Process Control and Instrumentation
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Brass
Chromel
Nickel
Invar

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Process Control and Instrumentation
Thermodynamic celcius scale of temperature measurement is

Having an interval of 100° between ice point to steam point
Having an interval of 100° between ice point to steam point
Defined on the basis of melting point of ice and evaporation temperature of water vapor
Both A&B Here

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