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Theory of Machine

Theory of Machine
The cam and follower is an example of

Lower pair
Sliding pair
Higher pair
Rolling pair

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Theory of Machine
The balancing weights are introduced in planes parallel to the plane of rotation of the disturbing mass. To obtain complete dynamic balance, the minimum number of balancing weights to be introduced in different planes is

4
3
2
1

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Theory of Machine
In a reciprocating steam engine, which of the following forms a kinematic link?

Flywheel and engine frame
Crankshaft and flywheel
Cylinder and piston
Piston rod and connecting rod

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Theory of Machine
When two links are connected by a pin joint, their instantaneous center lies

On their point of contact
At the center of circle
At the pin joint
At the center of curvature

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Theory of Machine
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)

(1 - c).m.ω².r (cosθ - sinθ)
m.ω².r sinθ
m.ω².r (cosθ - sinθ)
m.ω².r cosθ

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Theory of Machine
In order to balance the reciprocating masses,

Secondary forces and couples must be balanced
Both (A) and (B)
None of these
Primary forces and couples must be balanced

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