III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 HYDRAULIC MACHINERY AND SYSTEMS Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) What are hydraulic systems? Describe briefly a hydrostatic and hydro-kinetic system and cite examples.
2. (a) Explain the working of a direct-acting lift. (b) Describe with neat sketch torque converter. 3. (a) How do you classify water turbines?
[8+8]
ld .
(b) Describe the principle of working of a vane pump with a neat sketch.
or
(b) Define and explain different efficiencies of a water turbine.
[8+8]
[8+8]
4. (a) Why will the centrifugal pump function only when started at or above minimum speed?
uW
(b) Why is the pump called centrifugal pump? How is the centrifugal action present Inside the casing.? [8+8] 5. (a) When does the geometric similarity exist between model and prototype? (b) What is priming ? What is its necessity ? Explain the procedure to do priming. [8+8] 6. (a) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in the direction of the jet.
nt
(b) A jet of water of diameter 7.5 cm moving with a velocity of 25 m/s strikes a fixed plate in such a way that the angle between the jet and plate is 600 . Find the force exerted by the jet on the plate in the direction normal to the plate and in the direction of the jet. [6+10]
Aj
7. (a) Differentiate between a reciprocating pump and a centrifugal pump. (b) Derive the expression for power required to drive a reciprocating pump. (c) What are the functions of nonreturn valves in a reciprocating pump. [8+4+4]
8. (a) Write a short note on the factors influencing the performance of turbines? (b) Obtain an expression for the specific speed of a turbine? ?????
1
[8+8]
Code No: 15011
NR
Set No - 2
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 HYDRAULIC MACHINERY AND SYSTEMS Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Why will the centrifugal pump function only when started at or above minimum speed?
ld .
(b) Why is the pump called centrifugal pump? How is the centrifugal action present Inside the casing.? [8+8] 2. (a) Differentiate between a reciprocating pump and a centrifugal pump.
(b) Derive the expression for power required to drive a reciprocating pump.
or
(c) What are the functions of nonreturn valves in a reciprocating pump. [8+4+4] 3. (a) How do you classify water turbines?
(b) Define and explain different efficiencies of a water turbine.
[8+8]
uW
4. (a) Explain the working of a direct-acting lift.
(b) Describe with neat sketch torque converter.
[8+8]
5. (a) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in the direction of the jet.
nt
(b) A jet of water of diameter 7.5 cm moving with a velocity of 25 m/s strikes a fixed plate in such a way that the angle between the jet and plate is 600 . Find the force exerted by the jet on the plate in the direction normal to the plate and in the direction of the jet. [6+10] 6. (a) Write a short note on the factors influencing the performance of turbines? (b) Obtain an expression for the specific speed of a turbine?
[8+8]
Aj
7. (a) What are hydraulic systems? Describe briefly a hydrostatic and hydro-kinetic system and cite examples. (b) Describe the principle of working of a vane pump with a neat sketch.
[8+8]
8. (a) When does the geometric similarity exist between model and prototype? (b) What is priming ? What is its necessity ? Explain the procedure to do priming. [8+8] ?????
2
Code No: 15011
NR
Set No - 3
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 HYDRAULIC MACHINERY AND SYSTEMS Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Differentiate between a reciprocating pump and a centrifugal pump.
(b) Derive the expression for power required to drive a reciprocating pump.
ld .
(c) What are the functions of nonreturn valves in a reciprocating pump. [8+4+4] 2. (a) When does the geometric similarity exist between model and prototype?
(b) What is priming ? What is its necessity ? Explain the procedure to do priming. [8+8]
or
3. (a) Why will the centrifugal pump function only when started at or above minimum speed?
uW
(b) Why is the pump called centrifugal pump? How is the centrifugal action present Inside the casing.? [8+8] 4. (a) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in the direction of the jet. (b) A jet of water of diameter 7.5 cm moving with a velocity of 25 m/s strikes a fixed plate in such a way that the angle between the jet and plate is 600 . Find the force exerted by the jet on the plate in the direction normal to the plate and in the direction of the jet. [6+10]
nt
5. (a) Explain the working of a direct-acting lift. (b) Describe with neat sketch torque converter.
[8+8]
6. (a) Write a short note on the factors influencing the performance of turbines? (b) Obtain an expression for the specific speed of a turbine?
[8+8]
Aj
7. (a) What are hydraulic systems? Describe briefly a hydrostatic and hydro-kinetic system and cite examples. (b) Describe the principle of working of a vane pump with a neat sketch.
[8+8]
8. (a) How do you classify water turbines? (b) Define and explain different efficiencies of a water turbine. ?????
3
[8+8]
Code No: 15011
NR
Set No - 4
1. (a) How do you classify water turbines?
[8+8]
ld .
(b) Define and explain different efficiencies of a water turbine.
in
III B.Tech I Semester Supplimentary Examinations,Nov/Dec 2009 HYDRAULIC MACHINERY AND SYSTEMS Mechanical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
2. (a) Obtain an expression for the force exerted by a jet of water on a fixed vertical plate in the direction of the jet.
or
(b) A jet of water of diameter 7.5 cm moving with a velocity of 25 m/s strikes a fixed plate in such a way that the angle between the jet and plate is 600 . Find the force exerted by the jet on the plate in the direction normal to the plate and in the direction of the jet. [6+10] 3. (a) When does the geometric similarity exist between model and prototype?
(b) What is priming ? What is its necessity ? Explain the procedure to do priming. [8+8]
uW
4. (a) Why will the centrifugal pump function only when started at or above minimum speed? (b) Why is the pump called centrifugal pump? How is the centrifugal action present Inside the casing.? [8+8] 5. (a) Write a short note on the factors influencing the performance of turbines? [8+8]
nt
(b) Obtain an expression for the specific speed of a turbine? 6. (a) Differentiate between a reciprocating pump and a centrifugal pump.
(b) Derive the expression for power required to drive a reciprocating pump. (c) What are the functions of nonreturn valves in a reciprocating pump. [8+4+4]
Aj
7. (a) What are hydraulic systems? Describe briefly a hydrostatic and hydro-kinetic system and cite examples. (b) Describe the principle of working of a vane pump with a neat sketch.
[8+8]
8. (a) Explain the working of a direct-acting lift. (b) Describe with neat sketch torque converter. ?????
[8+4+4] · 8. (a) Write a short note on the factors influencing the performance of turbines? (b) Obtain an expression for the specific speed of a turbine? [8+8]. *****.
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