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Process Control and Instrumentation

Process Control and Instrumentation
Transfer function of transportation lag is

E-TS
ETS
None of these
1/(TS + 1)

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Process Control and Instrumentation
A barometer measures the __________ pressure.

Absolute
Gauge
Dynamic
Absolute as well as gauge

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Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Heat content of the system
Flow rate
Liquid volume in the tank
Level of liquid

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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
Radiation pyrometers as compared to thermocouples

Is more affected by corrosive atmosphere
Can measure higher temperature
Can't measure the temperature of moving objects
Has a slower speed of response

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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

Reproducibility
Fidielity
Speed of response
Static characteristics

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