MODEL PAPER 1
a)Explain
the piezometer briefly with a neat sketch?
b)Explain
briefly the mechanical gauges?
c)Define
study and non-study, uniform and non-uniformed flows?
d)Derive
the continuity equation?
e)Explain
briefly the term boundary layer with a neat sketch?
f)Explain
what is laminar sub layer?
g)What is
hydraulic turbine?
h)What
are the functions of draft tube?
i)What is
a pump and how pumps are classified?
j)Describe
the principle of working of centrifugal pump?
PART-B Marks:
50
1)A. Explain about U-Tube
differential manometer?
b. A
cylinder of 0.12m radius rotates concentrically inside a fixed cylinder of
0.13m radius.
Both the
cylinders are 0.3m long. Determined the viscosity of fluid which fills the
space
between
the cylinders, if a torque of 0.88Nm is required to maintain an ang
ular
velocity of
2π
rad/sec.
OR
2)A
pipeline is 15 cm in diameter and is at an elevation of 100 m at section A. At
section B, it is
at an
elevation of 107.0 m and has a diameter of 30 cm. When a discharge of 50
lit/sec of
water is
passed through this pipe, the pressure at section A is observed to be 30KPa.
The
energy
loss in the pipe is 2 m. calculate the pressure at B when the flow is (i) from
A to B,
(ii) from
B to A.
3)a)
Explain how the following flow problems are analyzed.
i) Series
pipe connection
ii)
Parallel pipe connection iii) Equivalent pipe connection.
b) Water
flows through a 10cm diameter, 30m long pipe at a rate of 1400 rpm. What percent
of head
would be gained by replacing the central one third length of pipe by another
pipe of 20cm
diameter. Assume that the changes in section are abrupt and f = 0.008 for all pipes.
Neglect
entrance and exit losses but consider major loss and losses due to sudden contraction
and
sudden expansion.
OR
4) a)
State and derive the momentum equation.
b)
Discuss path line, stream line, streak line and stream tube with neat sketches.
5)Water
flows through a 10cm diameter, 30m long pipe at a rate of 1400 rpm. What
percent
of head
would be gained by replacing the central o
ne third
length of pipe by another pipe of
20cm
diameter. Assume that the changes in section are abrupt and f = 0.008 for all
pipes.
Neglect
entrance and exit losses but consider major loss and losses due to sudden
contraction
and sudden expansion.
OR
6)Derive
an expression for finding the major loss when the fluid flows through a pipe.
Also
give the
formulae for various minor losses.
A 300mm x
150mm inclined venture meter carries water. The reading recorded by an
inverse U-tube
manometer is 400mm. The specific gravity of the manometric fluid is 0.8. If
the loss
between the inlet and throat is 0.3 times the kinetic head of the pipe,
determine the
discharge
and coefficient of discharge
7) A jet
of water 120 mm in dia
meter and
moving with a velocity of 25m/sec strikes normally
on a flat
plate. Determine the power developed and the efficiency of the system when i)
The
plate is
stationary ii) The plate is moving with a velocity of 8m/sec in the direction
of the
jet. And
iii).The
plate is moving with a velocity of 8m/sec towards the jet.
OR
8)Derive
an expression for the force exerted by a jet striking the curved plate at one
end
tangentially
when the plate is symmetrical.
9)Define
Specific speed of a pump. Derive an expression for calculating the same. Give
the
classification
of pumps based on specific speed
OR
10)A
centrifugal pump running at 1000r.p.m delivers water against a head of
14.5m.The vanes are curved
at an
angle of 30 with its periphery. If the impeller diameter at the outlet is 30
cm and
outlet width is 5 cm, determine the discharge. Take the Manometric efficiency
as 95%.
MODEL PAPER 2
1.Define
gauge pressure and absolute pressure?
2.Explain
about viscosity and kinematic viscosity?
3.What is
stream line body and bluff body?
4.What
are the assumptions made in derivation of Bernoulli’s theorem?
5.Differentiate
between laminar and turbulent boundary layer?
6.What
are minor losses in pipes?
7.State
the advantagesof Kaplan turbine over Francis turbine?
8.What is
function of governor in a turbine?
9.List
the main components of the centrifugal pump and explain them with neat sketch?
10.What
is air vessel and what are its uses?
Part-B
1)Define
Surface tension. Explain how does it varies with variation in temperature in
fluids
and
explain how to determine the pressure intensity within a droplet and jet of
liquid in
excess of
the outside pressure intensity.
OR
2)A pipe
having a length of 6 kmand diameter 0.7mconnects two reservoirs A and B, the
difference
between their water levels is 30m. Halfway along the pipe there is a branch
through
which water can be supplied to a third reservoir C. Taking f=0.024 determine
the rate of flow of reservoir
B when on
water is discharged to reservoir C.
3)i)
State and derive the momentum equation.
ii)Discuss
path
line, stream line, streak line and stream tube with neat sketches.
OR
4)a.
Explain & derive Bernoulli’s theorem and also its assumptions?
5)Show
that the discharge of water through a sharp edged orifice shall be increased by
about
38% if a
short cylindrical mouthpiece of the same diameter is fitted in to it on the
outside of
the tank.
Take coefficient of contraction as 0.62 and neglect the friction.
6)Derive
an expression for finding the discharge through an orifice.
OR
7)Show
that the efficiency of a free jet striking normally a series of flat plates
mounted on the
periphery
of a wheel never exceeds 50%.
