Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
Assignment No. 1
Properties of Fluids
Sr.
No.
Question
1 Define Dynamic Viscosity and kinematic viscosity.
Exam
S 2015
Mark s
2
2 Explain the phenomenon of capillary rise with reference to surface tension.
3 Define weight density and kinematic viscosity.
S 2015 4
W 2015 2
4 State the units of discharge and dynamic viscosity.
W 2015 2
5 Specific gravity of an oil is 0.80. Find its weight density.
W 2015 2
6 Explain surface tension and capillarity.
W 2015 4
7
8
Define Specific gravity and Specific weight.
Define surface tension & capillarity.
S2014
S2014
W2014
10
Determine surface tension of liquid in contact with air & a glass tube. If the capillary tube diameter 2mm is dipped in a liquid of specific gravity 0.8 , the liquid rises in the tube by 15mm, making an angle of contact of 25 0 with the tube.
Define Specific gravity, Specific volume and Vapour pressure
11
Define Density and Surface Tension.
12
13
Define Kinematic viscosity and Dynamic viscosity.
Define Specific gravity and Specific weight. State its SI unit.
14
15
Determine the specific gravity of fluid having viscosity 0.05 poise and kinematicviscosity as 0.035 stokes.
16
A 5mm diameter glass tube is immersed vertically in water. If the contact angle is50° find the capillary rise. Take surface tension for water as 0.074.
17 Define specific volume. State its SI unit.
18
19
Explain the phenomenon of capillary rise with reference to surface tension.
Define the following terms i) Specific Weight ii) Specific gravity iii) Pressure iv) Surface tension
W2014
Sample Paper
G Scheme
Sample Paper
G Scheme
Sample Paper
G Scheme
Sample Paper
E Scheme
Sample Paper
E Scheme
Sample Paper
E Scheme
3
2
4
2
4
4
S2011 2
S2011, W2012 4
W2011
4
4
2
4
2

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
20
21
22
Define the term i) Kinematic Viscosity ii) Dynamic Viscosity
23
2
-1
3
24 Define kinematic viscosity and atmospheric pressure.
25 Define density and specific gravity
26
Differentiate between dynamic viscosity and kimematic viscosity. State their units.
27 Explain the phenomenon surface tension and capillarity.
28
29
30
Define specific gravity of fluid and write its standard value of water.
Explain the phenomenon of ‘capillary rise’ and write its equations for capillary rise of liquid.
Explain dynamic viscosity and kinematic viscosity. write relation between them.
Define Surface Tension, give its SI unit.
31
W2011
S2012
S2012
S2012
W2012
S2013
S2013
S2013
W2013
W2013
4
2
4
4
2
2
4
4
2
4
4
2
32
Specific gravity of oil is 0.76. Calculate its density in kg/m
3 and specific weight in N/m
3
.
33
Define Kinematic Viscosity and give its SI unit.
34
Find the specific gravity of an oil whose specific weight is
7.85 kN/m
3
.
35 What is Newton’s law of viscosity?
36
Calculate specific weight and density of one liter liquid which weighs 7 N.
37 Define Dynamic Viscosity with its SI unit.
38
Determine the specific gravity of a fluid having viscosity
0.005 N-s/m
2
and kinematic viscosity 0.035 X 10
-4
m
2
/sec.
39
Define Newtonian and Non-Newtonian fluid with one example each.
The density of liquid is 3000 kg/m3. Calculate specific
40 gravity and specific weight of liquid.
41
State Newton’s law of viscosity?
42
Find the Kinematic viscosity of an oil having density 980 kg/m
3 when at a certain point in the oil, the shear stress is 0.25 N/m
2 and velocity gradient 0.3 /s
W2013
MSBTE Sample
Test Paper C
Scheme, S2010
MSBTE Sample
Theory Paper C
Scheme
MSBTE Sample
Theory Paper C
Scheme
W2008
W2008
S2009
S2009
W2009
W2009
S2010
W2010
W2010
2
2
2
2
2
4
2
2
2
2
2

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
Assignment No. 2
Fluid Pressure & Pressure measurement
Exam Sr.
No.
Question
1 Define Total Pressure and Centre of Pressure.
2 Differentiate between simple manometer and differential manometer.
S 2015
S 2015
3 Explain the concept of absolute pressure, atmospheric pressure, gauge pressure and vacuum pressure. State the relation between them.
