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Process Control and Instrumentation

Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Liquid volume in the tank
Level of liquid
Flow rate
Heat content of the system

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

None of these
Critically damped
Stable
Unstable

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Process Control and Instrumentation
Working principle of disappearing filament type optical pyrometer is based on the

Seebeck effect
Kirchoff's law
Wien's law
Peltier effect

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

Oscillometry
Flame photometry
Polarimetry
Emission spectroscopy

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Process Control and Instrumentation
For measuring the temperature of a red hot furnace, which is the most suitable instrument?

Optical pyrometer
Bimetallic thermometer
Thermocouple
Platinum resistance thermometer

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Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and < 30°
> 1.7 and < 30°
> 1.7 and > 30°
< 1.7 and > 30°

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