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Theory of Machine

Theory of Machine
If the opposite links of a four bar linkage are equal, the links will always form a

Parallelogram
Rectangle
Pentagon
Triangle

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Theory of Machine
One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)

2π. √(g/δ)
1/2π. √(δ/g)
1/2π. √(g/δ)
2π. √(δ/g)

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Theory of Machine
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

Increases
None of these
Decreases
Remain same

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Theory of Machine
The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

To raise the bow and lower the stern
To raise the bow and stern
To lower the bow and stern
To raise the stern and lower the bow

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Theory of Machine
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Universal coupling
Flexible coupling
Oldham's coupling
Chain coupling

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Theory of Machine
For the same lift and same angle of ascent, a smaller base circle will give

A small value of pressure angle
Something else
There is no such relation with pressure angle
A large value of pressure angle

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