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Theory of Machine

Theory of Machine
A pulley and belt in a belt drive form a

Cylindrical pair
Turning pair
Sliding pair
Rolling pair

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

95 mm
Slightly less than 45 mm
45 mm
Slightly more than 45 mm

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² (R - r₁) sinθ
ω² (R - r₁) cosθ
ω² r₁ sinθ
ω² R cosθ

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Theory of Machine
The unbalanced primary forces in a reciprocating engine are

Balanced completely
Balanced partially
Balanced by secondary forces
Not balanced

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

μ W R cosecα
(3/4) μ W R cosecα
(2/3) μ W R cosecα
(1/2) μ W R cosecα

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

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

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