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Process Control and Instrumentation

Process Control and Instrumentation
In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.

Ordinary
Semi-log
Triangular
Log-log

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Volumetric expansion
None of these
Linear expansion
Pressure rise with temperature

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Process Control and Instrumentation
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.

Hydrogen
Nitrogen
None of these
Helium

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Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Chromel-alumel
Iron-constantan
Platinum-platinum+rhodium
Either A, B or C

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

Static error
Dead zone
Reproducibility
Time lag

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Process Control and Instrumentation
Configuration of Bourdon spring tube is never made of __________ shape.

Semi-circular
Helical
Spiral
Circular

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