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Engineering :: Engineering Mechanics


41.  The forces, whose lines of action are parallel to each other and act in the same directions, are known as
A. coplaner concurrent forces B. coplaner non-concurrent forces
C. like parallel forces D. unlike parallel forces

42.  The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as
A. coplaner concurrent forces B. coplaner non-concurrent forces
C. like parallel forces D. unlike parallel forces

43.  Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. If the line of action of the resultant is 6 mm from any given force the two forces are
A. 15 N and 5 N B. 20 N and 5 N
C. 15 N and 10 N D. none of these

44.  A smooth cylinder lying on its convex surface remains in
A. stable B. unstable
C. neutral

45.  Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to
A. area of the triangle B. twice the area of the triangle
C. half the area of the triangle D. none of these

46.  The principle of transmissibility of forces states that, when a force acts upon a body, its effect is
A. same at every point on its line of action B. different at different points on its line of action
C. minimum, if it acts at the centre of gravity of the body D. maximum, if it acts at the centre of gravity of the body

47.  A smooth cylinder lying on a
A. curved surface B. convex surface
C. horizontal surface

48.  If three forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, the forces shall be in equilibrium.
A. TRUE B. False

49.  Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces
A. Correct B. Incorrect

50.  Two equal and opposite parallel forces whose lines of action are different form a couple.
A. Right B. Wrong




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