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Process Control and Instrumentation

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

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

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Process Control and Instrumentation
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

50
1
10
100

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a primary element.

Bourdon tube
Bulb
Pointer
None of these

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Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Reducing value of Kc
Introducing derivative control
Introducing integral control
None of these

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Process Control and Instrumentation
Bode diagram is a plot of

Log (AR) vs. log (f) and (Φ) vs. log (f)
None of these
Log (AR) vs. f and log Φ vs.f
AR vs. log (f) and Φ vs. log (f)

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

Load
Controlled
Manipulated
None of these

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