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Process Control and Instrumentation

Process Control and Instrumentation
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer

Remains constant
Increases exponentially
Decreases
Increases

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Process Control and Instrumentation
Which of the following is not a composition measuring instrument?

Mass spectrometer
Hot wire anemometer
Polarograph
Thermal conductivity cell

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Process Control and Instrumentation
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?

1
>1
None of these
< 1

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Process Control and Instrumentation
Which of the following is not classified as a thermo electric pyrometer

Thermocouple
Radiation pyrometer
Resistance thermometer
Optical pyrometer (disappearing filament type)

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Process Control and Instrumentation
Hot wire anemometer is used for the measurement of

Thermal conductivity of gases
Flow rates of fluids
Very high temperature
Flow rates of granular solids

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Process Control and Instrumentation
When a bare thermocouple is covered by a protective sheath, the response becomes

Slower and non-oscillatory
Faster and non-oscillatory
Slower and oscillatory
Faster and oscillatory

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