Q. On-Off controllers are normally used for

A
low loads
B
temperature changes
C
flow rate changes
D
none of these
Solution:

On-Off control is the simplest form of feedback control. An on-off controller simply drives the manipulated variable from fully closed to fully open depending on the position of the controlled variable relative to the setpoint. A common example of on-off control is the temperature control in a domestic heating system.

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