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Process Control and Instrumentation

Process Control and Instrumentation
On-off controllers are normally used for

Temperature changes
Low loads
Flow rate changes
None of these

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Process Control and Instrumentation
The closed loop pole of a stable second order system could be

One real positive and the other real negative
Complex conjugate with positive real parts
Both real and positive
Both real and negative

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Process Control and Instrumentation
Thermal wells used in temperature measurements should have

Low emissivity
Very thick walls
High transmissivity of radiation
Polished surface

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Process Control and Instrumentation
A mercury barometer measures the __________ pressure.

Absolute
Vacuum
Gauge
Atmospheric

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Process Control and Instrumentation
Bode stability method uses __________ loop transfer function.

Neither A nor B Here
Either A Or B Here
Open
Closed

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Process Control and Instrumentation
Paramagnetism method is not used for the composition determination of __________ in gases.

Oxygen
Any of these
Carbon dioxide
Oxides of nitrogen

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