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Mechanical Engineering Objective Questions { Engineering Mechanics }



43. The units of moment of inertia of mass are
A.Kg-m2
B.m4
C.Kg/m2
D.Kg/m

44. The units of moment of inertia of area are
A.Kg-m2
B.m4
C.Kg/m2
D.Kg/m

45. The possible loading in various members of framed structures are
A.Compression or tension
B.Buckling or shear
C.Shear or tension
D.All of the above

46. A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve
A.Catenary
B.Parabola
C.Hyperbola
D.Elliptical

47. A trolley wire weighs 1.2 kg per metre length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span
A.2.5 cm
B.3.0 cm
C.4.0 cm
D.5.0 cm

48. From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the c.g. of the remainder from the cen!re of circular plate
A.0.5 cm
B.1.0 cm
C.1.5 cm
D.2.5 cm

49. M.I. of a thin circular ring of radius r and mass M about an axis perpendicular to plane of ring is
A.Mr^2
B.(?r^4) /2
C.2/5 Mr^2
D.2/3 Mr^2

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