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Theory of Machine

Theory of Machine
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from

30°-40°
15°-25°
10°-15°
25°-30°

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Theory of Machine
If some links are connected such that motion between them can take place in more than one direction, it is called

Completely constrained motion
Partially constrained motion
Successfully constrained motion
Incompletely constrained motion

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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)
All of these
I.ω².CS
2.E.CS

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Theory of Machine
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₁.D₂
D₂/D₁
D₁
D₁/D₂

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Theory of Machine
Cross head and guides form a

Turning pair
Lower pair
Higher pair
Sliding pair

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Theory of Machine
If the damping factor for a vibrating system is unity, then the system will be

Under damped
Over damped
Critically damped
Without vibrations

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