Civil Engineering MCQs

Page No. 211

Tangent of angle of friction is equal to_________________?


akinetic friction


blimiting friction


c angle of repose


dcoefficient of friction



The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to_________________?


aWtan(a + )


bWtan(a-)


cWcos(a + )


dWsin(a + )


View Answer Wtan(a + )

A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of__________________?


a r/2


br/A


cr/%


d 0.134 r


View Answer 0.134 r

A single force and a couple acting in the same plane upon a rigid body________________?


a balance each other


bcannot balance each other


cproduce moment of a couple


dare equivalent



The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?


a limiting friction


b sliding friction


crolling friction


dkinematic friction


View Answer limiting friction

The necessary condition for forces to be in equilibrium is that these should be_______________?


acoplanar


bmeet at one point ;


cboth A. and B. above


dall be equal


View Answer both A. and B. above

If n = number of members andy = number of joints, then for a perfect frame, n =_______________?


a j-2


b2j-l


c 2/-3


d3/-2


View Answer 2/-3

A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to______________?


a25


b50


c100


d250


View Answer 50

Which of the following is not the unit of energy________________?


akg m


bkcal


cwattr


dwatt hours


View Answer wattr

A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal________________?


a density of metal can’t be determined


bmetal is twice as dense as water


cmetal will float in water


dmetal is twice as dense as unknown fluid



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