) Carbon tetrachloride is to flow through a smooth horizontal circular tube of ID 3 cm at a volumetric flow rate of 2 liter per second at 25 °C. Calculate the pressure loss per cm length of tube. Density & viscosity of Carbon tetrachloride are 1.54 gm/cc. and 0.87c.p. respectively. 07
   OR
   

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   (c) Calculate the power required and pressure which should be developed by a pump of 70% efficiency in order to send 60 kg/min of 98%, sulphuric acid at 25 °C from a tank at atmospheric pressure through 300 meters of 5 cm ID, steel pipe to a tank of 2 kg/cm² pressure, where the level is 3 meters above that in the lower tank. Density & viscosity of the acid may be taken as 1.8 gm/cc., and 26c.p. respectively. 07
3. (a) Define hydraulic radius. 03
   (b) Give the application of gate valve & globe valve. 04
   (c) Give the statement Bernoulli’s theorem. Write the assumptions and derive Bernoulli’s equation. 07
   OR
   

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   (a) Write the physical significance of Reynolds number. 03
   (b) Define air binding & priming. 04
   (c) Give the classification of pump. And discuss in detail. 07
4. (a) What is skin friction and form friction? 03
   (b) Define viscosity. How it varies with temperature & pressure. 04
   

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   (c) Compare Newtonian & Non-Newtonian. And discuss in details. 07
   OR
   (a) Define Schedule number & BWG. 03
   (b) Give the application of gravity decanter & centrifugal decanter. 04
   (c) What is fluidization? Discuss the types of fluidization with its principles 07

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5. (a) Define fully developed flow. 03
   (b) Distinguish between venture meter & orifice meter. 04
   (c) For laminar flow of fluid through pipe, derive the following relation for the ratio of local velocity to maximum velocity, 07
   u r
   )
   

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   Umax Tw
   OR
   (a) Define friction. 03
   (b) Define free settling and hindered settling of particle. 04
   (c) Derive Hagen — Poiseuille’s equation with its significance. 07

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