S 2015
4 Explain the construction and working of Bourdon pressure gauge with a neat sketch.
5 Convert 25 N/cm 2 pressure in equivalent column of mercury and water.
6 A closed tank contains 0.6m of mercury, 1.6m of water,
2.7m of oil of specific gravity 0.9 and air space above the oil. If the pressure at the bottom of the tank is 4 kg/cm 2 gauge, what should be the reading of the gauge at the top of the tank?
7 State atleast two devices to measure fluid pressure.
7
Define : (i) Absolute (ii) Gauge (iii) Vacuum and (iv) atmospheric pressure.
8 Explain Inverted U-tube differential manometer.
9 Why mercury is used in manometer?
10
Write any four advantages of mechanical gauges over manometer.
11 Explain “Single Column Manometer” in brief.
12 Explain Bourdon pressure gauge with a neat sketch.
13 Explain simple differential manometer with a neat sketch.
14 Explain Total Pressure and Centre of Pressure.
S 2015
W 2015
W 2015
W 2015
W2014
W2014
W2014
W2014
S2014
S2014
S2014
Sample Paper
G Scheme
15 A circular plate of 6 m diameter is held in water in such a way that its maximum and minimum depth from surface of water is 3 m and 9 m. Determine the total pressure on the plate and the position of centre of pressure.
16 A tube manometer is used to measure pressure of oil specific gravity 0.85 flowing in a pipe line. Its left end is connected to pipe and right limb is open to atm. The centre of pipe is 100 mm below level of mercury in right limb. If the difference of mercury level in two limbs is 160 mm . Find absolute pressure in kPa. Take specific gravity of mercury =13.6.
17 Define fluid pressure intensity and pressure head.
Sample Paper
G Scheme
Sample Paper
G Scheme
18 A circular plate 1.3 m in diameter is immersed vertically in water so that centre of the plate is 2.2 m below the free
Sample Paper
G Scheme
Sample Paper
G Scheme
Marks
2
4
4
4
4
4
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4
4
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4
3
4
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2
4

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411) surface. Determine total pressure and the depth of centre of pressure.
19 Explain Bourdon pressure gauge with a neat sketch.
20 Explain concept of Absolute vacuum, Gauge pressure and
Atmospheric pressure with a neat diagram.
21
A left limb of a simple ‘U’ tube mercury manometer is connected to a pipe in which a fluid of specific gravity 0.9 is
22 flowing. The centre of the pipe is 12 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 is 20 cm.
Explain working principle of Differential manometer with neat sketch.
23 Define the terms “Center of pressure” and “Total pressure” on immersed body.
24
Draw a neat sketch of “inverted U-tube differential manometer”.
Under whatpressure conditions it can be used?
25 An Equilateral triangular plate of base 3m and altitude 3m is immersed verticallyin an oil of specific gravity 0.8. Determine total pressure and depth of center ofpressure of plate.
26 A close tank contains 0.5 m Hg and 1.5 m water, 2m of oil of specific gravity0.8and air space above the oil, if the pressure at the bottom of tank is 30 N/cm
2 gauge. What should be the reading of the gauge at the top of the tank?
27 List the Mechanical gauges for pressure measurement. Explain with a neat sketch the working of Bourdons tube pressure gauge.
28 What is meant by i) Total Pressure ii) Centre of pressure on immersed body?
Sample Paper
G Scheme
Sample Paper
G Scheme
Sample Paper
G Scheme
Sample Paper
G Scheme
Sample Paper
E Scheme
S2013
Sample Paper
E Scheme
Sample Paper
E Scheme
Sample Paper
E Scheme
Sample Paper
E Scheme
S2011
4
4
4
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2
4
4
4
8
2

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
29
In a given Fig. No. 1 the air pressure intensity at A is 1/10
N/mm
2
(absolute). What is the pressure in N/mm
2
(absolute) at
B?
Water
S2011 4
Oil of Sp. Gr. 0.9
h
1
=250 mm
h
2
=75 h3 = 150mm
Mercury
30 A circular plate of 6 m diameter is held in water in such a way that its maximum and minimum depth from surface of water is 3 m and 9 m. Determine the total pressure on the plate and the position of centre of pressure.
31 Draw a sketch of Bourdon gauge and explain how it works.
32 Explain with neat sketch working of differential manometer.
33 For a water column of height 6 m. Calculate i) Intensity of pressure (KPa) ii) mm of mercury iii) m of water iv) N/m
2
absolute.
34 Convert 10 N/cm
2 pressure in oil column of specific gravity
0.82.
