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Code No: 53008 Set No. 1 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

II B.Tech. I Sem., II Mid-Term Examinations, Oct/Nov 2012 FLUID MECHANICS AND HYDRAULIC MACHINERY

Objective Exam Name: ______________________________ Hall Ticket No.

Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10. I Choose the correct alternative: 1. Francis turbine is [ ]

(a) an impulse turbine (b) a radial flow impulse turbine (c) an axil flow turbine (d) a reaction radial flow turbine

2. The discharge through Kaplan turbine is given by [ ]

(a) Q = DBVt (b) 2 24Q d gH= (c) 2 20[ ]4 vQ D D

= (d) Q = 0.9 DBVt 3. Mechanical efficiency (mech) of a centrifugal pump is given by [ ]

(a) (power at the impeller)/S.H.P. (b) S.H.P./ power at the impeller (c) power possessed by water/power at the impeller (d) power possessed by water/S.H.P.

4. Surge tank in a pipe line is used to [ ] (a) reduce the loss of head due to friction in pipe (b) make the flow uniform in pipe (c) relieve the pressure due to water hammer (d) none of the above.

5. Run-away speed of a Pelton wheel means [ ] (a) full load speed (b) no load speed (c) no load speed with no governor mechanism (d) none of the above.

6. The net head (H) on the turbine is given by [ ] (a) H = Gross Head + Head lost due to friction (b) H = Gross Head Head lost due to friction

(c) H = Gross Head + 2

2Vg

Head lost due to friction (d ) H = cross head.

7. Hydraulic efficiency of a turbine is defined as the ratio of [ ]

(a) Power available at the inlet of turbine to power given by water to the runner (b) Power at the shaft of the turbine to power given by water to the runner (c) Power at the shaft of the turbine to the power at the inlet of turbine (d) None of the above.

8. A turbine is called reaction turbine if at the inlet of the turbine the total energy is [ ] (a) kinematic energy only (b) kinetic energy and pressure energy (c) pressure energy only (d) none of the above.

9. Unit power is the power developed by a turbine when [ ] (a) head on turbine is unity and discharge is also unity (b) head = one metre and speed is unity (c) head on turbine is unity (d) none of the above.

Cont2

A

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Code No: 53008 :2: Set No. 1 10. Main characteristic curves of a turbine means [ ]

(a) curves at constant speed (b) curves at constant efficiency (c) curves at constant head (d) none of the above.

II Fill in the blanks: 11. A pump is defined as a device which converts mechanical energy into ____ energy

12. Jet ratio (m) is defined as the ratio of diameter of ____ wheel to diameter of the jet of water. 13. Flow ratio is defined as the ratio of velocity of flow at inlet to the velocity given by ______________

14. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given

by _____

15. To discharge a large quantity of liquid by multi stage centrifugal pump, the impellers are connected in ______

16. Cavitation will take place if the pressure of the following fluid at any point is ____ than vapour pressure of the fluid

17. In a centrifugal pump the sum of suction head and delivery head is ____ head.

18. Draft tube is used for discharging water from the exit of a Francis and _________ turbine

19. Specific speed of a turbine is defined as the speed at which the turbine runs when working under unit head and develops unit ________________

20. ______ type of impeller is used for centrifugal pumps dealing with muds

-oOo-

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Code No: 53008 Set No. 2 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

II B.Tech. I Sem., II Mid-Term Examinations, Oct/Nov 2012 FLUID MECHANICS AND HYDRAULIC MACHINERY

Objective Exam Name: ______________________________ Hall Ticket No.

Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10. I Choose the correct alternative: 1. Surge tank in a pipe line is used to [ ]

(a) reduce the loss of head due to friction in pipe (b) make the flow uniform in pipe (c) relieve the pressure due to water hammer (d) none of the above.

2. Run-away speed of a Pelton wheel means [ ] (a) full load speed (b) no load speed (c) no load speed with no governor mechanism (d) none of the above.

3. The net head (H) on the turbine is given by [ ] (a) H = Gross Head + Head lost due to friction (b) H = Gross Head Head lost due to friction

(c) H = Gross Head + 2

2Vg

Head lost due to friction (d ) H = cross head.

4. Hydraulic efficiency of a turbine is defined as the ratio of [ ]

(a) Power available at the inlet of turbine to power given by water to the runner (b) Power at the shaft of the turbine to power given by water to the runner (c) Power at the shaft of the turbine to the power at the inlet of turbine (d) None of the above.

