C B3C114S Pages: 2

Reg. No. Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION, JULY 2017

ME200: FLUID MECHANICS AND MACHINERY (AN, AU, IE, MP, PE)
Max. Marks: 100 Duration: 3 Hours

PART A

Answer any three questions.
. a. Explain the terms dynamic viscosity and kinematic viscosity with their units. (4)

نے

ந. A 1712, 10kg flat plate slides down a 30 inclined plane over a 0.101 uniform layer

of oil, dynamic viscosity 0.05 Ns/m’. Determine the steady state velocity. (6)

2. a. Distinguish between intensity of pressure and pressure head (3)
b. How does the atmospheric pressure vary with altitude? (3)
c. Prove that the pressure at a point in a fluid at rest has the same magnitude in all

directions. (4)

3. a. Differentiate between simple manometer and differential manometer. (5)

b. The right limb of a simple U-tube manometer containing mercury was open to
atmosphere while the left limb is connected to a pipe in which a fluid of specific
gravity 0.8 is flowing. The centre of the pipe is 14 cm below the level of mercury in
the right limb. Find the pressure of fluid in the pipe, if the difference of mercury level
in the two limbs was 18 cm. (5)

4. a. Define the term ‘buoyancy’ and “ centre of buoyancy’. (3)
b. Explain the term ‘metacentre’ and ‘meta-centric height’. (3)
c. What do you understand by ‘Total pressure’ and ‘centre of pressure’? (4)

PART B
Answer any three questions.

5. a) Define the equation of continuity. (3)
b) A 30cm diameter pipe, conveying water, branches into two pipes of diameter
20cm and 15017 respectively. If the average velocity in the 30cm diameter pipe is 2.5
m/s, find the discharge in this pipe. Also determine the velocity in 15cm pipe, if the
average velocity in 20cm diameter pipe is 2m/s. (7)

6. a. Explain the phenomenon of water hammer. (5)
b. What is the difference between a laminar flow and turbulent flow? (5)

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