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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Third Semester B.Tech Degree (S,FE) Examination December 2020 (2015 Scheme)

Course Code: CE203
Course Name: FLUID MECHANICS - I
PARTA
Answer any two full questions, each carries 15 marks
A simple U tube manometer is used to measure the vacuum pressure of a liquid
of specific gravity 0.85 flowing through a pipe. One end of the manometer is
connected to the centre of the pipe and other end is open to atmosphere. The
difference in mercury level in the two limbs is 30 cm and height of the liquid in
the limb connected to pipe is 20 cm from the centre of the pipe. Determine the
pressure in the pipe.
A circular annular area of 2 m outer diameter and 1 m inner diameter is
immersed vertically in water with the center of the area at 3 m below the water
surface. Determine the force exerted on one side of the area and the location of
the centre of pressure.
Differentiate between absolute and gauge pressure.
Derive the continuity equation in cartesian coordinates for a three-dimensional
flow.
For the velocity components in a fluid flow given by u = 2xy and v = क
×2 , show that flow is possible. Obtain the relevant stream function.
Differentiate between rotational flow and irrotational flow.
Differentiate between convective and local acceleration.
Explain the conditions of equilibrium for submerged bodies with neat sketches.
A ship 63 m long and 9 m wide displaces 16000 KN of water. A weight of 200
KN is displaced across the deck through a distance of 5.4 m and the ship is tilted
through 5°. The moment of inertia of the ship about the fore - and - aft axis is
75% of the circumscribing rectangle. The centre of buoyancy is 2.1 m below
the water surface. Determine the metacentric height and the position of the

centre of gravity of the ship. Take specific weight of seawater as 10.25 பியட்‌.

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Duration: 3 Hours

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