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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
Increases
Decreases

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Process Control and Instrumentation
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its

Static characteristics
Speed of response
Reproducibility
Fidielity

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Process Control and Instrumentation
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

Bimetallic thermometer
Radiation pyrometer
Mercury thermometer
None of these

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Process Control and Instrumentation
An amplitude ratio of 0.1 corresponds to __________ decibels.

10
20
-10
-20

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Process Control and Instrumentation
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is

H(1 + G)
G/(1 + H)
G/H
H/G

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Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Level
Outlet flow rate
Neither A nor B Here
Both A & B Here

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