Civil Engineering MCQs

Page No. 213

The C.G. of a plane lamina will not be at its geometrical centre in the case of a______________?


a right angled triangle


bequilateral triangle


csquare


dcircle



Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one________________?


aellipse


bhyperbola


cparabola


dcircle


View Answer hyperbola

If three forces acting in different planes can be represented by a triangle, these will be in________________?


anon-equilibrium


b partial equilibrium


c full equilibrium


dunpredictable


View Answer non-equilibrium

The co-efficient of friction depends upon________________?


a nature of surfaces


barea of contact


c shape of the surfaces


dail of the above.


View Answer nature of surfaces

If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either__________________?


ameet in a point


bbe all parallel


cat least two of them must meet


dall the above are correct



The algebraic sum of moments of the forces forming couple about any point in their plane is________________?


a equal to the moment of the couple


bconstant


cboth of above are correct


dboth of above are wrong



A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?


aremain horizontal


b slant up towards direction of pull


cslant down towards direction of pull


dunpredictable



Kinetic friction is the________________?


atangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction


bratio of limiting friction and normal reaction


cthe friction force acting when the body is just about to move


d the friction force acting when the body is in motion



Dynamic friction as compared to static friction is________________?


asame


bmore


cless


dmay be less of more depending on nature of surfaces and velocity


View Answer less

If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella_________________?


amore inclined when moving


b less inclined when moving


cmore inclined when standing


dless inclined when standing



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