35 Convert 15cm mercury column equivalent to water column.
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8
2
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36 An isosceles triangular plate base 1.2m & height 2m is immersed vertically in such a way that the apex is in the downward direction and the side of base is parallel & 38cm below free water surface level, determine total pressure.
37 Define the following term i) Vapour pressure ii) Compressibility ii Gauge pressure iv) Total pressure
W2011
W2011
4
4

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
38
39
40
41
42
43
44 What is meant absolute and atmospheric pressure ?
45 The pressure of a fluid of specific gravity 0.8 flowing in horizontal pipe line is determined with a simple U tube mercury manometer .The level of mercury surface in right limb which is open to atmosphere is 90 mm above the centre of pipe . The level of mercury in the left limb which is connected to the pipe is 60 mm below centre of the pipe . Determine absolute pressure of the fluid in the pipe in Newton’s per square meter .
46 A circular plate of 6 m diameter is held in water in such way that its maximum and minimum depth from surface of water is 3 m and 9 m . Determine the total pressure on the plate and position of center of pressure .
47 Draw a sketch of Bourdon pressure gauge and explain how it works .
48 Define pressure head . How given pressure in pascal can be converted into required liquid column .
49 For a water column of height 6 m calculate
1)Intensity of pressure (KPa)
2)mm of mercury
3)m of water
4)N/m
2
50 Define pressure. Establish a relation between pressure and pressure head
51 A simple U-tube manometer containing Hg is converted to a pipe in which a fluid of Sp. Gr. 0.8 and having vacuum pressure is flowing the other and of the manometer is open to atmosphere. Find the vacuum pressure in pipe, if the difference of Hg level in two limbs is 40 mm and the height of fluid in the left from the centre of pipe is 15 cm below.
52 Determine the total pressure on a circular plate of diameter 1.5 m which is placed vertically in water in such a way that the centre of the plate is 3 m below the free surface of water. Find the centre of pressure also.
53 Write equation for total pressure and centre of pressure of an
S2012
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411) inclined plane surface.
54 Determine the total pressure and centre of pressure on a circular plate of diameter 1.5m which is placed vertically in water in such a way that the centre of plate is 3m below the free surface of water.
(Density of water = 1000 kg/m
3
)
55 Draw a sketch of Bourdons pressure gauge and explain how it work.
56 Define absolute pressure, Gauge pressure vacuum pressure and atmospheric pressure.
57 List of various types of manometer used. How given pressure in
Pascal can be converted into required liquid column.
58 Convert 3.5 bar pressure into equivalent mercury column.
59 Draw a labeled diagram of vertical micromanometer. State the significance of reservoir used in it.
60 A circular plate 2 m diameter is submerged in water such that its greatest and smallest depths below the free water surface are 2.8 m and 1 m respectively. Find the inclination of the plate with water surface, total pressure acting on it and depth of centre of pressure.
61 State Pascal’s law of fluid pressure
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S2008,
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S2010
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62 How can a pressure be expressed in two ways? State the units.
63 A circular gate of 2 m diameter is immersed vertically in an oil of specific gravity 0.84. Such that its centre is 3 m from the surface of oil. Find the oil pressure and centre of pressure on the gate.
64 Explain Bourdon tube pressure gauge with a neat sketch.
65 State the different types of manometers and explain any one of them with figure.
66 Explain the concept of Atmospheric pressure, Gauge pressure and Absolute pressure.
67 Convert 30 cm of oil column in N/m
2
. Take specific gr. Of oil
1.2
68 A tube manometer is used to measure pressure of oil sp. gr.
0.85 flowing in a pipe line. Its left end is connected to pipe and right limb is open to atm. The centre of pipe is 100 mm below level of mercury in right limb. If difference of mercury level in two limbs is 160 mm. Find absolute pressure in KPa.
Take sp. gr. Of mercury = 13.6.
W2008
W2008
W2008
W2008
S2010
Sample
Question
Paper
S2009
S2009
4
4
4
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2
4

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
69 Draw neat labeled sketch of inverted U tube differential manometer. When it is be used,
70 The tank shown contains water under pressure. Calculate total pressure on side and bottom of tank. Take tank is 2.5 m wide perpendicular to plane of paper.
4 m
5 m
2 m
0.7
5 m
71 Define ‘Total pressure’ and ‘Centre of pressure’.
S2009
S2010
W2009
W2010
4
2
72 A 4 m X 4 m square plate is immersed in water with one of its diagonals vertical. Its centroid lies at a depth of 8 m from the free water surface. Calculate the total pressure on the plate and locate position of centre of pressure with respect to the plate centroid.