OR
8)
i) Write
a brief note on classification of turbines.
ii) A
pelton wheel has to be designed for the following data: power to be developed
=6000
kW, Net
head available = 400 m, speed = 550 rpm, Ratio of jet diameter to the wheel
diameter
= 1/10 and overall efficiency = 85%. Find the number of jets, diameter of jet,
diameter
of the wheel and quantity of water required.
9)i) What
is meant by Negative Slip? When does this occurs?
ii) A
double acting reciprocating pump, running at 40 rpm is discharging 1.0 mof
water per
minute.
The pump has a stroke of 400mm. The diameter of the piston is 200mm. The
delivery
and the suction heads are 20m and 5m respectively. Find the slip of the pump
and
power
required to drive the pump.
OR
10)Explain
the classification of centrifugal pumps. Explain the working of a centrifugal
pump?
MODEL PAPER 3
a)What is
surface tension?
b)Convert
a pressure head of 100m water to kerosene of specific gravity 0.81
c)Explain
stream line and path line?
d)Write
the Euler’s and Bernoulli’s equations?
e)Write
the methods of preventing the separation of boundary layer?
f)Explain
about pitot tube?
g)Explain
the force exerted on a stationary flat plate held normal to the jet?
h)What
are the main parts of Francis turbine?
i)Write
the losses in centrifugal pump?
j)Define
the negative slip of a reciprocating pump?
PART-B
Marks: 50
1)a)
Define the following
i)
Atmospheric pressure ii) Gauge pressure iii) Vacuum pressure iv) Absolute
pressure
b) What
are manometers and how are they classified? What is differential manometer?
OR
2)What is
vapour pressure and cavitations? How does cavitations’ occurs and what it’s effects?
3)Classify
the flows and explain them?
OR
4)Derive continuity
equation in three dimensional flow?
5)What is
boundary layer and explain about laminar and turbulent boundary layers?
OR
6)What is
separation of boundary layer and what are the methods of preventing separation
of
boundary layer?
7)a) Show
that the efficiency of a free jet striking normally a series of flat plates
mounted
on the
periphery of a wheel never exceed 50%.
OR
8)Give
the classification of turbines and explain each one in detail?
9)Explain
the working of a reciprocating pump in detail?
OR
10)What
are the performance characteristic curves of centrifugal pump and explain them?
MODEL PAPER 4
a)What
are the physical properties of the fluids?
b)Explain
briefly about diaphragm gauge?
c)What
are rotational and irrotational flows?
d)Explain
about hydraulic gradient line?
e)What is
meant by boundary layer thickness?
f)What is
cavitation? How can it be avoided in reaction turbines?
g)Draw
the velocity diagram for jet striking a moving curved vane tangentially at one
tip and leaving at other?
h)What is
the function of surge tank?
i)Define
indicator diagram with neat sketch?
j)What
are the efficiencies of centrifugal pump?
PART-BMarks: 50
1) A) What
are the various types of fluids and define them?
b) How
does viscosity of liquids and gasses vary with temperature?
OR
2)What are
deferential manometers and explain them?
3)What
are body forces, surface forces and line forces? explain them.
OR
4)What is
momentum equation? Derive an expression for force exerted by
a flowing
fluid on a pipe bend?
5)Define
Drag and Lift? Derive an expression for Drag force and Lift force?
OR
6)Drive
DARCY WEISBACK equations for frictional losses in pipe flow?
7)Derive
an expression for work done on a series of radial curved vanes?
OR
8)Explain
various types of characteristic curves of hydraulic turbine?
9) a)
What is slip of a reciprocating pump and what is negative slip?
b) What
is the indicator diagram of a reciprocating pump and explain?
OR’
10)a)
Explain the term NPSH and how it is useful?
b) Derive
an expression for specific speed of a centrifugal pump?
MODEL PAPER 5
Marks: 25
a)Explain
the piezometer briefly with a neat sketch?
b)Explain
briefly the mechanical gauges?
c)Define
study and non-study, uniform and non-uniformed flows?
d)What is
stream line body andbluff body?
e)What
are the assumptions made in derivation of Bernoulli’s theorem?
f)Differentiate
between laminar and turbulent boundary layer?
g)Explain
the force exerted on a stationary flat plate held normal to the jet?
h)What
are the main parts of Francis turbine?
i)Write
the losses in centrifugal pump?
j)Define
the negative slip of a reciprocating pump?
k)
PART-B
1.
a) Define
surface tension and derive the equation for pressure intensity inside liquid
jet.
b)
Explain the manometer that can be used for very precise measurement of small
pressure
difference
between two points with a neat sketch?
OR
2. a)
Define Viscosity. Derive Newton’s equation of viscosity. Explain th
e
variation of shear stress with velocity gradient in the case of various fluids.
I
b)
Calculate the capillary rise in a glass tube of 3.2 mm diameter when immersed
vertically in
mercury.
Take surface tension for mercury is 0.073 N/m.
3 .definestream
line, path line , streak line and stream tube.
OR
4.Derive
the equation of continuity for 3-Dimensional flows.
5. What
are minor losses in pipes? Derive an expression loss of head due to sudden
enlargement of pipe.
OR
6.
Explain with a neat sketch the Hydraulic gradient line and Total energy line.
7. Derive
the condition for max. power transmitted through the nozzle.
OR
8. Derive
the condition for diameter of nozzle for max. power transmission.
9. What
is geometric similarity? Explain about surge tank and Water hammer.
OR
10. List
main component parts of a centrifugal pump and explain them briefly with a neat
sketch
Skyup’s Media Is Not Responsible If These Questions Didn’t
Appear In Examination These Are Only The Questions Prepared By Experienced
Faculty As Per Their Guess Only
0 comments:
Post a Comment