Code No: 23024

RR

Set No - 1

in

II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICS OF FLUIDS Aeronautical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) what do you mean by minor and major losses in pipe flows .Under what conditions does a minor losses become a major loss?

or

ld .

(b) Two reservoirs are connected by a pipe line of diameter 60cm and length 4000m. The difference of water level in the reservoir is 20m. At a distance of 1000m from the upper reservoir, a small pipe is connected to the pipe line. The water can be taken from the small pipe. Find the discharge to the lower reservoir if (i) No water is taken from the small pipe and (ii) 100 lit/sec of water is taken from small pipe [8+8] 2. (a) A 150 mm x 75 mm Venturimeter with Cd = 0.98 is to be replaced by an orifice meter having a value of Cd = 0.6. If both the meters are to give the same differential mercury manometer reading for a discharge of 100 lps and the inlet dia. to remain 150 mm, what should be the diameter of orifice.

uW

(b) What is the necessity of ventilation of weirs.

[8+8]

3. (a) What is meant by Mach number (M), Zone of action and Zone of Silence? (b) Derive an expression for flow of compressible fluid through venturimeter. [8+8] 4. (a) What factors account for the loss of energy in laminar flow? How does the energy loss vary with velocity of flow. [8+8]

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(b) Derive the expression for Reynolds number.

5. (a) State the momentum equation. How will you apply momentum equation for determining the force exerted by a flowing liquid on a pipe bend?

Aj

(b) A nozzle at the end of a 80 mm hose produces a jet 40 mm in diameter. Determine the force on the joint at the base of the nozzle when it is discharging 1200 liters of water per minute. [8+8]

6. (a) State the basic principle of continuity equation. Obtain an expression of continuity equation for a three dimensional - steady - incompressible fluid flow. √ (b) A flow is described by the stream function ψ= 2 3XY . Locate the point at which the velocity vector has a magnitude of 4 units and makes an angle of 150o with the x- axis. [8+8]

7. (a) Define coefficients of drag and lift and state factors affecting on which those coefficients depend. 1

Code No: 23024

RR

Set No - 1

(b) A kite has an effective area of0.4m2 and weighs 2.0 N in a wind of 40 km/hr., the drag on the kite is 12 N. Determine the tension in chord if the chord make an angle of45o with the horizontal. Also determine lift coefficient [8+8]. 8. (a) Write a note on surface tension and capillarity.

in

(b) A square opening 0.5 m X 0.5m in the vertical side of a tank is closed by a plate 0.5 m X 0.5m which can rotate about the horizontal axis of symmetry. Calculate

Aj

nt

uW

or

?????

ld .

i. the total water pressure on the plate ii. the depth of centre of pressure and iii. the torque required to maintain the plate in equilibrium in the vertical position when the head above the centre of the plate is 1 m [8+8]

2

Code No: 23024

RR

Set No - 2

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II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICS OF FLUIDS Aeronautical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) What factors account for the loss of energy in laminar flow? How does the energy loss vary with velocity of flow. [8+8]

ld .

(b) Derive the expression for Reynolds number.

2. (a) Define coefficients of drag and lift and state factors affecting on which those coefficients depend.

or

(b) A kite has an effective area of0.4m2 and weighs 2.0 N in a wind of 40 km/hr., the drag on the kite is 12 N. Determine the tension in chord if the chord make an angle of45o with the horizontal. Also determine lift coefficient [8+8]. 3. (a) State the momentum equation. How will you apply momentum equation for determining the force exerted by a flowing liquid on a pipe bend?

uW

(b) A nozzle at the end of a 80 mm hose produces a jet 40 mm in diameter. Determine the force on the joint at the base of the nozzle when it is discharging 1200 liters of water per minute. [8+8] 4. (a) Write a note on surface tension and capillarity. (b) A square opening 0.5 m X 0.5m in the vertical side of a tank is closed by a plate 0.5 m X 0.5m which can rotate about the horizontal axis of symmetry. Calculate

nt

i. the total water pressure on the plate ii. the depth of centre of pressure and iii. the torque required to maintain the plate in equilibrium in the vertical position when the head above the centre of the plate is 1 m [8+8]

Aj

5. (a) State the basic principle of continuity equation. Obtain an expression of continuity equation for a three dimensional - steady - incompressible fluid flow. √ (b) A flow is described by the stream function ψ= 2 3XY . Locate the point at which the velocity vector has a magnitude of 4 units and makes an angle of 150o with the x- axis. [8+8] 6. (a) A 150 mm x 75 mm Venturimeter with Cd = 0.98 is to be replaced by an orifice meter having a value of Cd = 0.6. If both the meters are to give the same differential mercury manometer reading for a discharge of 100 lps and the inlet dia. to remain 150 mm, what should be the diameter of orifice. (b) What is the necessity of ventilation of weirs. 3

[8+8]

Code No: 23024

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Set No - 2

7. (a) What is meant by Mach number (M), Zone of action and Zone of Silence? (b) Derive an expression for flow of compressible fluid through venturimeter. [8+8] 8. (a) what do you mean by minor and major losses in pipe flows .Under what conditions does a minor losses become a major loss?

Aj

nt

uW

or

?????

ld .

in

(b) Two reservoirs are connected by a pipe line of diameter 60cm and length 4000m. The difference of water level in the reservoir is 20m. At a distance of 1000m from the upper reservoir, a small pipe is connected to the pipe line. The water can be taken from the small pipe. Find the discharge to the lower reservoir if (i) No water is taken from the small pipe and (ii) 100 lit/sec of water is taken from small pipe [8+8]

4

Code No: 23024

RR

Set No - 3

in

II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICS OF FLUIDS Aeronautical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????

ld .

