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Max. Marks: 100

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree Examination December 2020 (2019 Scheme)

Course Code: MET203
Course Name: MECHANICS OF FLUIDS

PARTA
Answer all questions. Each question carries 3 marks
Consider a soap bubble. Is the pressure inside the bubble higher or lower than the
pressure outside? Explain.
Define the resultant hydrostatic force acting on a submerged surface, and the
centre of pressure.

What does the word kinematics mean? Explain what the study of fluid kinematics
involves?

What flow property determines whether a region of flow is rotational or
irrotational? Discuss.

What is the hydraulic grade line? How does it differ from the energy grade line?

Define static, dynamic and hydrostatic pressure. Under what conditions is their
sum constant for a flow stream?

Define equivalent length for minor loss in pipe flow. How is it related to the
minor loss coefficient?

Explain how flow rate is measured with obstruction type flowmeters. Compare
orificemeters and venturimeters with respect to cost, size, head loss and accuracy.

What is a boundary layer? What causes a boundary layer to develop?
What is the primary reason for nondimensionalizing an equation?
PART ‏تا‎
‎Answer any one full question from each module. Each question carries 14 marks
Module 1

a. Consider two identical fans, one at sea level and the other on top of a high
mountain running at identical speeds. How would you compare (a) the
volume flow rates and (b) the mass flow rates of these two fans?

b. You may have noticed that dams are much thicker at the bottom. Explain
why dams are built that way?

a. Differentiate between
(i) Specific weight and Specific volume
(11) Dynamic viscosity and Kinematic viscosity
(111) २९६ fluid and Ideal fluid

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Duration: 3 Hours

Marks
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