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Theory of Machine

Theory of Machine
Ackermann steering gear consists of

Higher pairs
Sliding pairs
Rolling pairs
Turning pairs

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

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

1.4 N-s/m
529.2 N-s/m
18.52 N-s/m
52.92 N-s/m

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Theory of Machine
In a pantograph, all the pairs are

Sliding pairs
Self-closed pairs
Turning pairs
Spherical pairs

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Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Not exist
Depend on position of crank
None of these
Exist

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Theory of Machine
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Screw pair
Spherical pair
Turning pair
Sliding pair

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