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Theory of Machine

Theory of Machine
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

Working depth
Dedendum
Clearance
Addendum

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

95 mm
Slightly more than 95 mm
45 mm
Slightly less than 95 mm

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Theory of Machine
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

(r₁ - r₂) (y/x)
(r₁ + r₂) (y/x)
(r₁ + r₂) (x/y)
(r₁ - r₂) (x/y)

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Theory of Machine
The unbalanced force due to revolving masses

Varies in magnitude but constant in direction
Constant in magnitude and direction both
Varies in direction but constant in magnitude
Varies in magnitude and direction both

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Theory of Machine
The partial balancing means

All of these
Balancing partially revolving masses
Best balancing of engines
Balancing partially reciprocating masses

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Theory of Machine
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

None of the listed here
Fluctuation of energy
Maximum fluctuation of energy
Coefficient of fluctuation of energy

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