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Process Control and Instrumentation

Process Control and Instrumentation
The transfer function of a process is 1/(16s² + 8s + 4). If a step change is introduced into the system, then the response will be

Critically damped
None of these
Over damped
Under damped

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Process Control and Instrumentation
Which of the following does not figure in the list of seven substances selected for international temperature scale?

Ice (F.P) and steam (B.P)
Antimony and silver (F.P)
Oxygen and sulphur (B.P)
Zinc (B.P) and mercury (F.P)

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Process Control and Instrumentation
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

Photoelectric
Radiation
Optical
None of these

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Process Control and Instrumentation
Smoke density of the flue gas going out of the chimney is measured by a

Thermal conductivity meter
Photo electric cell
Polarograph
Chromatograph

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Both A & B Here
Neither A nor B
Gage as well as vacuum
Absolute as well as differential

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Platinum-platinum + rhodium
Chromel-constantan
All of these
Iron-constantan

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