EXAMINATION BRANCH
QUESTION BANK
Name of the branch: MECHANICAL
Year & Sem: 2-2
Name of the subject: MECHANICS OF FLUIDS AND HYDRAULIC MACHINERY
Name of the faculty, Designation & Mobile number: P.Anitha ,ASSIT. PROF, 7660872442
Date of Examination:
Academic Year: 2016-17
NOTE: All the faculty requested to use Question Style - Calibri and Size - 12
UNIT-I
S.N0
1
2
3
4
5
6
7
8
9
10
QUESTION
APPEARED IN
(R05,R07,
R09, R13)
MARKS
Assigned
R07
08
Discuss the influence of the following fluid properties on fluid motion
1) Viscosity 2)Specific gravity 3)Surface tension
State and prove Newton’s law of viscosity?
R09
08
Discuss the factors effecting to cause the viscosity
R09
06
Explain bourdon tube pressure gauge and Diaphragm gauge?
R07
10
Describe with the help of neat sketches different types of manometers
R05
10
Differentiate between simple manometers and differential manometers
R05
06
How does vapour pressure affect fluid flow?
A vertical gap 2.2 cm wide of infinite extent contains a fluid of viscosity
2N/cm2 and specific gravity 0.9.A metallic plate 1.2cm×1.2cm×0.2cm is to
be lifted up with a constant velocity of 0.15m/sec, through the gap . If the
plate is in the middle of the gap, Find the force required .The weight of the
plate is 40N.
R07
06
R09
10
R09
08
R07
08
A cylinder of 0.3m diameter rotates in annular sleeve of 0.31m internal diameter
.Both the cylinders are 0.3m long .Find the viscosity of the liquid which fills the
space between the cylinders if a torque of 098N.m is required to cylinders an
angular velocity of 2𝜋rad/sec.
Obtain an expression for capillary rise of liquid?
11
Define surface tension .explain surface tension on a hollow bubble
R07
08
R09
08
R07
08
R09
08
R09
06
APPEARED IN
(R05,R07,
R09, R13)
MARKS
Assigned
12
13
14
15
UNIT-II
S.N0
1
2
3
4
QUESTION
Explain the terms
I)stream line 2)Path line 3)Streak line
R07
R09
Briefly explain the classification of flows?
08
08
R07
Derive continuity equation for three dimensional flow?
Derive Bernoulli’s equation along stream line and state the assumptions
R09
10
10
5
6
7
and limitations while deriving it?
Define the terms
1)velocity potential function 2)stream function
Explain various practical applications of Bernoulli’s equation
State and explain impulse momentum equation
R07
08
R07
08
R09
08
R07
12
R09
08
45 0
8
9
10
11
12
13
14
15
Water is flowing in a 300mm pipe line fitted with
a bend in the vertical
plane. The diameter at the out let of the bend is 150mm .the pipe axis at
the inlet is horizontal and the out let is 105m above the inlet .If the flow
through the bend is 0.4m3/sec and a head –loss of 0.5m occurs in the bend
calculate the magnitude and direction of the resultant force the bend
support must with stand .the volume of the bend is 0.075m3 and the
pressure at the inlet is 300KN/m2.
Water is flowing through a pipe having diameters 30cm and 15cm at the
bottom and upper end respectively. The intensity of pressure at the end is
29.43N/cm2 and the pressure at upper end is 14.715N/cm2.determine the
difference in datum head if the rate of flow through pipe is 50lit/sec.
The water is flowing through a taper pipe of length 100m having diameters
500mm at the upper end and 300mm at the lower end, at the rate of
50lit/sec .The pipe has a slope of 1 in 25.Find the pressure at the lower end
if the pressure at the higher level is 196.2kN/m2.
The stream function for two dimensional flow is given by
ψ=xy.
Determine the velocity at the value of velocity potential at the point (4,5).
The velocity vector in a fluid flow is given v= 4x3i-10x2yj+2tk.Find the
velocity and acceleration of a fluid particle at (2,1,3) at time t=1.
A 30 cm diameter pipe, conveying water, branches in to two pipes of
diameters 20cm and 15cm respectively. If the average velocity in the 30cm
diameter pipe is 2.5 meter/sec. Find the discharge in this pipe. Also
determine the velocity in 15cm pipe, if the average velocity in 20cm
diameter pipe is 2 meter/sec.
08
R07
08
R09
10
R07
12
R09
12
R07
10