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Process Control and Instrumentation

Process Control and Instrumentation
Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.

0.1
0.01
0.0001
0.001

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Process Control and Instrumentation
Which of the following judges the accuracy of an instrument?

None of these
Dead zone
Drift
Static error

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Process Control and Instrumentation
Stroboscope is used for the measurement of

Rpm of a flywheel
Depression of freezing point
Frequency of light
Liquid level under pressure

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Process Control and Instrumentation
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

N₂
O₂
CO
CO₂

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is

Platinum-platinum+rhyodium
Chromel-alumel
Iron-constantan
Platinum-rhodium

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Process Control and Instrumentation
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

Ordinary
Triangular
Log-lag
Semi-log

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