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Process Control and Instrumentation

Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and > 30°
> 1.7 and < 30°
< 1.7 and < 30°
> 1.7 and > 30°

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Process Control and Instrumentation
Load cells are used for the measurement of

Weight
Stress
Velocity
Strain

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Process Control and Instrumentation
Mass spectrometer is used for the composition analysis of

None of these
Isotopes
Alloys
Solids

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

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

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Process Control and Instrumentation
Working principle of radiation pyrometer is based on the

Kirchoffs law
Wien's law
Stafan-Boltzman law
Seebeck effect

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Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Either A, B or C
Chromel-alumel
Platinum-platinum+rhodium
Iron-constantan

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