Explain the working of Watt governor with neat diagram.
Theory
Draw turning moment diagram for single cylinder four stroke I.C. Engine. Label all parts.
Explain with neat sketch how to find the velocity of a slider in slider crank mechanism by Klein’s construction.
State effects of imbalance in machine.
Effects of imbalance in machine
1. Imbalance imparts vibratory motion to the frame of the machine.
2. Produces noise which leads to human discomfort.
3. Detrimental effects on the machine performance & structural integrity of the machine foundation.
Explain the working of Whitworth quick return mechanism.
Define uniform wear theory and uniform pressure theory.
Uniform Wear theory:
When the product of pressure and area of the contacting surface transmitting load is taken as constant to determine the axial force & torque, it is termed as uniform wear theory as it is assumed that wear along the surface is uniform.
Differentiate between mechanism and machine.
Explain the working of freewheel mechanism of bicycle with sketch.
A freewheel mechanism on a bicycle allows the rear wheel to turn faster than the pedals. If there is no freewheel on a bicycle, a simple ride could be exhausting, because one could never stop pumping the pedals. And going downhill would be downright dangerous, because the pedals would turn on their own, faster than one could keep up with them.
State the meaning of sliding pair, turning pair, rolling pair and spherical pair with one example each.
Draw the neat sketch of single plate clutch and explain its working.
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