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Process Control and Instrumentation

Process Control and Instrumentation
Concentration of sugar solution can be determined by the

Emission spectroscopy
Flame photometry
Polarimetry
Oscillometry

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Process Control and Instrumentation
Routh stability method uses __________ loop transfer function.

Closed
Open
Either A or B
Neither A nor B

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Process Control and Instrumentation
Volumetric expansion is the working principle of the __________ thermometers.

Bimetallic
Vapor pressure
Constant volume gas
Mercury in glass

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Process Control and Instrumentation
The frequency response of a first order system, has a phase shift with lower and upper bounds given by

0, π/2
-π/2, π/2
- ∞, π/2
-π/2, 0

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Process Control and Instrumentation
In second order underdamped system,

Decay ratio = overshoot
Overshoot increases for increasing damping co-efficient
Large damping co-efficient means smaller damping
Decay ratio = (overshoot)²

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Process Control and Instrumentation
Which of the following judges the accuracy of an instrument?

None of these
Static error
Drift
Dead zone

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