What is machine ? Differentiate between a machine and a structure.
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Explain a scotch yoke mechanism with a neat sketch.
State any four inversions of single slider crane chain. Describe any one with neat sketch.
1.Reciprocating engine, Reciprocating compressor;
2. Whitworth quick return mechanism, Rotary engine,
3.Slotted crank mechanism, Oscillatory engine.
4.Hand pump, pendulum pump.
1.Reciprocating engine, Reciprocating compressor link 1 is fixed
2.Whitworth quick return mechanism, Rotary engine link 2 is fixed,
Name different mechanisms generated from a single slider crank chain.
Different mechanism generated by single slider crank chain mechanism.
a) Reciprocating engine, Reciprocating compressor
b) Whitworth quick return mechanism, Rotary engine,
c) Slotted crank mechanism, Oscillatory engine
d) Hand pump, pendulum pump or Bull engine
Define Kinematic link with one example.
Kinematic link --Each part of a machine, which moves relative to some other part, is known as a ‘kinematic link (or simply link) or element. Example – any one Example of machine element, (e.g. shaft, spindle, gear, crank, belt, pulley, key etc. )
Draw a neat sketch of Oldham’s coupling and explain the working of it.
Explain the working of Whitworth quick return mechanism.
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.
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