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Process Control and Instrumentation

Process Control and Instrumentation
__________ controller has the maximum stabilising time.

PI
PD
P
PID

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Process Control and Instrumentation
Gas chromatography is used for the measurement of

Temperature
Flow rate
Pressure
Concentration

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Process Control and Instrumentation
Phase lag of the sinusoidal response of a first order system is

30°
180°
120°
90°

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Process Control and Instrumentation
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

700
350
550
250

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Process Control and Instrumentation
Which of the following is not a differential pressure flow meter?

Orificemeter
Flow nozzle
Venturimeter
Rotameter

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Process Control and Instrumentation
Pyrometry refers to the measurement of temperature

With the mercurial thermometer upto 350°C
Directly
Which is of higher magnitude
All of these

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