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Process Control and Instrumentation

Process Control and Instrumentation
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

Triangular
Ordinary
Log-lag
Semi-log

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Process Control and Instrumentation
Psychrometer determines the

Water of crystallisation
Hygroscopic nature of solids
Humidity of gases
Moisture content of solids

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Process Control and Instrumentation
Which of the following thermocouples has the least temperature measurement range?

Chromel-alumel
Platinum-platinum/rhodium
Iron-constantan
Copper-constantan

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Process Control and Instrumentation
The closed loop pole of a stable second order system could be

Both real and positive
Both real and negative
One real positive and the other real negative
Complex conjugate with positive real parts

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Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Introducing integral control
Introducing derivative control
None of these
Reducing value of Kc

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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
Derivative control action is introduced
Kc is increased

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