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Process Control and Instrumentation

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

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

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Process Control and Instrumentation
Thermocouple in a thermal well behaves as a true

Second order system (underdamped)
Second order system (overdamped)
Multiple first order system
First order system

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Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of __________ is < 1.

Second order system
Transportation lag
None of these
First order system

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Process Control and Instrumentation
Hot wire anemometer is used for the measurement of

Flow rates of fluids
Very high temperature
Flow rates of granular solids
Thermal conductivity of gases

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Process Control and Instrumentation
Instrumentation in a plant offers the advantage of

All of these
Greater safety of operation
Better quality of product
Greater operation economy

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Process Control and Instrumentation
Stability of a control system containing a transportation lag can be best analysed by

Routh test
None of these
Root locus methods
Frequency response methods

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