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Process Control and Instrumentation

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

Zero
2nd
3rd
1st

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Process Control and Instrumentation
The unit of 'time constant' of a system is the same as that of

(time)⁻¹
Time
None of these
Velocity

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

CO₂
NO₂
NO
O₂

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

4/s²
4/s³
2/s³
2/s²

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Process Control and Instrumentation
Turbine flow meters are suitable for

Very limited flow ranges
Aerospace and in air borne applications
Both B and C
Cryogenic flow measurements

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Process Control and Instrumentation
Which of the following is the dynamic characteristics of an instrument?

Reproducibility
Dead zone
Sensitivity
Fidelity

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