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Process Control and Instrumentation

Process Control and Instrumentation
Concentration of sugar solution can be determined by the

Polarimetry
Emission spectroscopy
Flame photometry
Oscillometry

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

Spring loaded diaphragm valve
Thermocouple kept immersed in a liquid filled thermowell
U-tube manometer
CSTR with first order reaction

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Process Control and Instrumentation
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?

< 1
None of these
>1
1

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Process Control and Instrumentation
Compositional analysis of flue gas coming out of a furnace in respect of O₂ and CO₂% can be continuously done by a/an

Chromatograph
Orsat apparatus
Thermal conductivity cell
Zirconia probe

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Process Control and Instrumentation
On-off controllers are normally used for

Low loads
Temperature changes
None of these
Flow rate changes

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Process Control and Instrumentation
Phase margin is equal to

Phase lag + 90°
Phase lag + 180°
180° - phase lag
Phase lag - 180°

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