Mechanical Engineering MCQs

Page No. 25

Principle of similitude forms the basis of_________________?


acomparing two identical equipments

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bdesigning models so that the result can be converted to prototypes

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ccomparing similarity between design and actual equipment

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dhydraulic designs

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In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than_______________?


africtional force

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bviscosity

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csurface friction

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dall of the above

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View Answer all of the above

Froude number is significant in__________________?


asupersonics, as with projectile and jet propulsion

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bfull immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

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csimultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls

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dall of the above

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The equation of continuity holds good when the flow____________________?


ais steady

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bis one dimensional

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cvelocity is uniform at all the cross sections

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dall of the above

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View Answer all of the above

The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as________________?


aone dimensional flow

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buniform flow

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csteady flow

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dturbulent flow

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View Answer uniform flow

The flow in which each liquid particle has a definite path and their paths do not cross each other is called__________________?


aone dimensional flow

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buniform flow

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csteady flow

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dstreamline flow

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View Answer streamline flow

Steady flow occurs when___________________?


athe direction and magnitude of the velocity at all points are identical

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bthe velocity of successive fluid particles, at any point, is the same at successive periods of time

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cthe magnitude and direction of the velocity do not change from point to point in the fluid

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dthe fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

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Uniform flow occurs when ___________________?


athe flow is steady

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bthe flow is streamline

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csize and shape of the cross section in a particular length remain constant

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dsize and cross section change uniformly along length

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Flow of water in a pipe about 3 metres in diameter can be measured by__________________?


aorifice plate

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bventuri

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crotameter

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dpitot tube

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View Answer pitot tube

For measuring flow by a venturimeter, if should be installed in __________________?


avertical line

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bhorizontal line

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cinclined line with flow downward

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din any direction and in any location

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