GATE BT 2021 BT Q13: Instrumentation and Process Control

The process and instrumentation diagram for a feedback control strategy to maintain the level (

) of a liquid by regulating a valve (

) in a tank is shown below.

is inlet liquid flow rate,

is outlet liquid flow rate,

is the liquid level transmitter,

is the liquid level controller,

is the setpoint value of the liquid level,

is the measured value of the liquid level and

is the valve pressure.

The manipulating variable(s) is/are

Your answerChoose one option.

only

and

only

and

only

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