Answer Posted / rajesh.

Potential contact means voltage is present on the point. As and when this point is make contact with another point the current will pass and circuit will draw current to load. Example relay contacts, electrical contactors etc.

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please tell me what is a light up procedure of Cfbc boiler and what it's axuillaries of cfbc boiler?

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1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.

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If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?

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State four different types of flow measurement, for gas flow measurement MMSCFD is the common unit expand the unit and specify significance of word S in the unit.

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