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Process Control and Instrumentation

Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

-1
1
∞

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Volts
Millivolts
Kilo volts
Microvolts

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Process Control and Instrumentation
Presence of a small amount of water in the organic systems can be determined by the __________ method.

Electrical conductivity
Dielectric constant end loss factor
Polarimetry
Emission spectroscopy

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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

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

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Process Control and Instrumentation
Which of the following is the dynamic characteristics of an instrument?

Sensitivity
Reproducibility
Dead zone
Fidelity

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Process Control and Instrumentation
What is the dynamic error in a critically damped second order instrument for a ramp input (AT)?

√AT
1.5 AT
2 AT
0.5 AT

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