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Process Control and Instrumentation

Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

2nd
1st
3rd
Zero

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Process Control and Instrumentation
Compositional analysis of __________ is done using mass spectrometer.

Natural gas
An isotope
An alloy
A solid

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Process Control and Instrumentation
Liquid levels in autocalves are measued by

None of these
Glass gauge
Differential float type manometer
Simple float

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Process Control and Instrumentation
Phase margin is equal to

Phase lag + 180°
Phase lag - 180°
Phase lag + 90°
180° - phase lag

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Process Control and Instrumentation
Positioning controllers are used for

High loads
Temperature changes
Low loads
Flow rate changes

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Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C?

Copper - constantan
Platinum - platinum + rhodium
Chromel - alumel
Iron-constantan

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