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.Management Sciences
Category: Engineering Mechanics
The product of either force of couple with the arm of the couple is called_________________?
A. resultant couple
B. moment of the forces
C. resulting couple
D. moment of the couple
E. none of the above
A pair of smith’s tongs is an example of the lever of__________________?
A. zeioth order
B. first order
C. second order
D. third order
E. fourth order
Center of percussion is___________________?
A. the point of C.G.
B. the point of metacentre
C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
D. point of suspension
E. the point in a body about which it can rotate horizontally and oscillate under the influence of gravity
Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction___________________?
A. along the plane
B. horizontally
C. vertically
D. at an angle equal to the angle of friction to the inclined plane
E. unpredictable
Two non-collinear parallel equal forces acting in opposite direction__________________?
A. balance each other
B. constitute a moment
C. constitute a couple
D. constitute a moment of couple
E. constitute a resultant couple
Tangent of angle of friction is equal to__________________?
A. kinetic friction
B. limiting friction
C. angle of repose
D. coefficient of friction
E. friction force
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
C. rolling friction
D. kinematic friction
E. dynamic friction
The C.G. of a solid hemisphere lies on the central radius 3r________________?
A. at distance — from the plane base 3r
B. at distance — from the plane base 3r
C. at distance — from the plane base 3r
D. at distance — from the plane base or
E. at distance — from the plane base
Which of the following is not the unit of power ?
A. kW (kilowatt)
B. hp (horse power)
C. kcal/sec
D. kg m/sec
E. kcal/kg sec
According to principle of moments__________________?
A. if a system of coplanar forces is in equilibrium, then their algebraic sum is zero
B. if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero
C. the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point
D. positive and negative couples can be balanced
E. none of the above
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