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Engineering Mechanics - Interview Questions and Answers

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21. 46. Centre 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.
Explanation:
22. 43. In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than
A. two members with unknown forces of the frame
B. three members with unknown forces of the frame
C. four members with unknown forces of the frame
D. three members with known forces of the frame
E. four members with two known forces.
Explanation:
23. 4. Forces are called concurrent when their lines of action meet in
A. one point
B. two points
C. plane
D. perpendicular planes
E. different planes.
Explanation:
24. 28. 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.
Explanation:
25. 48. The units of moment of inertia of an area are
A. kg m2
B. m4
C. kg/m2
D. m3
E. kg/m4.
Explanation:
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