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Process Control and Instrumentation

Process Control and Instrumentation
The pressure sensing element of elastic type pressure gauge is never made in the form of a

Bellow
Strip
Bourdon tube
Diaphragm

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Process Control and Instrumentation
Thermal conductivity measurement com-prises the working principle of a

Chromatograph
CO₂ analyser
Spectrometer
Polarimeter

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Process Control and Instrumentation
Positioning controllers are used for

Temperature changes
High loads
Flow rate changes
Low loads

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Process Control and Instrumentation
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

Radiation
None of these
Photoelectric
Optical

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Process Control and Instrumentation
Conversion formula for converting amplitude ratio (AR) into decibels is

Decibel = 20 loge (AR)
Decibel = 20 log10 (AR)
Decibel = 20 log10 (AR)0.5
Decibel = 20 loge (AR)0.5

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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
Radiation pyrometer
Either B or C
Chromel-alumel thermocouple

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