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Process Control and Instrumentation

Process Control and Instrumentation
Measurement of sub-zero Celcius temperature in industry is done most commonly by

Thermocouples
Resistance thermometers
Gas thermometers
Bi-metallic thermometers

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

Bimetallic
Mercury in glass
Vapor pressure
Resistance

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Process Control and Instrumentation
A stable system is the one

For which the output response is bounded for all bounded input
Which exhibits an unbounded response to a bounded input
None of these
Which satisfies the conditions for a servo problem

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Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

1st
2nd
3rd
Zero

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Process Control and Instrumentation
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

Semi conductors
Conductors
Insulators
Dielectrics

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Process Control and Instrumentation
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

Thermo electric pyrometer
Mercury in glass thermometer
Filled system thermometer
Radiation/infrared pyrometer

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