Fluid Mechanics and Hydraulic Machines (3141906) MCQs

MCQs of Dimensional Analysis and Similarities

Showing 21 to 30 out of 31 Questions
1 2 3 4
21.
Which among the following have the same forces acting on them?
(a) Geometric similarity
(b) Kinematic similarity
(c) Dynamic similarity
(d) Conditional similarity
Answer:

Option (c)

22.
The dynamic similarity between model and prototype implies that
(a) the forces acting at corresponding locations are the same
(b) the flow pattern is similar
(c) there is a point to point correspondence between the two systems
(d) both the systems undergo similar rates of change of motion
Answer:

Option (a)

23.
Which of the following is a dimensionless equation?
(a) Reynold's equation
(b) Euler's equation
(c) Weber's equation
(d) All of the above
Answer:

Option (d)

24.
Reynolds number is the ratio of inertia force to
(a) gravitational force
(b) surface tension force
(c) elasticity force
(d) viscous force
Answer:

Option (d)

25.
Froude number is the square root of the ratio of inertia force to
(a) gravitational force
(b) surface tension force
(c) elasticity force
(d) viscous force
Answer:

Option (a)

26.
Euler's dimensionless number relates the following
(a) inertial force and gravity
(b) viscous force and inertial force
(c) pressure force and inertial force
(d) pressure force and viscous force
Answer:

Option (c)

27.
The square root of the ratio of inertia force to surface tension is known as
(a) Mach number
(b) Froude number
(c) Reynold's number
(d) Weber number
Answer:

Option (d)

28.
The square root of the ratio of inertia force to elastic force is known as
(a) Mach number
(b) Froude number
(c) Reynold's number
(d) Weber number
Answer:

Option (a)

29.
Reynold's number is significant in
(a) supersonics, as with projectile and jet propulsion
(b) full immersion or completely enclosed flow as with pipes, aircraft, nozzles, etc.
(c) simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave-making effects, as with ship's hulls
(d) all of the above
Answer:

Option (b)

30.
Mach number is significant in
(a) supersonics, as with projectile and jet propulsion
(b) full immersion or completely enclosed flow as with pipes, aircraft, nozzles, etc.
(c) simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave-making effects, as with ship's hulls
(d) all of the above
Answer:

Option (a)

Showing 21 to 30 out of 31 Questions
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