73 An open tank contains water up to a depth of 2 m and above it an oil of specific gravity 0.9 for a depth of 1 m. Find the pressure intensity: i) at the interface of two liquids ii) at the bottom of tank.
74 A circular plate of diameter 1m is immersed in water in such a way that the least depth of immersion is 0.5 m and max depth of immersion is 1 m. Find the depth of centre of pressure
75 Convert 25 bar into MPa
76 Draw a neat and labeled sketch of Inclined Micromanometer,
Write the equation for pressure head.
77 Rectangular sluice gate is situated on the vertical wall of lock. The vertical side of the sluice is (d) meters in length and depth of centroid of the area is (p) meters below the water surface. Find the centre of pressure.
78 A differential manometer is connected at points A and B of two pipes as shown in fig. no. 1 The pipe A contains a liquid of Sp. Gr. = 0.9. The pressure at A and B are 1 kg/cm
2
and
1.80 kg/cm
2 respectively. Find the difference in mercury level.
Sp. Gr. = 1.5
W2009
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W2010
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4
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2
4
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6

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
P a
= 1 kg/cm 2 3m
Sp. Gr.=0.9
2m
P b
=1.8 kg/cm
2
h
Mercury

Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
Q. No. Question
1.
State Bernoulli’s equation and state the meaning of each term used in it.
2.
Explain working principles of Pitot tube with a neat sketch?
3.
Define the following terms :- (1) Steady flow (2) Non-uniform flow (3) Laminar flow (4) Rotational flow
4.
State the laws of fluid friction for turbulent flow.
5.
Water flows through a horizontal tapered pipe with a diameter of
300 mm & 200mm at other end. If velocity of water at bigger end is 2.5 m/s , find the velocity of water at smaller end.
6.
Define Laminar flow & steady flow.
7.
State Bernoulli’s theorem.
8.
Derive the equation of actual velocity of fluid flow for pitot tube.
9.
Explain HGL & TEL related to flow through pipes.
10.
Draw a neat sketch of Venturimeter. State why the length of divergent cone is more than convergent cone ?
11.
State & explain the condition for maximum power transmission through pipe.
12.
State the laws of fluid friction for turbulent flow.
13.
State Continuity theorem.
14.
Define steady & unsteady flow with one example of each.
15.
Write any four laws of fluid friction for turbulent flow.
16.
Explain the HGL & TEL with neat sketch.
17.
Define steady flow & uniform flow.
18.
What is continuity equqtion.
19.
Derive the equation of actual discharge through venturimeter.
20.
Explain the HGL & TEL.
21.
An oil of specific gravity 0.8 is flowing through venturimeter having inlet diameter 20cm & throat diameter 10cm. The oilmercury differential manometer shows a reading of
25cm.Calculate discharge of oil through the horizontal venturimeter.Take C d
= 0.98.
22.
Explain construction & working of “Orificemeter” with neat sketch.
23.
State Bernoulli’s Theorem.
24.
Explain working principles of Pitot tube with a neat sketch?
25.
Differentiate between i) laminar flow and turbulent flow ii) steady flow and unsteady flow iii)rotational flow and irrotational flow
Year
W 2015
W 2015
W 2015
W 2015
W 2015
S 2015
S 2015
S 2015
S 2015
S 2015
S 2015
S 2015
W2014
W2014
W2014
W2014
S2014
S2014
S2014
S2014
S2014
S2014
Sample
Paper
G Scheme
Sample
Paper
G Scheme
Sample
Paper
G Scheme
Marks
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4
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
26.
Explain with neat sketch working principle of venturimeter
27.
Explain Hydraulic Gradient Line and Total Energy Line.
28.
Derive coefficient of discharge for Venturimeter
29.
Explain the working of orifice meter with a neat sketch?
30.
Define Laminar flow and Turbulent flow.
Sample
Paper
G Scheme
Sample
Paper
G Scheme
Sample
Paper
G Scheme
Sample
Paper
G Scheme
Sample
Paper
G Scheme
31.
A horizontal Venturimeter with inlet and throat diameter 30 cm and
15 cm respectively is used to measure the flow of water. The reading of differential Manometer connected to the inlet and throat is 20 cm of Hg. Determine the rate of flow. Take C d
=0.98
32.
Define “laminar flow” and “turbulent flow”.
Sample
Paper
G Scheme
Sample Paper
E Scheme
Sample Paper
E Scheme
33.
