Part - A (Answer ALL questions.) 20 x 2 = 40 Marks
Part - B
(ii) Water has a surface tension of 0.4 N/m. In a 3 mm diameter vertical tube if the liquid rises 6 mm above the liquid outside the tube, calculate the contact angle. (7)
(b) (i) Define Geometric and Kinematic similarity. (4)
(ii) A U - tube differential mercury manometer is connected between two pipes X and Y. Pipe X contains carbon tetra chloride (Sp.gr. 1.59) under a pressure of 103 kN/m2 and pipe Y contains oil (Sp.gr. 0.8) under a pressure of 172 kN/m2. Pipe X is 2.5 m above pipe Y. Mercury level in the limb connected to pipe X is 1.5 m below the centerline of pipe Y. Find the manometer reading as shown by a centimeter scale attached to it. (8)
(ii) Water flows through a horizontal conical pipe. The diameter at larger end is 1.3 m and that at smaller end is 0.7 m. The pressure head at the smaller end is 5 m of water and discharge is 3.5 m3/sec. Calculate the velocities at the two ends and pressure head at larger end. (8)
(b) (i) Explain the method of reducing skin friction drag. (4)
(ii) A medium lubricating oil of sp.gr. 0.86 is pumped through 300 m horizontal pipe of diameter 50 mm at a rate of 1.24 lit/sec. If the pressure drop is 0.2 MPa find the absolute viscosity of oil. (8)
(b) With a neat sketch explain the working principle of a Hot-film anemometer.
(b) Describe the general properties of fluidized bed.
(b) (i) Explain the various performance curves of a centrifugal pump.
(ii) Briefly explain the method of selecting a pump for a given application.