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Theory of Machine

Theory of Machine
The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

l = 2p - 3
l = 2p - 5
l = 2p - 2
l = 2p - 4

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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

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

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Theory of Machine
The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

To raise the bow and lower the stern
To lower the bow and stern
To raise the bow and stern
To raise the stern and lower the bow

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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
Isochronous
Less sensitive
More sensitive

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Theory of Machine
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

cos (θ + φ) + 1/ cos (θ - φ) + 1
cos (θ - φ) + 1/ cos (θ + φ) + 1
cos (θ - φ) + 1/ sin (θ + φ) + 1
sin (θ + φ) + 1/ cos (θ - φ) + 1

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Theory of Machine
Maximum fluctuation of energy in a flywheel is equal to [where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, CS = Coefficient of fluctuation of speed, and ω = Mean angular speed = (ω₁ + ω₂)/2]

I.ω.(ω₁ - ω₂)
2.E.CS
I.ω².CS
All of these

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MORE MCQ ON Theory of Machine

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