5. A turbine is called reaction turbine if at the inlet of the turbine the total energy is [ ] (a) kinematic energy only (b) kinetic energy and pressure energy (c) pressure energy only (d) none of the above.

6. Unit power is the power developed by a turbine when [ ] (a) head on turbine is unity and discharge is also unity (b) head = one metre and speed is unity (c) head on turbine is unity (d) none of the above.

7. Main characteristic curves of a turbine means [ ] (a) curves at constant speed (b) curves at constant efficiency (c) curves at constant head (d) none of the above.

8. Francis turbine is [ ]

(a) an impulse turbine (b) a radial flow impulse turbine (c) an axil flow turbine (d) a reaction radial flow turbine

9. The discharge through Kaplan turbine is given by [ ]

(a) Q = DBVt (b) 2 24Q d gH= (c) 2 20[ ]4 vQ D D

= (d) Q = 0.9 DBVt

Cont2

A

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Code No: 53008 :2: Set No. 2 10. Mechanical efficiency (mech) of a centrifugal pump is given by [ ]

(a) (power at the impeller)/S.H.P. (b) S.H.P./ power at the impeller (c) power possessed by water/power at the impeller (d) power possessed by water/S.H.P.

II Fill in the blanks: 11. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given

by _____

12. To discharge a large quantity of liquid by multi stage centrifugal pump, the impellers are connected in ______

13. Cavitation will take place if the pressure of the following fluid at any point is ____ than vapour pressure of the fluid

14. In a centrifugal pump the sum of suction head and delivery head is ____ head.

15. Draft tube is used for discharging water from the exit of a Francis and _________ turbine

16. Specific speed of a turbine is defined as the speed at which the turbine runs when working under unit head and develops unit ________________

17. ______ type of impeller is used for centrifugal pumps dealing with muds

18. A pump is defined as a device which converts mechanical energy into ____ energy

19. Jet ratio (m) is defined as the ratio of diameter of ____ wheel to diameter of the jet of water. 20. Flow ratio is defined as the ratio of velocity of flow at inlet to the velocity given by ___________

-oOo-

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Code No: 53008 Set No. 3 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

II B.Tech. I Sem., II Mid-Term Examinations, Oct/Nov 2012 FLUID MECHANICS AND HYDRAULIC MACHINERY

Objective Exam Name: ______________________________ Hall Ticket No.

Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10. I Choose the correct alternative: 1. The net head (H) on the turbine is given by [ ]

(a) H = Gross Head + Head lost due to friction (b) H = Gross Head Head lost due to friction

(c) H = Gross Head + 2

2Vg

Head lost due to friction (d ) H = cross head.

2. Hydraulic efficiency of a turbine is defined as the ratio of [ ]

(a) Power available at the inlet of turbine to power given by water to the runner (b) Power at the shaft of the turbine to power given by water to the runner (c) Power at the shaft of the turbine to the power at the inlet of turbine (d) None of the above.

3. A turbine is called reaction turbine if at the inlet of the turbine the total energy is [ ] (a) kinematic energy only (b) kinetic energy and pressure energy (c) pressure energy only (d) none of the above.

4. Unit power is the power developed by a turbine when [ ] (a) head on turbine is unity and discharge is also unity (b) head = one metre and speed is unity (c) head on turbine is unity (d) none of the above.

5. Main characteristic curves of a turbine means [ ]

(a) curves at constant speed (b) curves at constant efficiency (c) curves at constant head (d) none of the above.

6. Francis turbine is [ ]

(a) an impulse turbine (b) a radial flow impulse turbine (c) an axil flow turbine (d) a reaction radial flow turbine

7. The discharge through Kaplan turbine is given by [ ]

(a) Q = DBVt (b) 2 24Q d gH= (c) 2 20[ ]4 vQ D D

= (d) Q = 0.9 DBVt 8. Mechanical efficiency (mech) of a centrifugal pump is given by [ ]

(a) (power at the impeller)/S.H.P. (b) S.H.P./ power at the impeller (c) power possessed by water/power at the impeller (d) power possessed by water/S.H.P.

9. Surge tank in a pipe line is used to [ ] (a) reduce the loss of head due to friction in pipe (b) make the flow uniform in pipe (c) relieve the pressure due to water hammer (d) none of the above.

