mechanical-engineering-hydraulic-machines Related Question Answers

1. Discharge of a centrifugal pump is

2. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is

3. The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.

4. The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.

5. Geometric similarity is said to exist between the model and the prototype, if both of them

6. The speed of a turbine runner is

7. The original name of Sriramakrishna Paramhamsa?

8. Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

9. In a reaction turbine, the draft tube is used

10. The power produced by the reaction turbine is __________ to the head of water.

11. Slip of a reciprocating pump is defined as the

12. The efficiency of a centrifugal pump will be maximum when the blades are bent backward.

13. Multi-stage centrifugal pumps are used to

14. The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is

15. Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in metres, and Hd = Delivery head in metres)

16. Which of the following pump is preferred for flood control and irrigation applications?

17. The efficiency of a Pelton wheel working under constant head __________ with the increase in power.

18. The discharge of a centrifugal pump working under constant head __________ with the speed.

19. Before the rise of Ranjith Singh, Punjab was under the control of?

20. Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.

21. The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

22. Which of the following turbine is preferred for 0 to 25 m head of water?

23. The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.

24. The overall efficiency of a reaction turbine is the ratio of

25. Work done by a turbine __________ upon the weight of water flowing per second.

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