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On what difference does the pneumatic system works?

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in Control Systems by (105k points)
On what difference does the pneumatic system works?

(a) Speed

(b) Pressure

(c) Area

(d) Length

The question was asked during an interview.

My question is based upon Classification of Control Systems in portion Control System and Components of Control Systems

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Correct option is (b) Pressure

To explain: A pneumatic system works due to pressure difference of air or any other gas. Air at a pressure, pi is injected through the input manifold. It also consists of mass, coefficient of viscous friction and spring constant and the pressure difference created due to that, gives rise to pneumatic system.

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