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Process Control and Instrumentation

Process Control and Instrumentation
Polarograph is meant for the analysis of

Solids
Miscible liquids
Gaseous mixture
Isotopes

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Process Control and Instrumentation
Pyrometry refers to the measurement of temperature

All of these
Which is of higher magnitude
With the mercurial thermometer upto 350°C
Directly

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Process Control and Instrumentation
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?

Alcohol in glass thermometer
Mercury in steel thermometer
Fused metal (Na or K) in steel thermometer
Mercury in glass thermometer

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Process Control and Instrumentation
Phase lag of the frequency response of a second order system to a sinusoidal forcing function

Is 90° at the most
Is 120°
Is 30°
Approaches 180° asymptotically

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Process Control and Instrumentation
Pirani gauge is used for the measurement of

High vacuum
Liquid level under pressure
Liquid level at atmospheric pressure
Very high pressure

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Process Control and Instrumentation
Which of the following judges the accuracy of an instrument?

Static error
Dead zone
None of these
Drift

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