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Theory of Machine

Theory of Machine
Cylindrical cams can be classified as

Reciprocating
Tangent
Circular
None of these

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Theory of Machine
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

None of these
Both governors A and B are equally sensitive
Governor A is more sensitive than governor B
Governor B is more sensitive than governor A

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Theory of Machine
A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a

Inversion
Mechanism
Structure
Kinematic chain

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Theory of Machine
The instantaneous centers which vary with the configuration of mechanism are called

Permanent instantaneous centers
None of these
Neither fixed nor permanent instantaneous centers
Fixed instantaneous centers

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Theory of Machine
Transmission angle is the angle between

Output link and fixed link
Input link and fixed link
Output link and coupler
Input link and coupler

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the anticlockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂) 2r
(ω₁ + ω₂) r
(ω₁ - ω₂) r
ω₁.ω₂.r

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