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Process Control and Instrumentation

Process Control and Instrumentation
Measurement of sub-zero Celcius temperature in industry is done most commonly by

Thermocouples
Gas thermometers
Bi-metallic thermometers
Resistance thermometers

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Process Control and Instrumentation
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'

Celcius
Reumur
Farenhite
Rankine

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

None of these
Dead zone
Drift
Static error

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Process Control and Instrumentation
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

Dielectrics
Insulators
Conductors
Semi conductors

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

Τds + 1
1/(τds + 1)
E-τds
Eτds

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

NO₂
CO₂
O₂
NO

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