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Process Control and Instrumentation

Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

Seebeck
Thomson
Peltier
None of these

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Process Control and Instrumentation
Continuous measurement of moisture content of paper in paper industry is done by measuring the

Electrical resistance through the paper
Magnetic susceptibility
Thermal conductivity through the paper
None of these

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

Eτds
E-τds
Τds + 1
1/(τds + 1)

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

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

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Process Control and Instrumentation
Continuous measurement of moisture in paper is done by

Sling psychrometer
Hair-hygrometer
Weighing
High resistance Wheatstone's bridge circuit

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Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and < 30°
< 1.7 and > 30°
> 1.7 and < 30°
> 1.7 and > 30°

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