Mechanical Engineering MCQs

Page No. 25

Principle of similitude forms the basis of_________________?


acomparing two identical equipments


bdesigning models so that the result can be converted to prototypes


ccomparing similarity between design and actual equipment


dhydraulic designs



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


africtional force


bviscosity


csurface friction


dall of the above


View Answer all of the above

Froude number is significant in__________________?


asupersonics, as with projectile and jet propulsion


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


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


dall of the above



The equation of continuity holds good when the flow____________________?


ais steady


bis one dimensional


cvelocity is uniform at all the cross sections


dall of the above


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


buniform flow


csteady flow


dturbulent flow


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


buniform flow


csteady flow


dstreamline flow


View Answer streamline flow

Steady flow occurs when___________________?


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


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


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


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



Uniform flow occurs when ___________________?


athe flow is steady


bthe flow is streamline


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


dsize and cross section change uniformly along length



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


aorifice plate


bventuri


crotameter


dpitot tube


View Answer pitot tube

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


avertical line


bhorizontal line


cinclined line with flow downward


din any direction and in any location



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