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Process Control and Instrumentation

Process Control and Instrumentation
Continuous measurement of moisture in paper is done by

Sling psychrometer
Hair-hygrometer
Weighing
High resistance Wheatstone's bridge circuit

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Process Control and Instrumentation
Non-metallic diaphragm used as pressure sensor in instruments is generally made of

Synthetic rubber
Bakelite
Teflon
Thick paper

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

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

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

Ruth
Mikhalov
None of these
Nyquist

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Chromel-constantan
All of these
Platinum-platinum + rhodium
Iron-constantan

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Process Control and Instrumentation
In an exothermic chemical reactor, the manipulated variable is the flow rate of

None of these
Coolant
Reactants
Product

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