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Theory of Machine

Theory of Machine
Throw of a cam is the maximum distance of the follower from

Base circle
Root circle
Pitch circle
Prime circle

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Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

None of these
Longitudinal vibration
Torsional vibration
Transverse vibration

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Theory of Machine
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.

Sum
Product
Difference
Ratio

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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 = 90° + φ
α = 45° + φ/2
α = 90° - φ

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Theory of Machine
Efficiency of a screw jack is given by

tanα/tan (α +φ)
tan (α - φ)/tanα
tanα/tan (α - φ)
tan (α + φ)/tanα

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Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

n₁ + n₂ + 1
n₁ + n₂
n₁ + n₂ - 1
n₁ + n₂ - 2

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