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Process Control and Instrumentation

Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

Eτds
Τds + 1
E-τds
1/(τds + 1)

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Neither A nor B
Both A & B Here
Absolute as well as differential
Gage as well as vacuum

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Process Control and Instrumentation
Phase margin is equal to

Phase lag + 90°
Phase lag - 180°
180° - phase lag
Phase lag + 180°

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Process Control and Instrumentation
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .

< atmospheric
> 2(gage)
< 3 (gage)
< 10 (gage)

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Process Control and Instrumentation
Gain margin is equal to the

Reciprocal of amplitude ratio
Gain in P-I controller
Amplitude ratio
Gain in P controller

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Process Control and Instrumentation
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'

Reumur
Rankine
Celcius
Farenhite

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