Hall Ticket No Question Paper Code: AME008
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech IV Semester End Examinations (Regular) May, 2018
Regulation: IARE R16
MECHANICS OF FLUIDS AND HYDRAULIC MACHINES
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Define the following fluid properties giving their physical units of measure: Density, Weight
density, Specific volume and Specific gravity.
Explain the working of Piezometer. The pressure intensity at a point in a fluid measures
3.942 N/cm2. Evaluate the corresponding height of fluid for
i. Water ii. Kerosene with specific gravity of 0.82 iii. Mercury with specific gravity of 13.6.
2. Differentiate between U-tube and Differential Manometer. With a neat sketch.
Explain Newton's law of Viscosity. A plate 0.025 mm distance from a fixed plate moves at
0.6 m/s velocity on application of 2 N per unit area to maintain this speed. Evaluate
the dynamic viscosity of the fluid.
UNIT II
3. Explain the terms with relevant illustrations: i. Path line ii. Steak line iii. Stream line
Water is flowing through a 5 cm diameter pipe at 29.43 N/cm2 pressure (gauge) and mean flow
velocity of 2.0 m/s. Assess the total head or total energy per unit weight at a point 5 m above
the datum line assuming density of water as 1000 kg/m3.
4. State Bernoulli's theorem. Mention the assumptions made. Explain any two important applications
of Bernoulli's theorem in engineering practice.
i. State the momentum equation for flow through a pipe bend.
ii. A 300 mm diameter pipe carries water under a head of 20 meters with a velocity of 3.5 m/s.
If the axis of the pipe turns through 45o, find the magnitude and direction of the resultant
force at the bend.
UNIT III
5. What do you understand by the terms boundary layer and boundary layer theory for flow over
a flat plate? Sketch the three different regions of flow on the flat plate indicating the growth of
boundary layer thickness.
Determine the difference in the elevations between the water surfaces in the two tanks which are
connected by a horizontal pipe of diameter 300 mm and length 400 m. The flow rate of water
through the pipe is 300 liter/s. Consider all losses and take friction factor f=0.008
Page 1 of 2
6. Explain with illustrations the following terms: i. Total Energy line ii. Darcy Weisbach Equation

Determine the thickness of the boundary layer at the trailing edge of smooth plate 4 m in length
and 1.5 m in width, when the plate is moving with a velocity of 4 m/s in stationary air medium.
Take kinematic viscosity of air as 1:5X and boundary layer thickness to be equal to
0:37 x

15
.
UNIT IV
7. Define the terms:
i. Impact of jets ii. Turbo Machinery iii. Governing of turbines.
A Pelton wheel has a mean bucket diameter of 1 m and runs at 1000 RPM with a net head of
700 m. If the side clearance angle is 150 and nozzle discharges 0.1 m3/s of water, evaluate
i. Power available at nozzle ii. Hydraulic efficiency of turbine.
8. Define the terms:
i. Cavitation ii. Surge tank iii. Water hammer
A 50 mm diameter jet of water strikes a fixed plate in such a position that the angle between
jet direction and normal to the plate is 300. If the force exerted is 1471.5 evaluate the rate of
water flow through the nozzle. Determine the work done by the plate due to jet impingement.

UNIT V
9. Explain the important parts of the Centrifugal pump with a neat sketch.
Discuss Net Positive Suction Head (NPSH) with reference to Pump design
10. Explain the working of a Reciprocating pump indicating its important parts.
Make a detailed comparison between Reciprocating Pumps and Centrifugal pumps.