Draw a neat sketch of venturimeter. State why the length of divergent cone is made longer?
34.
A 5m long tapered pipe is inclined at an angle of 15
 with horizontal.
Diameter of the pipe at top end is 0.24 m and that at bottom end is 0.08 m. find the pressure difference between the two ends if the velocity of water at bottom end is 2 m/s.
35.
An Orifice meter with orifice diameter 15 cm is inserted in a pipe of
30cm diameter. The pressure gauge fitted upstream and downstream of the orifice meter give readings of 14.715 N/cm
2 and 9.81 N/cm
2 respectively. Find the rate of flow of water through the pipe in litres / sec. Take C d
= 0.6.
36.
State any four types of fluid flows.
37.
A Venturimeter is installed in a pipe line 30 cm diameter. The difference of pressure at entrance and throat read by mercury manometer is 5 cm, when water flows at a rate of 0.05 m
3
/sec. If the discharge co-efficient of meter is 0.96, determine the diameter of throat.
38.
State the laws of fluid friction for laminar flow. Also explain hydraulic gradient line and total energy line with sketch.
39.
Explain construction principle of working of orifice meter. Also write the equation for discharge through orificemeter and state the meaning of each term used.
40.
A pitot tube directed into a water stream having a velocity of 2.7 m/sec.
It has gauge difference of 30 mm on the water mercury manometer. Find its coefficient. Also explain construction and working of pitot tube with neat sketch.
41.
In case of Venturimeter why the length of divergent cone is more than
Sample Paper
E Scheme
Sample Paper
E Scheme
S2011
S2011
S2011,
W2012
S2011
S2011
W2011
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8
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411) that of convergent cone.
42.
List out the discharge measuring devices and draw a neat labeled diagram of Venturimeter.
43.
Define the following term i) Uniform flow ii) Steady flow iii) Turbulent flow iv) Rotational flow
44.
State the Bernoulli’s theorem and give the assumption made while deriving it.
45.
If the pitot tube shows 15.5 cm of water determine the velocity of water.
If area of flow is 5.88 cm
2
determine the discharge of water in lit/sec.
46.
A Venturimeter having throat diameter 5.3 cm is provided on a pipe of
10 cm diameter. If oil of specific gravity 0.85 is flowing in upward direction, determine the venturei head and the discharge if the manometer shows 12.80 cm of mercury deflection. If the vertical distance between inlet and throat is 22 cm. Determine the actual head of
Venturimeter.
Assume C d
= 0.65
47.
Define 1) Stream-line flow ii) Uniform flow
48.
A venturimeter has an area ratio 9 to 1, the largest diameter being 300 mm. During the flow, the recorded pressure head in the large section is
6.6 meters and that at the throat 4.25 metres. If the metre coefficient (C)
= 0.99, compute the discharge through the metre.
49.
What is pitot tube? Explain with neat sketch.
50.
State continuity equation
51.
A pitot tube in a pipe in which air is flowing is connected to a monometer containing water. If the difference in water levels in the manometer is 87.5 mm, what is the velocity of flow in the pipe assuming a tube coefficient as 0.99
52.
State Bernoulli’s theorm. Explain the significance of each term. What is its applicability? State its four limitations.
53.
Explain with neat sketch working of venturimetr.
54.
Define steady flow and turbulent flow.
55.
Define uniform and nominal flow
56.
A horizontal venturimeter with inlet and throat diameters 30cm and 15 cm respectively is used to measure the flow of water the reading of differential manometer connected to the inlet and the throat is 20 cm of hg .determine the rate of flow. Take cd=0.98
57.
Find the velocity of flow of an oil through a pipe ,when the difference of mercury level in differencial u-tube manometer connected to the tapping of the piyote tube is 100 mm . take coefficient of pitote tube 0.98 and sp . gravity of oil=0.8
58.
State Bernoulli’s theorem.
59.
A venturimeter connected in a pipe carrying water . the diameter of pipe is 250mm the difference of levels between the throat and inlet section is
45mm , when the flow rate 0.05m^3/sec .calculate the diameter of throat
. take Cd=0.96.
60.
Explain Hydraulic Gradient line (HGL) and total gradient line (TGL).
W2011
W2011
W2011
W2011
W2011
S2012
S2012
S2012
W2012
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S2013
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S2013
W2013
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
State law’s of fluid friction laminar &turbulent flow.
61.
What are the hydraulic coefficient ?name them . explain working principle of pitot tube
62.
