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Engineering :: Engineering Mechanics


51.  A couple produces
A. translatory motion B. rotational motion
C. combined translatory and rotational motion D. none of the above

52.  Which of the following statement is correct?
A. The algebraic sum of the forces, constituting the couple is zero. B. The algebraic sum of the forces, constituting the couple, about any point is the same.
C. A couple cannot be balanced by a single force but can be balanced only by a couple of opposite sense D. all of the above

53.  The point, through which the whole weight of the body acts, irrespective of its position, is known as
A. moment of inertia B. centre of gravity
C. centre of percussion D. centre of mass

54.  The term 'centroid' is
A. the same as centre of gravity B. the point of suspension
C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis D. none of the above

55.  An irregular body may have more than one centre of gravity.
A. Yes B. No

56.  The centre of gravity of a rectangle lies at a point where its two diagonals meet each other.
A. Agree B. Disagree

57.  The centre of gravity of a triangle lies at a point where its medians intersect each other.
A. True B. False

58.  The centre of gravity of an equilateral triangle with each side a, is
A. ?3 a/2 B. 2?3 a
C. a/2 ?3 D. 3?2 a

59.  The centre of gravity of a semi-circle lies at a distance of
A. 3r/8 B. 4r/3?
C. 8r / 3 D. 3r / 4?

60.  The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius.
A. Right B. Wrong




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