flow measurement venturimeter pilot tube orifice meter - One Line Questions

1. For accurate velocity measurement with a Pitot tube, the tube opening must be: — Aligned with the flow direction
2. What is the primary principle behind the operation of a Venturimeter? — Bernoulli's principle
3. A Pitot tube is unsuitable for measuring flow in: — Pipelines with significant suspended solids
4. Which of the following is a type of orifice plate? — Concentric orifice
5. The theoretical discharge through an orifice is calculated using the pressure difference and the principle of: — Torricelli's theorem
6. Which of the following is NOT a component of a standard Venturimeter? — Measuring weir
7. If the fluid velocity increases, the dynamic pressure will: — Increase
8. In a Venturimeter, as the fluid flows from the wider section to the narrower throat, its velocity: — Increases
9. The relationship between pressure and velocity in Bernoulli's principle is: — Inversely proportional
10. The ratio of the area at the vena contracta to the area of the orifice is called the: — Contraction coefficient
11. A Pitot tube measures the difference between stagnation pressure and: — Static pressure
12. In a Rotameter, the float rises when: — Flow rate increases
13. An orifice meter consists of a plate with an opening inserted in a pipeline, and it creates a: — Pressure drop due to restriction
14. The discharge coefficient for an orifice meter is generally: — Lower than that of a Venturimeter
15. A Pitot tube is most accurate when the flow is: — Laminar and uniform
16. The pressure tapping for a Pitot tube should ideally be placed: — Perpendicular to the flow direction
17. In a Venturimeter, the angle of the diverging section is typically kept small to: — Reduce head loss
18. What is a significant limitation of using a Pitot tube? — It is prone to clogging in fluids with suspended solids
19. What is the main drawback of using a Pitot tube for flow measurement in a pipeline? — It requires a long straight run of pipe
20. Which factor significantly influences the discharge coefficient of an orifice meter? — Ratio of orifice diameter to pipe diameter
21. The discharge coefficient for a Venturimeter is typically: — Between 0.95 and 0.99
22. What is the main advantage of using a Venturimeter for flow measurement? — Low head loss
23. What is the primary advantage of an orifice meter over a Venturimeter? — Lower cost and simpler construction
24. Compared to a Venturimeter, an orifice meter typically results in: — Higher head loss
25. The vena contracta is the point where the fluid stream has: — Minimum area and maximum velocity
26. The orifice meter is a device used for: — Measuring fluid flow rate
27. Which flow measurement device is most suitable for applications where minimal head loss is critical? — Venturimeter
28. For measuring the flow of highly viscous fluids, which device might be preferred due to lower head loss? — Venturimeter
29. Which of the following is a less common type of flow measurement device based on differential pressure? — Flow nozzle
30. Which of the following is a type of differential pressure flow meter? — Venturimeter
31. For a Venturimeter, the flow rate is proportional to the square root of the: — Pressure difference between inlet and throat
32. According to Bernoulli's principle, as the velocity of a fluid increases, its: — Pressure decreases
33. The velocity of a fluid at a point using a Pitot tube is given by the formula: — sqrt(2 * (P_stagnation - P_static) / rho)
34. A Pitot tube is primarily used to measure: — Velocity at a point
35. A Pitot tube measures the velocity of a fluid by determining the difference between: — Stagnation pressure and static pressure
36. The stagnation pressure measured by a Pitot tube is equal to the sum of: — Static pressure and kinetic energy per unit volume
37. The discharge coefficient of a Venturimeter is relatively constant over a wide range of Reynolds numbers because: — The diverging section minimizes losses
38. The accuracy of an orifice meter is generally affected by: — The sharpness of the orifice edge
39. The flow rate through an orifice meter is calculated using the pressure difference between the upstream and the: — Vena contracta
40. What is the purpose of the diverging section in a Venturimeter? — To increase pressure and recover kinetic energy
41. In an orifice meter, the point of maximum velocity and minimum pressure occurs at the: — The vena contracta
42. The primary application of a Venturimeter is for measuring: — Flow rate in pipes
43. The ratio of the actual discharge to the theoretical discharge through an orifice meter is known as the: — Discharge coefficient
44. The stagnation point in a fluid flow is where the: — Velocity is zero
45. For measuring the velocity of a high-speed aircraft, which instrument is commonly used? — Pitot tube
46. Which device measures flow rate by balancing gravitational forces with drag forces? — Rotameter
47. The 'vena contracta' effect is most pronounced in which flow measurement device? — Orifice meter
48. Which device measures flow rate by comparing the weight of the fluid displaced by a float? — Rotameter
49. Which of these devices is most sensitive to changes in flow rate for a given size? — Orifice meter
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