The mechanical Engineering in that the fluid mechanics is vital role to all Competitive exams, so let's learn about topic of Mcq on flow through pipe to clear all the concepts.
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| Mcq on flow through pipe |
Objective questions MCQ on Flow through pipes is as follows:-
1. Major loss in a pipe is a......
a) frictional loss
b) shock loss
c) entry loss
d) exit loss
a) frictional loss
b) shock loss
c) entry loss
d) exit loss
Answer:- A
2. The the major loss in a pipe is about......
A. 70 - 80 %
B. 80 - 90 %
C. 60 - 70 %
D. None of the above
Answer:- B
3. When a flow through pipe the pressure in a pipe is greater than atmospheric pressure.
A. True
B. False
Answer:- A
4. The frictional resistance of fluids in the motion is proportional to velocity in an laminar flow.
A. True
B. False
Answer:- A
5.The frictional resistance of fluids in the motion is proportional to the square of the velocity in an turbulent flow.
A. True
B. False
Answer:- A
6. In a fully developed pipe flow with zero acceleration the pressure drop is linear in a pipe.
A. True
B. False
Answer:- A
7. major losses occurs in pipes due to which of the following property of fluid.
a) density of fluidb) specific gravity
c) viscosity of fluid
d) compressibility
Answer:- C
8. The inertia force is......
A. Mass + acceleration
B. Mass - acceleration
C. Mass × acceleration
D. Mass ÷ acceleration
Answer:- C
9. the frictional resistance is proportional to the surface area of the contact.
