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Process Control and Instrumentation

Process Control and Instrumentation
Characteristic equation is the denominator of __________ loop transfer function.

Neither A Nor B Here
Both A & B Here
Open
Closed

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Process Control and Instrumentation
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an

Optical pyrometer
Chromel-alumel thermocouple
Radiation pyrometer
Either B or C

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Process Control and Instrumentation
Use of I-control along with P-control facilitates

Elimination of offset
Reduction of stability time
Reduction of offset
None of these

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Process Control and Instrumentation
Polarisation of light forms the working principle of a

Polarograph
Spectrometer
Chromatograph
Polarimeter

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

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

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Volumetric expansion
Increase of pressure
Differential linear expansion
Increase of thermal conductivity

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