Fluid Mechanics & Hydraulics (3140611) MCQs

MCQs of Fluid Kinematics & Dynamics

Showing 31 to 40 out of 48 Questions
31.
If ψ=x2-y2 is the stream function in a 2-D flow field, then the magnitude of the velocity vector at point (1,1) would be
(a) 0
(b) 4
(c) 8
(d) 2(2)0.5
Answer:

Option (d)

32.
A steady irrotational flow of an incompressible fluid is called
(a) streamline flow
(b) creeping flow
(c) shear flow
(d) potential flow
Answer:

Option (d)

33.
A velocity potential function exists only for
(a) steady flow
(b) uniform flow
(c) irrotational flow
(d) compressible flow
Answer:

Option (c)

34.
Existence of velocity potential function implies that the flow is
(a) steady
(b) uniform
(c) irrotational
(d) in continuum
Answer:

Option (c)

35.
If =x2-y2 is the velocity potential function in a 2-D flow field, then the magnitude of the velocity vector at point (1,1) would be
(a) o
(b) 4
(c) 8
(d) 2(2)0.5
Answer:

Option (d)

36.
A 2-D flow field is described by the velocity components u=2x and v=-2y. The corresponding velocity potential function would be
(a) ϕ=x2-y2
(b) ϕ=y2-x2
(c) ϕ=2x+y
(d) ϕ=x2+y2
Answer:

Option (a)

37.
The relation …...... For an irrotational flow is reffered as
(a) Euler's equation
(b) Laplace equation
(c) Reynolds equation
(d) Cauchy-Reimann's equation
Answer:

Option (b)

38.
In a free vortex motion, the radial component of velocity everywhere is
(a) maximum
(b) minimum
(c) zero
(d) non-zero and finite
Answer:

Option (c)

39.
In a forced vortex, the velocity of flow everywhere within the fluid is
(a) maximum
(b) minimum
(c) zero
(d) non-zero and finite
Answer:

Option (d)

40.
The flow of water through the hole in the bottom of a wash basin is an example of
(a) steady flow
(b) uniform flow
(c) free vortex
(d) forced vortex
Answer:

Option (c)

Showing 31 to 40 out of 48 Questions