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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following thermocouples has the widest temperature measurement range?

Copper-constantan
Platinum-platinum/rhodium
Iron-constantan
Chromel-alumel

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

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

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Process Control and Instrumentation
Bode diagram are generated from output response of the system subjected to which of the following input?

Ramp
Sinusoidal
Impulse
Step

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Process Control and Instrumentation
In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable.

Manipulated
Controlled
None of these
Load

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

E-τds
Τds + 1
Eτds
1/(τds + 1)

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Process Control and Instrumentation
The transfer function of a first order system is

None of these
1/Ts
S/(Ts + 1)
1/(Ts + 1)

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