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Process Control and Instrumentation

Process Control and Instrumentation
In Bode plot, Φ vs ω is plotted on a/an __________ graph paper.

Triangular
Ordinary
Semi-log
Log-log

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Process Control and Instrumentation
Gain margin is equal to the

Amplitude ratio
Gain in P controller
Gain in P-I controller
Reciprocal of amplitude ratio

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Process Control and Instrumentation
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

Bimetallic thermometer
Mercury thermometer
Radiation pyrometer
None of these

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Process Control and Instrumentation
Number of poles in a system with transfer function 1/(s² + 2s² + 1) is

5
3
2
1

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Process Control and Instrumentation
The function of a transducer is to

Codify/decodify the input signal
Amplify the input signal
Convert the primary signal into a more useful quantity, usually an electric impulse
Modify the input signal

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Air
Steam
Oil
Water

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