pumps turbines measurement of flow - One Line Questions

1. A Pitot tube is primarily used to measure: — Velocity at a point
2. The principle behind the operation of an orifice meter is: — Bernoulli's equation
3. The operation of an electromagnetic flow meter is based on: — Faraday's law of electromagnetic induction
4. Which type of pump is most suitable for handling fluids with high viscosity? — Positive displacement pump
5. Which of the following is a characteristic of a centrifugal pump? — Discharge varies with head
6. The characteristic curve of a pump plots: — Head vs. discharge
7. Which component of a reaction turbine guides the water onto the runner and controls the flow rate? — Guide vanes
8. A 'weir' is primarily used for measuring: — Flow rate in an open channel
9. Which type of turbine operates with the water jet striking buckets on the periphery of the runner? — Pelton turbine
10. The maximum theoretical efficiency of a Pelton turbine is limited by: — The fact that the bucket cannot completely reverse the jet's direction
11. The coefficient of discharge for an orifice meter is typically: — Less than 1
12. The discharge over a rectangular weir is proportional to: — H^2.5
13. A Kaplan turbine is particularly suitable for: — Low head, high discharge
14. A multistage centrifugal pump is used to achieve: — Higher head
15. A Francis turbine is a type of: — Reaction turbine
16. The main purpose of a draft tube in a reaction turbine is to: — Recover the kinetic energy of the water leaving the runner
17. What is the main advantage of a V-notch weir over a rectangular weir for measuring flow? — It is more accurate for low flow rates
18. Which turbine is best suited for high head and low discharge applications? — Pelton turbine
19. What is the primary advantage of using an ultrasonic flow meter? — Ability to measure flow in dirty or corrosive fluids
20. Which of the following is NOT a type of flow measurement device? — Manometer
21. The 'vena contracta' is the point of: — Minimum cross-sectional area of a jet after leaving a nozzle or orifice
22. The overall efficiency of a pump is the product of: — Hydraulic efficiency, mechanical efficiency, and volumetric efficiency
23. The maximum efficiency of a centrifugal pump is usually achieved when the impeller is: — Operating at its best efficiency point (BEP)
24. Which flow measurement device requires a conductive fluid to operate? — Electromagnetic flow meter
25. Which flow measurement device consists of a converging section, a throat, and a diverging section? — Venturimeter
26. Which type of turbine is characterized by adjustable guide vanes and a propeller-like runner? — Kaplan turbine
27. A Venturimeter is used to measure: — Flow rate in a pipe
28. The 'runner' is the rotating component of a: — Turbine
29. A 'critical depth' is a concept primarily associated with: — Open channel flow
30. In a Francis turbine, the water flows: — Radially inwards and then axially
31. The efficiency of a turbine is defined as the ratio of: — Shaft power to water power
32. Which parameter is used to characterize the performance of a turbine under varying head and speed? — Specific speed
33. For a given head, the discharge of a Pelton turbine is primarily controlled by the: — Needle valve opening
34. The phenomenon of 'water hammer' in a pipeline is caused by: — Sudden closure of a valve
35. A 'sump' in a pumping system is typically: — The source of fluid from which the pump draws water
36. Cavitation in a centrifugal pump occurs when: —
37. The shut-off head of a centrifugal pump is: — The head at which the pump delivers zero discharge
38. The 'head' in a pump refers to: — The total energy difference, including pressure, velocity, and elevation, between the suction and discharge sides
39. What is the 'specific speed' of a turbine? — The speed of the turbine at which it develops a unit head
40. The 'breakdown torque' in a turbine refers to: — The torque at which the turbine stops delivering useful power
41. In a flow measurement using a Venturimeter, the pressure difference is measured between the: — Inlet and the throat
42. What is the function of a governor in a hydraulic power plant? — To regulate the speed of the turbine
43. What is the primary function of a volute casing in a centrifugal pump? — To convert kinetic energy into pressure energy
44. What is the purpose of a foot valve in a suction pipe of a centrifugal pump? — To prevent backflow and keep the pipe full of water
45. A positive displacement pump traps a fixed amount of fluid and forces (displaces) it into the discharge pipe. — True
46. Which flow measurement device measures the velocity of fluid by detecting the frequency of reflected sound waves? — Doppler ultrasonic flow meter
47. Which device uses a float that rises and falls with the liquid level to indicate flow rate? — Rotameter
48. The 'specific speed' of a pump is defined as the speed at which it would run to deliver: — Unit discharge at unit head
49. Which of the following is a common method for measuring flow rate in an open channel? — Weir
50. The efficiency of a centrifugal pump is generally highest at: — Best efficiency point (BEP)
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