A. True
B. False
Answer:- A
10. The frictional resistance of the fluids in motion which varying with temperature for laminar and Turbulent flow.
A. True
B. False
Answer:- A
11. The bend coefficient depends on.....
A. radius of curvature of the bend
B. diameter of the pipe
C. angle of the bend
D. All of the above
Answer:- D
12. The hydraulic diameter inversely proportional the wetted perimeter.
A. True
B. False
Answer:- A
13. Which of the following is a minor loss for a flow through pipes.
A. Sudden contraction and expansion
B. Loss at inlet and outlet
C. Loss due to bend
D. All of the above
Answer:- D
14. The bend coefficient in a pipe depends on the radius of curvature , diameter of the pipe and also angle of the bend.
A. True
B. False
Answer:- A
15. The Darcy's friction factor for major loss is....
A. Equal to coefficient of friction
B. 2 × coefficient of friction
C. 3 × coefficient of friction
D. 4 × coefficient of friction
Answer:- D
16. The friction factor for laminar flow is...
A. 16/Re
B. 64/Re
C. 60/Re
D. 6/Re
Answer:- B
17. The fluid friction for the laminar flow is is independent of the pressure.
A. True
B. False
Answer:- A
18. Any head loss in the floor profile other than fiction loss is considered as a major loss.
A. True
B. False
Answer:- A
19. For series pipe connection the discharge through pipe is constant
A. True
B. False
Answer:- A
20. For parallel pipe connection the head loss is constant throughout the pipe.
A. True
B. False
Answer:- A
21. For series pipe connection the head loss is....
A. H1- H2
B. H1+H2
C. H1×H2
D. None of the above
Answer:- B
22. For maximum power transmission head loss (Hf) is....
A. H/2
B. H/3
C. H
D. H/4
Answer:- B
23. The head loss at the inlet of the pipe is that at it’s outlet...
a) equal tob) half
c) twice of
d) four times
Answer:- B
24. The maximum transmission efficiency corresponding to maximum power is....
A. 75%
B. 63%
C. 66.77%
D. 65%
Answer:- C
25. Corresponding to maximum power transmission the efficiency of power transmission is 2/3.
A. True
B. False
Answer:- A
26. The efficiency corresponding to maximum transmission of power is not maximum.
A. True
B. False
Answer:- A
27. The sum of pressure head, kinetic head and datum head is called as......
A. Hydraulic gradient line
B. Total energy line
C. Total equations line
D. Transmission line
Answer:- B
28. The sum of pressure head and datum head is called as....
A. Hydraulic gradient line
B. Total energy line
C. Total equations line
D. Transmission line
Answer:- A
29. The datum head is also called as potential head.
A. True
B. False
Answer:- A
30. The difference between Total energy line and hydraulic gradient line is....
A. V^2/2
B. V^2/2g
C. V/2
D. V/2g
Answer:- B
31. The difference of Total energy line and hydraulic energy line is directly proportional to the square of velocity.
A. True
B. False
Answer:- A
32. The hydraulic gradient line is always....... than Total energy line..
A. Parallel and higher
B. Parallel and lower
C. Incline and higher
D. Incline and lower
Answer:- B
33. The hydraulic gradient line (HGL) is always parallel and lower than Total energy line (TEL).
A. True
B. False
Answer:- A
34. The total energy line is always horizontal for ideal fluid flow.
A. True
B. False
Answer:- A
35. The total energy line is always slop downward for real fluid flow.
A. True
B. False
Answer:- A
36. The total energy line is always horizontal for real fluid flow.
A. True
B. False
Answer:- B
37. If the compound pipe is to be replaced by pipe of uniform diameter that pipe called as...
A. Uniform pipe
B. Equivalent pipe
C. Long pipe
D. Series pipe
Answer:- B
38. For the equivalent pipe the loss of aid and discharge of the both the pipes should be same.
A. True
B. False
Answer:- A
39. For parallel pipe The rate of discharge in main pipe is equal to the sum of discharge in each pipe.
A. True
B. False
Answer:- A
40. A long bend pipe used to connect the two reservoir at a different level by the high ridge called as...
A. Summit
B. Syphon
C. Connecting reservoir
D. None of the above
Answer:- B
41. The highest point of the siphon is called as...
A. Summit point
B. Syphon point
C. Connecting reservoir point
D. None of the above
Answer:- A
42. The magnitude of water hammer depends on.....
A. Length of pipe
B. Elastic property of pipe material
C. Liquid flowing in pipe
D. All of the above
Answer:- D
43. Chezy formula is used for flow through open channel.
A. True
B. False
Answer:- A
44. The purpose of surge tank is...
A. To control the pressure variation
B. To eliminate the water hammer effect
C. To regulate the flow of water
D. All of the above
Answer:- D
45. The velocity of flow is same at all point in cross section of a channel.
A. True
B. False
Answer:- B
46. The air vessel is provided at the summit in a syphon to avoid the interruption in the flow.
A. True
B. False
Answer:- B
47. The nozzle is made up generally of convergent shape.
A. True
B. False
Answer:- A
48. The pressure of fluid due to hammer blow is..
A. Directly proportional to density
B. Directly proportional to square root of density
C. Inversely proportional to density
D. Inversely to square root of viscosity
Answer:- B
49. Water hammer occurs due to sudden change in velocity of fluid.
A. True
B. False
Answer:- A
50. The higher efficiency is with.....
A. Square channel
B. rectangular channel
C. Trapezoidal channel
D. Circular channel
Answer:- C
51. The trapezoidal channel gives the highest efficiency in all Channel.
A. True
B. False
Answer:- A
52. The time taken for a round trip of pressure wave forward and backward called as critical time.
A. True
B. False
Answer:- A
53. The pipe of length 916 m v are subjected to pressure wave 480 m/s due to rapid close. The critical time for the valve is.......... Seconds.
A. 2 sec
B. 3 sec
C. 4 sec
D. 5 sec
Answer:- C
54. In water hammer the rising pressure may be larger than and the pipe in the pipe will be burst.
A. True
B. False
Answer:- A
55. The the Minor loss in a pipe is about......
A. 70 - 80 %
B. 80 - 90 %
C. 60 - 70 %
D. 10 - 20 %
Answer:- D
56. The Darcy-Weisbach’s formula are used for calculate head loss in a flow through pipes.
A. True
B. False
Answer:- A
57. The critical depth metre is used to measure hydraulic jump.
A. True
B. False
Answer:- A
58. The flow of turbulent takes place at the high velocities.
A. True
B. False
Answer:- A
59. The velocity corresponding to Reynolds number of 2000 is called as.....
A. Subsonic velocity
B. Lower critical velocity
C. Super sonic velocity
D. Higher critical velocity
Answer:- B
60. The velocity corresponding to Reynolds number of 2800 is called as.....
A. Subsonic velocity
B. Lower critical velocity
C. Super sonic velocity
D. Higher critical velocity
Answer:- D
61. The bulk modulus of fluid is increases as a pressure increase.
A. True
B. False
Answer:- A
62. Reynolds number gives inertia force to gravity force.
A. True
B. False
Answer:- B
63. The weir is made up of masonry or concrete.
A. True
B. False
Answer:- A
Here we concluding, If you have any queries about the topic of Mcq on flow through pipe, then feel free to comment below.
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