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Theory of Machine

Theory of Machine
The maximum value of the pressure angle in case of cam is kept as

10°
14°
30°
20°

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Theory of Machine
A point on a link connecting double slider crank chain traces a

Circle
Ellipse
Parabola
Hyperbola

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Theory of Machine
The Hooke's joint consists of:

One fork
Three forks
Two forks
Four forks

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Theory of Machine
A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

None of these
m₁ r₁ = m₂ r₂
m₁ r₂ = m₂ r₁
m₁ m₂ = r₁ r₂

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Theory of Machine
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

α = 45° + φ/2
α = 45° - φ/2
α = 90° - φ
α = 90° + φ

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

cosφ
sinφ
cosecφ
secφ

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MORE MCQ ON Theory of Machine

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