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Process Control and Instrumentation

Process Control and Instrumentation
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

Mcloid
None of these
Ionisation
Pirani

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Process Control and Instrumentation
Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a

Bimetallic thermometer
Dilatometer
Mercury thermometer
Beckman thermometer

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Process Control and Instrumentation
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

4
3
1
2

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Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Level of liquid
Heat content of the system
Liquid volume in the tank
Flow rate

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Process Control and Instrumentation
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

45°
-180°
-90°
-45°

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

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

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