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Theory of Machine

Theory of Machine
The locus of a point on a thread unwound from a cylinder will be

Cycloidal
Involute
A circle
A straight line

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Theory of Machine
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)

(S₁ + S₂) / h
(S₁ - S₂) / h
(S₁ + S₂) / 2h
(S₁ - S₂) / 2h

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Theory of Machine
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

Same as the first one
One fourth of the first one
Four times the first one
One and a half times the first one

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Theory of Machine
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

Double
Two-third
One-third
Three times

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Theory of Machine
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)

P = W (cos α + μ sin α)
P = W tan (α + φ)
P = W (sin α + μ cos α)
P = W tan α

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Theory of Machine
For fluctuating loads, well suited bearing is

Ball bearing
Needle roller bearing
Roller bearing
Thrust bearing

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