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Theory of Machine

Theory of Machine
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)

√(3m/T)
√(T/3m)
T/3
(T.g)/3

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Theory of Machine
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

Unaffected of sensitivity
More sensitive
Less sensitive
Isochronous

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Theory of Machine
The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing)

r tanφ
(r/2) cosφ
r cosφ
r sinφ

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Theory of Machine
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

180° and 270°
45° and 225°
270° and 360°
90° and 180°

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Theory of Machine
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be

Maximum
Minimum
None of these
Zero

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Theory of Machine
In a kinematic chain, a quaternary joint is equivalent to

Three binary joints
Four binary joints
Two binary joints
One binary joint

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