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Process Control and Instrumentation

Process Control and Instrumentation
Response of a linear control system for a change in set point is called

Regulator problem
Frequency response
Servo problem
Transient response

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Process Control and Instrumentation
When a bare thermocouple is covered by a protective sheath, the response becomes

Slower and oscillatory
Slower and non-oscillatory
Faster and non-oscillatory
Faster and oscillatory

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Process Control and Instrumentation
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

Kc is reduced
Integral control action is introduced
Kc is increased
Derivative control action is introduced

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Process Control and Instrumentation
__________ stability method uses open loop transfer function.

Mikhalov
Ruth
Nyquist
None of these

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Process Control and Instrumentation
Liquid levels in autocalves are measued by

None of these
Differential float type manometer
Simple float
Glass gauge

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Process Control and Instrumentation
Configuration of Bourdon spring tube is never made of __________ shape.

Spiral
Helical
Circular
Semi-circular

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