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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd3/16
πd3/32
πd4/32
πd4/64

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Engineering Mechanics
Whenever a force acts on a body and the body undergoes a displacement, then

None of these
Work is said to be done
Power is being transmitted
Body has kinetic energy of translation

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Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

2D/(D - d)
D/(D - d)
D/(D + d)
2D/(D + d)

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Engineering Mechanics
A screw jack used for lifting the loads is

A non-reversible machine
None of these
An ideal machine
A reversible machine

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Engineering Mechanics
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

Principle of independence of forces
None of these
Principle of transmissibility of forces
Principle of resolution of forces

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Engineering Mechanics
Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

None of these
Area of the triangle
Twice the area of the triangle
Half the area of the triangle

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