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Which of the following is not a type of Automatic control system?

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+1 vote
in Fermentation Technology by (72.1k points)
Which of the following is not a type of Automatic control system?

(a) Integral controls

(b) Derivative controls

(c) Proportional controls

(d) Displacement control

This question was addressed to me during a job interview.

Origin of the question is Instrumentation and Control topic in section Instrumentation and Control of Fermentation Technology

1 Answer

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Best answer
Right choice is (d) Displacement control

Explanation: Automatic controls are classified into four types: Integral controls, Derivatives controls, Proportional controls, Two-position controls. Displacement is not a type of control.

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