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Process Control and Instrumentation

Process Control and Instrumentation
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Kelvin
Centigrade
Reaumer
Fahrenheit

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Process Control and Instrumentation
Working principle of disappearing filament type optical pyrometer is based on the

Kirchoff's law
Wien's law
Seebeck effect
Peltier effect

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 1
> 3
< 3
< 0.1

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Process Control and Instrumentation
Temperature measuring instruments are standardised mostly with __________ points of pure substances.

Both A & B Here
Boiling
Melting
Neither A nor B Here

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Process Control and Instrumentation
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

Bimetallic thermometer
Thermocouple
Mercury thermometer
Radiation pyrometer

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Nichrome
Inconel
Steel
Vycor (a glass)

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