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

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Applied Mechanics and Graphic Statics
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The velocity ratio of the lifting machine is

65
60
50
55

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Applied Mechanics and Graphic Statics
A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A. Neglecting the weight of the rod, the point at which the rod will balance is

125.5 mm from A
109.5 mm from A
119.5 mm from A
132.5 mm from A

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Applied Mechanics and Graphic Statics
When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as

Imaginary work
None of these
Negative work
Virtual work

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Applied Mechanics and Graphic Statics
The C.G. of a right circular cone lies on its axis of symmetry at a height of

h/2
h/3
h/4
h/5

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Applied Mechanics and Graphic Statics
A satellite is said to move in a synchronous orbit if it moves at an altitude of 36,000 km with a maximum velocity of about

11,000 km per hour
8000 km per hour
7000 km per hour
9000 km per hour

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