Latest Fluid Mechanics objective questions and answers for competitive exams & interviews. Useful for freshers, students preparing for semester exams and MTech Preparation.
a) 4/3
b) 3/2
c) 9/4
d) 27/8
Ans: c
42. The continuity equation
pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid
a) steady flow
b) uniform flow
c) incompressible flow
d) frictionless flow
where pi and p2 are mass densities.
Ans: a
44. Which of the following velocity potentials satisfies continuity equation ?
a) x2y
b) x2-y2
c) cosx
d) x2 + y2
Ans: b
46. The motion of air mass in a tornado is a
a) free vortex motion
b) forced vortex motion
c) free vortex at centre and forced vortex outside
d) forced vortex at centre and free vortex outside
Ans: d
47. In a forced vortex motion, the velocity of flow is
a) directly proportional to its radial distance from axis of rotation
b) inversely proportional to its radial distance from the axis of rotation
c) inversely proportional to the square of its radial distance from the axis of rotation
d) directly proportional to the square of its radial distance from the axis of rotation
Ans: a
48. Stream lines and path lines always coincide in case of
a) steady flow
b) laminar flow
c) uniform flow
d) turbulent flow
Ans: a
49. For laminar flow in circular pipes, the Darcy's friction factor f is equal to
a) 16/Re
b) 32/ Re
c) 64/ Re
d) none of the above where R,, is Reynolds number.
Ans: c
50. Surge wave in a rectangular channel is an example of
i) steady flow
ii) unsteady flow
iii) uniform flow
iv) non-uniform flow
The correct answer is
a) (i) and (iii)
b) (ii) and (iii)
c) (i) and (:v)
d) (ii) and (iv)
Ans: d
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Fluid Mechanics Multiple choice Questions Part9
Fluid Mechanics Objective type Questions and Answers List
41. If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy isa) 4/3
b) 3/2
c) 9/4
d) 27/8
Ans: c
42. The continuity equation
pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid
a) steady flow
b) uniform flow
c) incompressible flow
d) frictionless flow
where pi and p2 are mass densities.
Ans: a
44. Which of the following velocity potentials satisfies continuity equation ?
a) x2y
b) x2-y2
c) cosx
d) x2 + y2
Ans: b
46. The motion of air mass in a tornado is a
a) free vortex motion
b) forced vortex motion
c) free vortex at centre and forced vortex outside
d) forced vortex at centre and free vortex outside
Ans: d
47. In a forced vortex motion, the velocity of flow is
a) directly proportional to its radial distance from axis of rotation
b) inversely proportional to its radial distance from the axis of rotation
c) inversely proportional to the square of its radial distance from the axis of rotation
d) directly proportional to the square of its radial distance from the axis of rotation
Ans: a
48. Stream lines and path lines always coincide in case of
a) steady flow
b) laminar flow
c) uniform flow
d) turbulent flow
Ans: a
49. For laminar flow in circular pipes, the Darcy's friction factor f is equal to
a) 16/Re
b) 32/ Re
c) 64/ Re
d) none of the above where R,, is Reynolds number.
Ans: c
50. Surge wave in a rectangular channel is an example of
i) steady flow
ii) unsteady flow
iii) uniform flow
iv) non-uniform flow
The correct answer is
a) (i) and (iii)
b) (ii) and (iii)
c) (i) and (:v)
d) (ii) and (iv)
Ans: d
Read More:-
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Fluid Mechanics Multiple choice Questions Part5
Fluid Mechanics Multiple choice Questions Part6
Fluid Mechanics Multiple choice Questions Part7
Fluid Mechanics Multiple choice Questions Part8
Fluid Mechanics Multiple choice Questions Part9
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