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Free download in PDF Strength of Materials MCQs with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
101
If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella
[A]
more inclined when moving
[B]
less inclined when moving
[C]
more inclined when standing
[D]
less inclined when standing
Answer: less inclined when standing
102
Limiting force of friction is the
[A]
tangent of angle between normal-reaction and the resultant of normal reaction and limiting friction
[B]
ratio of limiting friction and normal reaction
[C]
the friction force acting when the body is just about to move
[D]
the friction force acting when the body is in motion
Answer: the friction force acting when the body is just about to move
103
Coulomb friction is the friction between
[A]
bodies having relative motion
[B]
two dry surfaces
[C]
two lubricated surfaces
[D]
solids and liquids
Answer: bodies having relative motion
104
Tangent of angle of friction is equal to
[A]
kinetic friction
[B]
limiting friction
[C]
angle of repose
[D]
coefficient of friction
Answer: coefficient of friction
105
Kinetic friction is the
[A]
tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction
[B]
ratio of limiting friction and normal reaction
[C]
the friction force acting when the body is just about to move
[D]
the friction force acting when the body is in motion
Answer: the friction force acting when the body is in motion
106
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
[A]
remain horizontal
[B]
slant up towards direction of pull
[C]
slant down towards direction of pull
[D]
None of the above
Answer: slant down towards direction of pull
107
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
[B]
constant
[C]
both of above are correct
[D]
both of above are wrong
Answer: equal to the moment of the couple
108
A single force and a couple acting in the same plane upon a rigid body
[A]
balance each other
[B]
cannot balance each other
[C]
produce moment of a couple
[D]
are equivalent
Answer: cannot balance each other
109
If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either
[A]
meet in a point
[B]
be all parallel
[C]
at least two of them must meet
[D]
all the above are correct
Answer: all the above are correct
110
A cable with a uniformly distributed load per horizontal metre run will take the following shape
[A]
straight line
[B]
parabola
[C]
hyperbola
[D]
elliptical
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