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Process Control and Instrumentation

Process Control and Instrumentation
Which is the most suitable instrument for measuring pressure below 3 microns?

Alphatron
Bourdon guage
Ionisation gauge
Mcleoid gauge

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Process Control and Instrumentation
Which of the following is not a composition measuring instrument?

Mass spectrometer
Hot wire anemometer
Polarograph
Thermal conductivity cell

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Process Control and Instrumentation
Mercury manometer (U-tube type) exemplifies a __________ order system.

First
Third
Zero
Second

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Process Control and Instrumentation
Bode diagram is a plot of

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

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Process Control and Instrumentation
__________ thermometer can not measure sub-zero (< 0° C) temperature,

Bimetallic
Vapor pressure
Mercury in glass
Resistance

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Process Control and Instrumentation
Use of I-control along with P-control facilitates

Reduction of stability time
None of these
Elimination of offset
Reduction of offset

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