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Process Control and Instrumentation

Process Control and Instrumentation
Pyrometry refers to the measurement of temperature

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

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is

Platinum-platinum+rhodium
Chromel-alumel
Iron-constantan
None of these

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Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

Peltier
Seebeck
None of these
Thomson

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Process Control and Instrumentation
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

Thomson effect
Joule heating effect
Peltier effect
Seebeck effect

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Process Control and Instrumentation
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

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

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Process Control and Instrumentation
Bode stability method uses __________ loop transfer function.

Neither A nor B Here
Open
Closed
Either A Or B Here

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