Explain working principle of orificemeter with a neat sketch &define vena –contra in orifice.
63.
State Bernoulli’s theorem. Write Bernoulli’s theorem in energy and head form.
64.
A multistoried building is 380 m above the street. If the pressure of
170 KPa is required in a water pipe line at the top of the building.
What is the pressure at the basement of the building 9 m below street?
65.
Draw a neat sketch of venturimeter. State why the length of divergent cone is made larger.
W2013
W2013
S2008
S2008
S2008
Sample
Question
Paper
66.
A 25 cm diameter pipe carries oil of specific gravity 0.9 at a velocity of 3 m/s. At another section the diameter is 20 cm. Find velocity at this section and mass rate flow of oil.
67.
Explain the total energy of a liquid particle in motion.
68.
Draw the diagram of venturimeter and explain its use. Also write the equation for discharge.
69.
Write the construction and working of a Pitot tube.
70.
Derive the equation for discharge through an Orifice meter.
71.
A venturimeter has an area ratio 9 : 1. The larger diameter being 300 mm. During the flow, the recorded pressure is the large section is 6.5 m and that at the throat is 4.25 m. If the meter coefficient C = 0.99.
Calculate the discharge through the meter.
72.
Define steady flow with an example.
73.
State Bernoulli’s theorem. Explain how it can be applied to Pitot tube by using mathematical equation.
74.
An orifice meter with orifice diameter 15 cm is inserted in a pipe of
30 cm diameter. The pressure difference measured by mercury oil differential manometer is 50 cm of Hg. Find rate of flow of oil sp. gr.
0.9. Take C d
= 0.64
75.
Define compressible and incompressible flow. Water flows down an inclined tapered pipe 45 m long at slope of 1 : 10. The areas at upper and lower ends of pipe are 8 m
2
and 3 m
2
resp. If velocity at lower end is 4.5 m/s and pressure at upper end is 100 KPa, calculate pressure at lower end and rate of flow.
76.
State continuity equation and meaning of each term, for incompressible flow. Explain working principle of venturimeter.
77.
Explain the principle of working of Pitot tube with neat sketch
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78.
A 30 cm X 15 cm venturimeter is inserted in a vertical pipe carrying water flowing in the upward direction. A differential mercury manometer connected to the inlet and throat gives a reading of 20 cm.
Find the discharge. Take C d
= 0.98
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
79.
Define Rotational and Irrotational flows. Define rate of flow with its unit in SI system.
80.
Define uniform and non uniform flow.
81.
State Bernoullis’s theorem. Explain meaning of each term in it.
82.
A horizontal venturimeter 160 X 80 mm used to measure flow of an oil specific gravity 0.3 . Determine deflection of oil mercury gauge if discharge of oil is 50 lit/sec. Take C d
= 1
83.
A pipe through which water is flowing is having diameters 40 cm and
20 cm at section 1 and 2 respectively. The velocity of water at section
1 is given 5 m/s. Find the velocity head at sections 1 and 2 and also rate of discharge
84.
Draw a neat sketch of venturimeter. Define venturi head.
85.
Define the following flow i) Steady flow ii) Non-uniform flow iii)
Rotational flow iv) Laminer flow.
86.
State Bernoulli’s theorem. Write the assumptions made in it.
87.
Find the total energy of flowing water from the following data in KJ
Diameter of pipe – 1200mm
Flow rate – 360 lps
Pressure - 3 bar
Location of pipe – 3000 mm from ground level.
88.
Define “laminar flow” and “turbulent flow”
W2009
S2010
S2010
S2010
W2010
W2010
W2010
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W2010
Sample
Question
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89.
A 5m long tapered pipe is inclined at an angle of 15 0 with horizontal.
Diameter of the pipe at top end is 0.24m and that at bottom end is
0.08m. Find the pressure difference between the two ends if the velocity of water at bottom end is 2 m/s.
90.
An orifice meter with orifice diameter 15 cm is inserted in a pipe of
30cm diameter. The pressure gauge fitted upstream and downstream of the orifice meter gives reading of 14.715 N/cm 2 and 9.81 N/cm 2 respectively. Find the rate of flow of water through the pipe in liters/sec. Take Cd – 0.6
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
Question Sr.
No.
1 Classify the turbines according to :- (i) Type of energy at inlet (ii) Direction of flow through runner
2 State atleast four points of comparison between Pelton wheel and Francis turbine.
3 State the different types of draft tubes. Explain any one with neat sketch.
4 A pelton wheel working under a head of 50 meters develops 8
× 10 3 watts power at 240 rpm. Calculate the diameter of jet if the overall efficiency is 78 %. (Assume Cv = 0.98).
