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Process Control and Instrumentation

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

Polarimetry
Flame photometry
Oscillometry
Emission spectroscopy

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Process Control and Instrumentation
For measuring the temperature of a red hot furnace, which is the most suitable instrument?

Bimetallic thermometer
Optical pyrometer
Thermocouple
Platinum resistance thermometer

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Process Control and Instrumentation
Cascade control means

One feed-back loop
Feed forward control
On-off control
More than one feed-back loop

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Iron-constantan
Chromel-constantan
Platinum-platinum + rhodium
All of these

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Process Control and Instrumentation
What is the Laplace transform of impulse input having magnitude 'X' ?

X
1/X
1
X²

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Process Control and Instrumentation
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of

0.5
2.0
4.0
1.0

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