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Strength of Materials Quiz | Strength of Materials MCQs with Answers

Questions
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
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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

Answer: parabola

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