Cascade control is
(A) The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller
(B) Used when changes in process conditions cause serious upsets in the controlled variable
(C) Useful to control flow from temperature
(D) All 'a', 'b' & 'c'
(A) The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller
(B) Used when changes in process conditions cause serious upsets in the controlled variable
(C) Useful to control flow from temperature
(D) All 'a', 'b' & 'c'