MCQs of Motion of Fluid Particles and Streams (Fluid Mechanics and Hydraulic Machines - 3141906)

Fluid Mechanics and Hydraulic Machines (3141906) MCQs

MCQs of Motion of Fluid Particles and Streams

Showing 21 to 30 out of 42 Questions

21.

A streamline is a line

(a)	connecting midpoints of a flow cross-section
(b)	connecting points of equal velocity in a flow field
(c)	tangent to which at any point dives the direction of the velocity vector at that point
(d)	drawn normal to the velocity vector at any point

22.

The path traced by a single particle of smoke issuing from a cigarette is a

(a)	stream line
(b)	streak line
(c)	path line
(d)	flow line

23.

Which of the following represents steady uniform flow?

(a)	flow through a diverging duct at a constant rate
(b)	flow through a diverging duct at any increasing rate
(c)	flow through a long pipe at a constant rate
(d)	flow through a long pipe at decreasing rate

24.

A steady irrotational flow of an incompressible fluid is called

(a)	streamline flow
(b)	creeping flow
(c)	shear flow
(d)	potential flow

25.

During motion, a fluid element is stated to undergo a change in angle between two adjacent sides when it moves from one place to another. This type of motion is called

(a)	linear deformation
(b)	angular deformation
(c)	rotation
(d)	circulatory motion

26.

The component of acceleration due to non-uniformity of flow is called

(a)	normal acceleration
(b)	tangential acceleration
(c)	convective acceleration
(d)	local acceleration

27.

Local acceleration in fluid flow is due to

(a)	unsteady nature of the flow
(b)	non-uniformity of flow
(c)	turbulence in the flow
(d)	irrotational nature of the flow

28.

A stream function

(a)	is defined only for steady and incompressible flow.
(b)	is a mathematical function which has no physical equivalent.
(c)	may not remain constant for a streamline.
(d)	satisfies the Laplace equation for rotational motion.

29.

ψ = x^{2} - y^{2}

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)	$2 \sqrt{2}$

30.

A velocity potential function exists only for

(a)	steady flow
(b)	uniform flow
(c)	irrotational flow
(d)	compressible flow

Showing 21 to 30 out of 42 Questions