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Process Control and Instrumentation

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.

1
50
10
100

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Process Control and Instrumentation
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

Ratio
Product
Sum
Difference

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Process Control and Instrumentation
Which of the following is an undesirable dynamic characteristic of an instrument?

Dead zone
Static error
Reproducibility
Time lag

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Process Control and Instrumentation
Stability of a control system containing a transportation lag can be best analysed by

Frequency response methods
None of these
Routh test
Root locus methods

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Process Control and Instrumentation
Polarograph is meant for the analysis of

Gaseous mixture
Miscible liquids
Isotopes
Solids

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Process Control and Instrumentation
Flapper nozzle is used in a/an __________ controller.

Electronic
Pneumatic
Hydraulic
None of these

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