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Theory of Machine

Theory of Machine
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be

Stable
Isochronous
Unstable
Hunt

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Theory of Machine
The Whitworth quick return motion mechanism is formed in a slider crank chain when the

Smallest link is a fixed link
Longest link is a fixed link
Coupler link is fixed
Slider is a fixed link

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Theory of Machine
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

α = 90° - φ
α = 45° + φ/2
α = 90° + φ
α = 45° - φ/2

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Theory of Machine
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt) + (s/m). x = 0. If the roots of this equation are real, then the system will be

Under damped
Over-damped
Critically damped
Without vibrations

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Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

n₁ + n₂ + 1
n₁ + n₂ - 2
n₁ + n₂
n₁ + n₂ - 1

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Theory of Machine
Which of the following disciplines provides study of relative motion between the parts of a machine?

Theory of machines
Applied mechanics
Kinematics
Mechanisms

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