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Process Control and Instrumentation

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

Mercury in glass
Resistance
Bimetallic
Vapor pressure

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Process Control and Instrumentation
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same

Speed of response
Accuracy (± 1% of span)
Temperature measuring range (- 40°C to 450°C)
All of these

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Process Control and Instrumentation
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

-45°
45°
-90°
-180°

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Process Control and Instrumentation
Pirani gauge is used for the measurement of

High vacuum
Very high pressure
Liquid level at atmospheric pressure
Liquid level under pressure

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Process Control and Instrumentation
Optical activity of a solution can be determined using a

Dilatometer
Refractrometer
Polarograph
Polarimeter

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Process Control and Instrumentation
Dead zone is the

None of these
Same as transportation lag
Maximum change in the variable that does not change the reading of the instrument
Same as time constant

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