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Theory of Machine

Theory of Machine
The velocity of a body moving with simple harmonic motion is __________ at the mean position.

Minimum
Maximum
Zero
None of these

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Theory of Machine
The number of links and instantaneous centers in a reciprocating engine mechanism are

5, 4
4, 6
4, 5
4, 4

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)

v²BA /AB
vBA × AB
vBA /AB
v²BA

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Theory of Machine
Length of arc of contact is given by

Arc of approach / Arc of recess
Arc of approach + Arc of recess
Arc of approach × Arc of recess
Arc of approach - Arc of recess

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Theory of Machine
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to

Ensure proper alignment
Reduce vibration
Ensure uniform loading
Reduce slip

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Theory of Machine
The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

ω². (r₁ + r₂). (1 + cos² θ)
ω². (r₁ - r₂). (1 - sin² θ)
ω². (r₁ + r₂). [(2 - cos² θ)/cos³ θ]
ω². (r₁ r₂). (1 - cos² θ)

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