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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following thermocouples has the widest temperature measurement range?

Platinum-platinum/rhodium
Iron-constantan
Copper-constantan
Chromel-alumel

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Process Control and Instrumentation
All the thermocouples used for temperature measurement use dissimilar metal

Bars
Beads
Wires
Strips

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Process Control and Instrumentation
Compositional analysis of flue gas coming out of a furnace in respect of O₂ and CO₂% can be continuously done by a/an

Chromatograph
Orsat apparatus
Thermal conductivity cell
Zirconia probe

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Process Control and Instrumentation
Thermal wells are used in the temperature measurement to

Guard against corrosive and oxidising action on thermocouple materials
Increase the fidelity
Reduce measuring lag
Increase the sensitivity

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Process Control and Instrumentation
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer

Increases exponentially
Decreases
Increases
Remains constant

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Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

50
30
20
40

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