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Process Control and Instrumentation

Process Control and Instrumentation
Bimetal strips are not used in

Thermocouples
Bimetallic thermometers
Thermostats
Relays for opening & closing of electrical circuits

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change?

Water
Mercury
Carbon-tetrachloride
Methyl alcohal

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Process Control and Instrumentation
Flame photometry is used for the determination of compositional analysis of

Natural gas
Solids
Alkali metals
Isotopes

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Process Control and Instrumentation
In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.

Ordinary
Triangular
Log-log
Semi-log

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Process Control and Instrumentation
Psychrometer determines the

Moisture content of solids
Water of crystallisation
Humidity of gases
Hygroscopic nature of solids

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 1
< 0.1
< 3
> 3

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