Civil Engineering MCQs

Page No. 211

Tangent of angle of friction is equal to_________________?


akinetic friction

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blimiting friction

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c angle of repose

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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 + )

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dWsin(a + )

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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/%

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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

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dare equivalent

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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

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View Answer limiting friction

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


acoplanar

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bmeet at one point ;

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cboth A. and B. above

✓


dall be equal

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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

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b2j-l

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c 2/-3

✓


d3/-2

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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

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bkcal

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cwattr

✓


dwatt hours

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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

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dmetal is twice as dense as unknown fluid

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