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Process Control and Instrumentation

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

Critically damped
None of these
Stable
Unstable

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Process Control and Instrumentation
__________ are analysed using a polarograph.

Liquids
Solids
Gases
Isotonic solutions

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Process Control and Instrumentation
In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable.

None of these
Manipulated
Load
Controlled

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Process Control and Instrumentation
In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.

Controlled
Manipulated
Load
None of these

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Process Control and Instrumentation
Humidity of air can be determined by a

Polarimeter
Chromatograph
Mass spectrometer
Sling psychrometer

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Process Control and Instrumentation
Change of angle of refraction with composition comprises the working principle of a

Polarograph
Refractrometer
Spectrometer
Polarimeter

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