Cont2

A

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Code No: 53008 :2: Set No. 3 10. Run-away speed of a Pelton wheel means [ ]

(a) full load speed (b) no load speed (c) no load speed with no governor mechanism (d) none of the above.

II Fill in the blanks: 11. Cavitation will take place if the pressure of the following fluid at any point is ____ than vapour pressure

of the fluid

12. In a centrifugal pump the sum of suction head and delivery head is ____ head.

13. Draft tube is used for discharging water from the exit of a Francis and _________ turbine

14. Specific speed of a turbine is defined as the speed at which the turbine runs when working under unit head and develops unit ________________

15. ______ type of impeller is used for centrifugal pumps dealing with muds

16. A pump is defined as a device which converts mechanical energy into ____ energy

17. Jet ratio (m) is defined as the ratio of diameter of ____ wheel to diameter of the jet of water. 18. Flow ratio is defined as the ratio of velocity of flow at inlet to the velocity given by _______________

19. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given

by _____

20. To discharge a large quantity of liquid by multi stage centrifugal pump, the impellers are connected in ______

-oOo-

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Code No: 53008 Set No. 4 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

II B.Tech. I Sem., II Mid-Term Examinations, Oct/Nov 2012 FLUID MECHANICS AND HYDRAULIC MACHINERY

Objective Exam Name: ______________________________ Hall Ticket No.

Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10. I Choose the correct alternative: 1. A turbine is called reaction turbine if at the inlet of the turbine the total energy is [ ]

(a) kinematic energy only (b) kinetic energy and pressure energy (c) pressure energy only (d) none of the above.

2. Unit power is the power developed by a turbine when [ ] (a) head on turbine is unity and discharge is also unity (b) head = one metre and speed is unity (c) head on turbine is unity (d) none of the above.

3. Main characteristic curves of a turbine means [ ] (a) curves at constant speed (b) curves at constant efficiency (c) curves at constant head (d) none of the above.

4. Francis turbine is [ ]

(a) an impulse turbine (b) a radial flow impulse turbine (c) an axil flow turbine (d) a reaction radial flow turbine

5. The discharge through Kaplan turbine is given by [ ]

(a) Q = DBVt (b) 2 24Q d gH= (c) 2 20[ ]4 vQ D D

= (d) Q = 0.9 DBVt 6. Mechanical efficiency (mech) of a centrifugal pump is given by [ ]

(a) (power at the impeller)/S.H.P. (b) S.H.P./ power at the impeller (c) power possessed by water/power at the impeller (d) power possessed by water/S.H.P.

7. Surge tank in a pipe line is used to [ ] (a) reduce the loss of head due to friction in pipe (b) make the flow uniform in pipe (c) relieve the pressure due to water hammer (d) none of the above.

8. Run-away speed of a Pelton wheel means [ ] (a) full load speed (b) no load speed (c) no load speed with no governor mechanism (d) none of the above.

9. The net head (H) on the turbine is given by [ ] (a) H = Gross Head + Head lost due to friction (b) H = Gross Head Head lost due to friction

(c) H = Gross Head + 2

2Vg

Head lost due to friction (d ) H = cross head.

Cont2

A

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Code No: 53008 :2: Set No. 4

10. Hydraulic efficiency of a turbine is defined as the ratio of [ ]

(a) Power available at the inlet of turbine to power given by water to the runner (b) Power at the shaft of the turbine to power given by water to the runner (c) Power at the shaft of the turbine to the power at the inlet of turbine (d) None of the above.

II Fill in the blanks: 11. Draft tube is used for discharging water from the exit of a Francis and _________ turbine

12. Specific speed of a turbine is defined as the speed at which the turbine runs when working under unit

head and develops unit ________________

13. ______ type of impeller is used for centrifugal pumps dealing with muds

14. A pump is defined as a device which converts mechanical energy into ____ energy

15. Jet ratio (m) is defined as the ratio of diameter of ____ wheel to diameter of the jet of water. 16. Flow ratio is defined as the ratio of velocity of flow at inlet to the velocity given by _______________

17. The work done by impeller of a centrifugal pump on water per second per unit weight of water is given

by _____

18. To discharge a large quantity of liquid by multi stage centrifugal pump, the impellers are connected in ______

19. Cavitation will take place if the pressure of the following fluid at any point is ____ than vapour pressure of the fluid

20. In a centrifugal pump the sum of suction head and delivery head is ____ head.

-oOo-

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