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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
The condilion for a lifting machine to be reversible is that its efficiency should be

more than 50%
equal to 100%
more than 66.67%
less than 50%

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Applied Mechanics and Graphic Statics
Centre of gravity of a thin hollow cone lies on the axis of symmetry at a height of

One-third of the total height above base
None of these
One-fourth of the total height above base
One-half of the total height above base

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Applied Mechanics and Graphic Statics
The ratio of the ranges on the inclined plane with motion upward and with motion downward for a given velocity, angle of projection will be

sin (α + β)/sin (α - β)
tan (α - β)/tan (α + β)
sin (α - β)/sin (α + β)
cos (α - β)/cos (α + β)

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Applied Mechanics and Graphic Statics
Coefficient of friction depends on

Nature of surfaces only
None of these
Both (A) and (B)
Area of contact only

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Applied Mechanics and Graphic Statics
A weight of 100 kg is supported by a string whose ends are attached to pegs ‘A’ and ‘B’ at the same level shown in below figure. The tension in the string is

50 kg
120 kg
750 kg
100 kg

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Applied Mechanics and Graphic Statics
A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a

Cycloid
Ellipse
Catenary
Parabola

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