Mcq on boundary layer theory

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Mcq on boundary layer theory
Mcq on boundary layer theory 

Objective questions Mcq on boundary layer theory:-

1. The flow is laminar or turbulent is decided by which of the following number.
a) Reynold’s 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 body
b) 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) Vortices
b) Vertices
c) Volume
d) Velocity

Answer:- A
6. The eddy viscosity is a turbulent transfer of the....
a) Fluid
b) 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

Answer:- C

9. The Boundary layer separation that does not undergo detachmenting.
a) True
b) False

Answer:- B

10. With the boundary layer separation, the displacement thickness is......
a) Increases
b) Decreases
c) Remains Same
d) Independent

Answer:- A
11. The instrument used for the automatic control during the fluid flow is.....
a) Rotameter
b) 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= 0
b) 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 law
b) 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


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