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Process Control and Instrumentation

Process Control and Instrumentation
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

Radiation
Photoelectric
None of these
Optical

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

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

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Process Control and Instrumentation
Which of the following is not the triple point of water?

32°F
32°R
492°R
273°K

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Process Control and Instrumentation
In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the __________ variable.

None of these
Controlled
Load
Manipulated

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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
The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is

5π/12
π/3
π/12
π/6

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