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Process Control and Instrumentation

Process Control and Instrumentation
Mass spectrometer is used for the composition analysis of

None of these
Isotopes
Solids
Alloys

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Process Control and Instrumentation
The function of a transducer is to

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

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Process Control and Instrumentation
Continuous measurement of specific gravity of a liquid is done by

Both A and C
Contact-type electric indicators
Displacement meter
Hydrometer

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Process Control and Instrumentation
The response of two tanks of same size and resistance in series is

None of these
Over damped
Critically damped
Under damped

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Process Control and Instrumentation
For an input forcing function, X(t) = 2t², the Laplace transform of this function is

2/s³
4/s³
2/s²
4/s²

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Process Control and Instrumentation
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

Nyquist
Bode stability
Routh stability
None of these

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