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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following controllers has maximum offset?

P-I-D controller
P-controller
P-I controller
P-D controller

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Process Control and Instrumentation
The thermal emf-temperature relationship of most thermocouples is

Exponential
Linear
Square root
Parabolic

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Process Control and Instrumentation
According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is

45°
90°
0°
180°

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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

Dilatometer
Mercury thermometer
Bimetallic thermometer
Beckman thermometer

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Process Control and Instrumentation
Process degree of freedom indicates __________ number of controllers to be used.

Both maximum and the minimum
Nothing about the
The minimum
The maximum

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Process Control and Instrumentation
The operation of a rotameter is based on

Variable flow area
Pressure at a stagnation point
Pressure drop across a nozzle
Rotation of a turbine

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MORE MCQ ON Process Control and Instrumentation

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