1. (a) State the basic principle of continuity equation. Obtain an expression of continuity equation for a three dimensional - steady - incompressible fluid flow. √ (b) A flow is described by the stream function ψ= 2 3XY . Locate the point at which the velocity vector has a magnitude of 4 units and makes an angle of 150o with the x- axis. [8+8] 2. (a) Define coefficients of drag and lift and state factors affecting on which those coefficients depend.

or

(b) A kite has an effective area of0.4m2 and weighs 2.0 N in a wind of 40 km/hr., the drag on the kite is 12 N. Determine the tension in chord if the chord make an angle of45o with the horizontal. Also determine lift coefficient [8+8]. 3. (a) What factors account for the loss of energy in laminar flow? How does the energy loss vary with velocity of flow.

uW

(b) Derive the expression for Reynolds number.

[8+8]

4. (a) what do you mean by minor and major losses in pipe flows .Under what conditions does a minor losses become a major loss?

nt

(b) Two reservoirs are connected by a pipe line of diameter 60cm and length 4000m. The difference of water level in the reservoir is 20m. At a distance of 1000m from the upper reservoir, a small pipe is connected to the pipe line. The water can be taken from the small pipe. Find the discharge to the lower reservoir if (i) No water is taken from the small pipe and (ii) 100 lit/sec of water is taken from small pipe [8+8]

5. (a) Write a note on surface tension and capillarity.

Aj

(b) A square opening 0.5 m X 0.5m in the vertical side of a tank is closed by a plate 0.5 m X 0.5m which can rotate about the horizontal axis of symmetry. Calculate i. the total water pressure on the plate ii. the depth of centre of pressure and iii. the torque required to maintain the plate in equilibrium in the vertical position when the head above the centre of the plate is 1 m [8+8]

6. (a) A 150 mm x 75 mm Venturimeter with Cd = 0.98 is to be replaced by an orifice meter having a value of Cd = 0.6. If both the meters are to give the same differential mercury manometer reading for a discharge of 100 lps and the inlet dia. to remain 150 mm, what should be the diameter of orifice. 5

Code No: 23024

RR

Set No - 3

(b) What is the necessity of ventilation of weirs.

[8+8]

7. (a) State the momentum equation. How will you apply momentum equation for determining the force exerted by a flowing liquid on a pipe bend?

in

(b) A nozzle at the end of a 80 mm hose produces a jet 40 mm in diameter. Determine the force on the joint at the base of the nozzle when it is discharging 1200 liters of water per minute. [8+8] 8. (a) What is meant by Mach number (M), Zone of action and Zone of Silence?

Aj

nt

uW

or

?????

ld .

(b) Derive an expression for flow of compressible fluid through venturimeter. [8+8]

6

Code No: 23024

RR

Set No - 4

in

II B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 MECHANICS OF FLUIDS Aeronautical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) what do you mean by minor and major losses in pipe flows .Under what conditions does a minor losses become a major loss?

or

ld .

(b) Two reservoirs are connected by a pipe line of diameter 60cm and length 4000m. The difference of water level in the reservoir is 20m. At a distance of 1000m from the upper reservoir, a small pipe is connected to the pipe line. The water can be taken from the small pipe. Find the discharge to the lower reservoir if (i) No water is taken from the small pipe and (ii) 100 lit/sec of water is taken from small pipe [8+8] 2. (a) What is meant by Mach number (M), Zone of action and Zone of Silence? (b) Derive an expression for flow of compressible fluid through venturimeter. [8+8]

uW

3. (a) Define coefficients of drag and lift and state factors affecting on which those coefficients depend. (b) A kite has an effective area of0.4m2 and weighs 2.0 N in a wind of 40 km/hr., the drag on the kite is 12 N. Determine the tension in chord if the chord make an angle of45o with the horizontal. Also determine lift coefficient [8+8]. 4. (a) State the momentum equation. How will you apply momentum equation for determining the force exerted by a flowing liquid on a pipe bend?

nt

(b) A nozzle at the end of a 80 mm hose produces a jet 40 mm in diameter. Determine the force on the joint at the base of the nozzle when it is discharging 1200 liters of water per minute. [8+8]

Aj

5. (a) A 150 mm x 75 mm Venturimeter with Cd = 0.98 is to be replaced by an orifice meter having a value of Cd = 0.6. If both the meters are to give the same differential mercury manometer reading for a discharge of 100 lps and the inlet dia. to remain 150 mm, what should be the diameter of orifice. (b) What is the necessity of ventilation of weirs.

[8+8]

6. (a) What factors account for the loss of energy in laminar flow? How does the energy loss vary with velocity of flow. (b) Derive the expression for Reynolds number.

[8+8]

7. (a) State the basic principle of continuity equation. Obtain an expression of continuity equation for a three dimensional - steady - incompressible fluid flow. 7

Code No: 23024

RR

Set No - 4

√ (b) A flow is described by the stream function ψ= 2 3XY . Locate the point at which the velocity vector has a magnitude of 4 units and makes an angle of 150o with the x- axis. [8+8] 8. (a) Write a note on surface tension and capillarity.

in

(b) A square opening 0.5 m X 0.5m in the vertical side of a tank is closed by a plate 0.5 m X 0.5m which can rotate about the horizontal axis of symmetry. Calculate

Aj

nt

uW

or

?????

ld .

i. the total water pressure on the plate ii. the depth of centre of pressure and iii. the torque required to maintain the plate in equilibrium in the vertical position when the head above the centre of the plate is 1 m [8+8]

8