5 Explain the effect of cavitation in turbine and write methods to prevent it.
6 Write the formulae for hydraulic efficiency and mechanical efficiency of an impulse turbine. State the meaning of each term.
7 Explain construction and working of Kaplan turbine.
8 State the advantages and limitations of hydroelectric power plant.
9
State the principle of reaction turbine.
10 Compare impulse turbine with reaction turbine
A Francis turbine operating under a head of 60 m runs at
11
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With neat sketch explain construction and working of Pelton
A jet of water strikes on series of cup shaped vanes which
What is the function of draft tube in reaction turbine? State
14
15 Explain general layout of Hydroelectric power plant.
Classify the hydraulic turbine.
17`
Exam
W 2015
W 2015
W 2015
W 2015
W 2015
W 2015
W 2015
W 2015
S 2015
S 2015
S 2015
S 2015
S 2015
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S 2015
S2014
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411)
18
A Pelton wheel is having a mean bucket diameter of 1m and running at 1000 rpm. A net head on pelton wheel is 700m.If the side clearance angle (Φ) is 15 0 and discharge through nozzle is 0.1 m 3 /s. Find (i) Power available at nozzle
(ii) Hydraulic efficiency of nozzle.
19 Explain construction and working of Kaplan turbine.
20
What is draft tube? State the types of draft tube. Explain any one in detail.
21 Define cavitation and separation.
22 Differentiate between Francis and Kaplan turbine.
23 List any four commonly used draft tubes.
24 Compare impulse with reaction turbine .
25 Classify hydraulic turbines with examples.
Draw inlet & outlet velocity triangles for Francis turbine &
26 give the name of each term used.
27 Explain the working of Kaplan turbine.
28
Explain the function of spear and breaking jet in pelton turbine.
Classify water turbines with an example of each.
29
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W2014
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W2014
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Explain water hammer. How it is minimized?
A Pelton wheel turbine is to operate under a head of 42 m at
430 r.p.m. If the discharge is 11.5 m3/s and turbine efficiency is 90%, calculate power generated by the turbine.
Explain the need of draft tube in reaction turbine.
Draw a neat labeled sketch of Pelton turbine
List the types of draft tubes.
Classify hydraulic turbines and give application of each.
Explain with a neat sketch the layout of a hydroelectric power plant.
37 Explain the working of Francis turbine with a neat sketch
W2014
Sample
Paper
G Scheme
Sample
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G Scheme
Sample
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G Scheme
Sample
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G Scheme
Sample
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G Scheme
Sample
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G Scheme
Sample
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G Scheme
Sample
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G Scheme
G Scheme
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Year : SYME (2015-16)
State different types of draft tubes for reaction turbine.
Distinguish between impulse turbine and reaction turbine on the basis of principles of working, pressure head, discharge and application.
A pelton wheel operates under a head of 300 m with a speed ratio 0.5. The buckets are bent backwards by 300. Determine the power developed per unit weight of water flow.
With the help of neat sketch explain the construction and working of Kaplan turbine.
Sub: Fluid Mechanics & Machinery (17411)
Define cavitations in turbines.
What are different types of draft tubes. Explain any one with neat sketch.
A pelton wheel 2.5 m diameter operates under the following conditions.
Net available head = 300 m, speed = 300 rmp
Coefficient of velocity of jet = 0.98
Blade friction coefficient = 0.95, Blade angle = 1650
Diameter of the jet = 20 cm, Mechanical efficiency = 0.95
Determine: i) Power developed iii) Hydraulic efficiency iv) Specific speed.
Compare Kaplan turbine and Fransis turbine.
Draw the inlet and outlet velocity triangle for the buckets in
Pelton wheel with the meaning of the terms.
Explain with a neat sketch Governing of a Pelton Wheel.
Why draft tube is provided in case of a Reaction Turbine. Sketch elbow type circular draft tube.
Define the term ‘Specific speed’ in case of a turbine. If the specific speed of a turbine is 68 rpm, determine the type of a turbine.
What is the difference between Impulse Turbine and Reaction
Turbine give atleast eight points.
Compare Impulse turbine and Reaction Turbine
State necessity of draft tube in turbines. Explain any one with neat sketch.
A pelton wheel turbine is to operate under a head of 25 m at 200 r.p.m. If the discharge is 9 m3/s and turbine efficiency is 900 %, calculate power generated by the turbine, specific speed of the turbine and performance of turbine under a head of 20 m. Also state the type of turbine.
