# Mcq on Energy Equations and it's Applications - Venturimeter, orificemeter and pitot tube

## The Fluid mechanics is important subject for all Competitive exams, so let's learn about Concept of Mcq on Energy Equations and it's Applications - Venturimeter, orificemeter and pitot tube helps to modernize our society.So keeping these things in mind, Lets learn about the topic of Mcq on Energy Equations and it's Applications - Venturimeter, orificemeter and pitot tube. (adsbygoogle = window.adsbygoogle || []).push({});

 Mcq on Energy Equations and it's Applications - Venturimeter, orificemeter and pitot tube

### Objective questions on Energy Equations:-Mcq on Venturimeter, mcq on orificemeter and Mcq on pitot tube is as follows:-

1. Which is the cheapest instrument for measurement of discharge rate.
a) Venturimeter
b) Pitot tube
c) Orificemeter
d) None of the above

2. The working principle for the Orifice meter and Venturimeter are same.
A. True
B. False

3. The Orifice meter diameter is one fourth (1/4th) times the pipe diameter.
A. True
B. False

4. The fluid in motion is subjected to which of the following forces...
A. Body or volume forces
B. Surface forces
C. Linear forces
D. All of the above

5. The accuracy of Venturimeter readings is more than the Orifice meter.
A. True
B. False

6. Which of the following assumption is true about Bernoulli's equation..
A. Flow is steady and irrotational
B. Flow is incompressible and non viscous
C. Flow is continuous and homogeneous with uniform velocity.
D. All of the above

7. If the flow is assumed to be ideal and viscous force is zero the equation of motion is known as Euler equation of motion.
A. True
B. False

8. The accuracy of Pitot tube readings are more than the Orifice meter.
A. True
B. False

9. The Bernoulli's  is equation is based on....
A. Conservation of mass
B. Conservation of energy
C. Conservation of both mass and energy
D. None of the above

10. Speed of the aeroplane is measured with the pitot tube.
A. True
B. False

11. The Orifice meter having a smooth edge hole.
a) True
b) False

12. The principle of Venturimeter is based on the Bernoulli’s equation.
A. True
B. False

13. The pipe fitting with water having velocity 120 m/min and gauge pressure is 3.5 bar over the pipe is located at 8 m above the datum line. The total head of water in ....m.
A. 44.88m
B. 45.88m
C. 43.88m
D. 42.88m

14. The term dynamic pressure is used in all kinds of flow.
A. True
B. False

15. For measuring the speed of aeroplane which device is used....
A. Hot wire anemometer
B. Venturimeter
C. Pitot tube
D. None of the above

16. The difference  between total pressure and static pressure is called Dynamic pressure.
A. True
B. False

17. The pitot tube measuring the speed of air with the help of ....
a) Using temperature
b) Using velocity
c) Using mach number
d) Using the pressure difference

18. When the local flow velocity (v) is zero then, the value of static pressure and the total pressure is the same.
A. True
B. False

A. True
B. False

20. The use of pitot tube, is to convert the kinetic energy into....
a) potential energy
b) total energy
c) pressure energy
d) internal energy

21. The Orifice metre only used for measuring rate of flow in an closed pipe structure.
A. True
B. False

22. The pitot tube consists of a glass having bend in....
A. 70°
B. 80°
C. 90°
D. None of the above

23. The Pitot tubes with the flat faces are less sensitive.
A. True
B. False

24. Orificemeter consisting of a flat rectangular plate.
a) True
b) False

25. The pitot tube is used for measurement of...
A. Velocity of flow
B. Pressure of flow
C. Density of flow
D. None of the above

26. The diverging angle of Venturimeter is less than converging angle.
A. True
B. False

27. The Venturimeter having converging angle is....
A. 15°
B. 7°
C. 20°
D. 5°

28. The losses in Venturimeter is less than orifice metre.
A. True
B. False

29. The Venturimeter having diverging angle is....
A. 15°
B. 7°
C. 20°
D. 5°

30. The velocity of liquid at throat is higher than that of inlet in venturimeter.
A. True
B. False

31. The coefficient of discharge for Venturi metre is about...
A. 0.95
B. 0.98
C. 0.85
D. 0.63

32. Venturimeter is expensive than orificemeter and pitot tube.
A. True
B. False

33. In Venturimeter the pressure of liquid at throat is lower than that of Inlet.
A. True
B. False

34. The coefficient of discharge for orificemeter is about....
A. 0.95
B. 0.98
C. 0.85
D. 0.63

35. The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.
A. True
B. False

36. In the pitot tube error generating due to the location is...
a) position errors
b) normal errors
c) negligible errors
d) positive errors

