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Process Control and Instrumentation

Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Linear expansion
Pressure rise with temperature
None of these
Volumetric expansion

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Nichrome
Vycor (a glass)
Steel
Inconel

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a secondary element.

None ofthese
Bulb
Pointer
Bourdon tube

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Process Control and Instrumentation
Bode diagram is a plot of

AR vs. log (f) and Φ vs. log (f)
Log (AR) vs. log (f) and (Φ) vs. log (f)
Log (AR) vs. f and log Φ vs.f
None of these

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

1/(τds + 1)
Τds + 1
E-τds
Eτds

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Process Control and Instrumentation
Radiation thermometer can not measure the temperature

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

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