Draw a layout of Hydro- electric power plant and write function
Sample
Paper
E Scheme
Sample
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E Scheme
Sample
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E Scheme
Sample
Paper
E Scheme,
W2012
S2011
S2011
S2011
S2011
W2011
W2011
W2011
W2011
W2011
S2012
S2012
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S2012
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411) of its major components.
How are hydraulic turbines classified according to the action of water?
A Fransis turbine produces 3160 kW under a head of 144 m at an overall efficiency of 86%. It rotates at 1000 rpm. Taking speed ratio as 0.9 and flow ratio as 0.3 Find the guide blade angle, vane angle at inlet, diameter of runner and width of the runner at inlet.
Assume radial discharge and hydraulic efficiency of 9%
State principle of working of Impulse turbine
What is cavitation in turbines
Explain with a neat sketch, the construction and working of
Pelton wheel.
W2012
W2012
S2013
S2013
W2012,
S2013,
W2013
What is the function of Draft Tube? Expalin with neat sketches, the various types of draft tubes.
A Pelton wheel is supplied with water under a head of 35 m at the rate of 40.5 kilo litre/min. The bucket deflects the jet through an angle of 1600 and the mean bucket speed is 13 m/s. Calculate the power and hydraulic efficiency of the turbine.
A pelton wheel working under a head of 50 m develops 80 KW at 230 rpm. Calculate the diameter of jet if the overall efficiency is 78 %. Assume Cv = 0.98
S2013
S2013
State the function of draft tube in reaction turbine.
The following data is given for a Fransis turbine
Net head = 70 m, speed = 700 rpm, ηoverall = 85 %
Ηhydraulic = 92 %, flow ratio = 0.22, Breadth ratio = 0.1
Outer diameter of runner = 2 X Inner diameter of runner
The thickness of vanes occupy 6% of circumferential area of runner. Velocity of flow is constant at inlet.
Outer discharge is radial at outlet.
Determine:
W2013
W2013 i) Rate of flow ii) Guide blade angle iii) Inner and outer diameter of runner. iv) Runner vane angle at inlet.
Give selection criteria for a Turbine at a particular location/place. W2013
S2008
Draw outlet velocity triangles for slow, medium and fast runner of a pelton wheel with usual notations.
State the function of nozzle in a Pelton turbine.
Draw a layout of a hydro-electric power plant and explain.
A pelton wheel working under a head of 500 meters, produces
13000 kW at 430 rpm. If the efficiency of the wheel is 85 % determine i) the discharge of turbine ii) diameter of wheel and
S2008
W2008
W2008
W2008
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Year : SYME (2015-16) Sub: Fluid Mechanics & Machinery (17411) iii) diameter of nozzle
Differentiate between Impulse Turbine and Reaction Turbine.
Explain the construction and working of a Kaplan Turbine.
Classify turbines according to direction of flow.
Two jet strike the buckets of pelton turbine which is having shaft power as 15500 kW. The diameter of each jet is 200 mm. If net available head on the turbine is 400 mm. Find overall eff. Of turbine. Take Cv = 1.0
State name of turbine you select for.

High speed and minimum discharge

Minimum discharge and high head

Moderate discharge and head

Max. discharge and low head
A pelton wheel having semi circular buckets is 1 m in dia.
Pressure head at nozzle when it is closed is 15 bar. The discharge when nozzle is open is 3.5 m3/min. If speed is 600 rpm.
Calculate power developed and hydraulic efficiency. Take Cv =
0,98, ηo = 85 %
State the types of draft tubes.
Draw a neat sketch of Pelton wheel showing all important components. Give complete classification of ‘Pelton wheel’.
State the shape of bucket.
An inward flow reaction turbine has external and internal diameters as 1 m and 0.5 m respectively. The velocity of flow through the runner is constant and is equal to 1.5 m/s. Determine: i) Discharge through the runner. ii) Width of the turbine at outlet if the width of the turbine at inlet = 200 mm.
A pelton wheel is having a mean bucket diameter of 1 m and is running at 1000 r.p.m. The net head on the Pelton wheel is 700 m. If jet gets deflected through an angle of 1650 and discharge through nozzle is 0.1 m3/s. Find: i) Power available at the nozzle and ii) Hydraulic efficiency of the turbine
W2008
W2008
S2009
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S2009
S2009
W2009
W2009
W2009
W2009
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