37. The Absolute pressure is measuring with respect to the vacuum pressure.
A. True
B. False

38. The coefficient of discharge is equal to...
A. Cd = cv/cc
B. Cd = cv - cc
C. Cd = cv + cc
D. Cd = cv × cc

39. The coefficient of discharge is equal to  product of coefficient of velocity and coefficient of contraction.
A. True
B. False

40. The installing of orificemeter is easy compared to Venturimeter.
A. True
B. False

41. When Venturimeter is inclined for a given flow it will shows the.........reading.
A. Same
B. Higher
C. Lower
D. None of the above

42. The value of coefficient of velocity is more than value of coefficient of discharge.
A. True
B. False

43. The average value of coefficient of discharge for orificemeter is 0.63
A. True
B. False

44. The ratio of throat diameter and pipe diameter for Venturimeter is
A. 1:1
B. 1:2
C. 1:3
D. 2:1

45. The cost of orificemeter is less than the Venturimeter.
A. True
B. False

46. The most common device used for measure the speed of air is...
a) altimeter
b) thermometer
c) pressure gauge
d) pitot tube

47. The Static pressure is measuring of purely random motion of the molecules.
A. True
B. False

48. The Venturimeter consists of which of the following parts.
A. Converging section
B. Throat section
C. Divergent section
D. All of the above

49. In Venturimeter the flow takes place at absolute pressure.
A. True
B. False

50. The coefficient of discharge for external mouthpiece depends upon the length of the mouth piece.
A. True
B. False

51. Venturimeter measures the discharge of the flow.
A. True
B. False

52. The average value of coefficient of discharge for Venturimeter is 0.98
A. True
B. False

53. The coefficient of discharge for external mouthpiece is...
A. 0.375
B. 0.105
C. 0.855
D. 0.823

54. The coefficient of discharge in case of internal mouthpiece is less than external mouthpiece.
A. True
B. False

55. The Bernoulli's equation is applied to venturimeter and orificemeter and pitot tube.
A. True
B. False

56. The pitot tube having coefficient of friction is point 98 and used to measure velocity of water. The stagnation pressure recorded 3 m and static pressure is 2 m what is the velocity?
A. 4 m/s
B. 5 m/s
C. 4.34 m/s
D. 5.34 m/s

57. In case of venturimeter the pressure is maximum at midpoint of convergent section.
A. True
B. False

58. The current meter is used to measure flow rate.
A. True
B. False

59. Nozzle metre is used for measuring the discharge.
A. True
B. False

60. The current metre is used to measure point velocity of an open channel.
A. True
B. False

61. Wash basin or bath tub draining water throughout outlet is example of free vortex flow.
A. True
B. False

62. The flow of liquid in centrifugal pump casing after left the impeller is example of...
A. Free vortex flow
B. Forced vortex flow
C. Both free and forced vortex flow
D. None of the above

63. Forced vortex motion when a constant torque is applied to a fluid mass.
A. True
B. False

64. In a free vortex flow....
A. V. R = maximum
B. V. R = minimum
C. V. R = constant
D. None of the above

65. The Whirl pool in river is example of....
A. Free vortex flow
B. Forced vortex flow
C. Both free and forced vortex flow
D. None of the above

66. The Rotating fluid is known as vortex.
A. True
B. False

67. The motion of rotating mass of a fluid is known as for vortex motion of fluid.
A. True
B. False

68. The flow static pressure is measured by the device of wall pressure tap.
A. True
B. False

Here we concluding, If you have any queries about the topic of Mcq on Energy Equations and it's Applications - Venturimeter, orificemeter and pitot tube then feel free to comment below.

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