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Process Control and Instrumentation

Process Control and Instrumentation
An amplitude ratio of 0.1 corresponds to __________ decibels.

20
-20
-10
10

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Process Control and Instrumentation
Polarisation of light forms the working principle of a

Polarimeter
Spectrometer
Polarograph
Chromatograph

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Process Control and Instrumentation
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Invar
Brass
Chromel
Nickel

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Process Control and Instrumentation
Radiation thermometer can not measure the temperature

Of an object without coming in contact with it
Of moving objects at high temperature
Inside a pressure vessel
Of liquid oxygen

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Process Control and Instrumentation
Feed forward controller accounts for the __________ changes.

Load
Both A & B
Neither A nor B
Set point

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Process Control and Instrumentation
Liquid levels in autocalves are measued by

None of these
Differential float type manometer
Simple float
Glass gauge

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