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Process Control and Instrumentation

Process Control and Instrumentation
Turbine flow meters are suitable for

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

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Process Control and Instrumentation
According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is

180°
90°
0°
45°

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

Polarimetry
Oscillometry
Flame photometry
Emission spectroscopy

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Process Control and Instrumentation
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

Platinum-platinum + rhodium
Copper-constantan
Iron-constantan
Chromel-alumel

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Process Control and Instrumentation
Transfer function of transportation lag is

None of these
ETS
1/(TS + 1)
E-TS

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

3
2
1
5

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