In the mechanical Engineering fluid mechanics is vital role for the all Competitive exams, so let's learn about Concept of Mcq on boundary layer theory helps to modernization.So keeping these things in mind, Lets understand the topic of Mcq on boundary layer theory.
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| Mcq on boundary layer theory |
Objective questions Mcq on boundary layer theory:-
a) Reynold’s number
b) Mach number
c) Froude number
d) Knudsen number
b) Mach number
c) Froude number
d) Knudsen number
Answer:- A
2. The separation of flow occurs if the fluid is traveling away from the......
a) Surface of bodyb) Fluid of body
c) Adverse pressure gradient
d) Inter-molecular space
Answer:- C
3. The flow is laminar (or) turbulent is decided by Reynold's number.
A. True
B. False
Answer:- A
4. The adverse pressure gradient plays an important role in separation of the flow.
A. True
B. False
Answer:- A
5. The swirl causing due to eddies are known as...
a) Vorticesb) Vertices
c) Volume
d) Velocity
Answer:- A
6. The eddy viscosity is a turbulent transfer of the....
a) Fluidb) Heat
c) Momentum
d) Pressure
Answer:- C
7. Eddy viscosity are takes place on the large scale.
A. True
B. False
Answer:- A
8. The laminar flow convert into the turbulent flow by which method.
a) Dead Weight Gauge
b) Vacuum Gauge
c) Turbulator
d) Ionization of Gauge
b) Vacuum Gauge
c) Turbulator
d) Ionization of Gauge
Answer:- C
9. The Boundary layer separation that does not undergo detachmenting.
a) Trueb) False
Answer:- B
10. With the boundary layer separation, the displacement thickness is......
a) Increasesb) Decreases
c) Remains Same
d) Independent
Answer:- A
11. The instrument used for the automatic control during the fluid flow is.....
a) Rotameterb) Pulley plate
c) Rotary Pistons
d) Pilot Static Tube
Answer:- D
12. What is mean by rhe D’Alembert’s Paradox in fluid mechanics.
a) the Resistance= 0b) the Drag force= 0
c) the Temperature = 0
d) the pressure gradient= 0
Answer:- B
13. The Reynold's number for transition flow is in between 2000 to 4000.
A. True
B. False
Answer:- A
14. The steady state flow need not be satisfy the Kirchhoff’s law.
A. True
B. False
Answer:- A
15. The steady state flow must satisfy the which of the following law....
a) Kirchhoff’s lawb) Newtons law
c) Rutherford experiment law
d) Kepler law
Answer:- A
16. The vertical distance from boundary surfaces in that velocity riches 99% of the free stream velocity, is called as.....
A. Laminar boundary layer
B. Turbulent boundary layer
C. Boundary layer thickness
D. None of the above
Answer:- C
17. The vertical distance from boundary surfaces in that velocity riches 99% of the free stream velocity, is called as Boundary layer thickness.
A. True
B. False
Answer:- A
18. The boundary layer thickness is also called as nominal thickness.
A. True
B. False
Answer:- A
19. The boundary layer thickness is also called as disturbance thickness of the flow.
A. True
B. False
Answer:- A
20. The velocity of distribution is parabolic in laminar boundary layer.
A. True
B. False
Answer:- A
21. Which of the following is method to prevent flow separation.
A. Use of rough boundaries
B. By creating suction of the moving fluid
C. Bhai use of smaller divergence angle
D. All of the above
Answer:- D
22. The flow separation in boundary layer can prevent by providing guide-blades in the band.
A. True
B. False
Answer:- A
23. In boundary layer the shear stress is maximum at the wall.
A. True
B. False
Answer:- A
24. For laminar zone the velocity profile will be....
A. Linear
B. Parabolic
C. Logarithmic
D. None of the above
Answer:- B
25. For turbulent zone the velocity profile will be....
A. Linear
B. Parabolic
C. Logarithmic
D. None of the above
Answer:- C
26. For laminar sub layer the velocity profile will be....
A. Linear
B. Parabolic
C. Logarithmic
D. None of the above
Answer:- A
27. The velocity profile is logarithmic for turbulent zone in boundary layer theory.
A. True
B. False
Answer:- A
28. In flow through circular pipe the mean velocity is half of the Maximum velocity.
A. True
B. False
Answer:- A
29. The maximum velocity is twice the mean velocity when the flow flowing through a circular pipe.
A. True
B. False
Answer:- A
30. The discharge from pipe is equal to product of area and velocity.
A. True
B. False
Answer:- A
Here we concluding, If you have any queries about the topic of Mcq on boundary layer theory, then feel free to comment below.
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