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Process Control and Instrumentation

Process Control and Instrumentation
Bourdon gauges are used for measuring pressure (kg/cm² )

> 10 (absolute)
< 2 (gauge)
< atmospheric
> 2 (gauge)

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Process Control and Instrumentation
Phase lag of the sinusoidal response of a first order system is

30°
120°
90°
180°

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Process Control and Instrumentation
__________ type of element is normally not used in the bimetallic thermometers.

Bourdon tube
Flat spiral
Multiple helix
Single helix

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Water
Oil
Steam
Air

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 0.1
> 3
< 3
< 1

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Process Control and Instrumentation
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-60.9
-38.9
-80.9
-11.9

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