Fluid Mechanics & Hydraulics (3140611) MCQs

MCQs of Fluid Kinematics & Dynamics

Showing 1 to 10 out of 48 Questions
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1.
Which of the following is an example of laminar flow?
(a) Under ground flow
(b) Flow past tiny bodies
(c) The flow of oil in measuring instruments
(d) all of these
Answer:

Option (d)

2.
The flow in a pipe is laminar when Reynold number is
(a) less than 2000
(b) between 2000 and 4000
(c) more than 4000
(d) none of these
Answer:

Option (a)

3.
The flow in a pipe is neither laminar nor turbulent when Reynold number is
(a) less than 2000
(b) between 2000 and 4000
(c) more than 4000
(d) none of these
Answer:

Option (b)

4.
The flow in a pipe is turbulent when Reynold number is
(a) less than 2000
(b) between 2000 and 4000
(c) more than 4000
(d) none of these
Answer:

Option (c)

5.
The flow in which conditions do not change with time at any point is known as
(a) 1-D flow
(b) steady flow
(c) streamline flow
(d) uniform flow
Answer:

Option (b)

6.
When the flow parameters at any given instant remain same at every point, then flow is said to be
(a) steady
(b) laminar
(c) uniform
(d) incompressible
Answer:

Option (c)

7.
During the opening of a valve in a pipeline, the flow is
(a) steady
(b) unsteady
(c) uniform
(d) laminar
Answer:

Option (b)

8.
Uniform flow occurs when
(a) the flow is streamline
(b) size and shape of the cross-section in a particular length remain constant
(c) size and cross-section changes uniformly along the length
(d) flow occurs at a constant rate
Answer:

Option (b)

9.
A flow through a long pipe at constant rate is called
(a) steady uniform flow
(b) steady non-uniform flow
(c) unsteady uniform flow
(d) unsteady non-uniform flow
Answer:

Option (a)

10.
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
Answer:

Option (c)

Showing 1 to 10 out of 48 Questions
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