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Process Control and Instrumentation

Process Control and Instrumentation
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Centigrade
Reaumer
Kelvin
Fahrenheit

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Process Control and Instrumentation
Bourdon tube is never made of

Monel metal
Cast iron
Stainless steel
Phosphor bronze

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Process Control and Instrumentation
Which of the following is a 'contact' pyrometer?

Resistance pyrometer
Infra red pyrometer
Radiation pyrometer
Optical pyrometer

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Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and < 30°
< 1.7 and > 30°
> 1.7 and > 30°
> 1.7 and < 30°

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Process Control and Instrumentation
Non-metallic diaphragm used as pressure sensor in instruments is generally made of

Bakelite
Synthetic rubber
Teflon
Thick paper

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Process Control and Instrumentation
Composition of alloys can be determined by

Polarograph
None of these
Refractrometer
Chromatograph

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