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Theory of Machine

Theory of Machine
Rectilinear motion of piston is converted into rotary by

Slider crank
Connecting rod
Cross head
Gudgeon pin

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Theory of Machine
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

c (m - M) g
c/(m + M) g
c/(m - M) g
c (m + M) g

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Theory of Machine
The maximum or minimum value of the swaying couple is

± (a/√2) (1 - c) m.ω².r
± 2a (1 - c) m.ω².r
± c.m.ω².r
± a (1 - c) m.ω².r

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Theory of Machine
If two moving elements have surface contact in motion, such pair is known as

Rolling pair
Sliding pair
Higher pair
Surface pair

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

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Theory of Machine
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

cosecφ
sinφ
secφ
cosφ

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MORE MCQ ON Theory of Machine

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