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Process Control and Instrumentation

Process Control and Instrumentation
Gain margin is equal to the

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

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Process Control and Instrumentation
Composition of natural gas is determined by the

Both B and C
Haldane apparatus
Mass spectrometer
Chromatograph

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Process Control and Instrumentation
Psychrometer determines the

Humidity of gases
Moisture content of solids
Water of crystallisation
Hygroscopic nature of solids

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Process Control and Instrumentation
Use of I-control along with P-control facilitates

Reduction of stability time
None of these
Reduction of offset
Elimination of offset

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Process Control and Instrumentation
The operation of a rotameter is based on

Variable flow area
Pressure drop across a nozzle
Pressure at a stagnation point
Rotation of a turbine

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Process Control and Instrumentation
A pyrheliometer is an instrument used for measuring the

Beam radiation
None of these
Bright sunshine period
Diffuse radiation

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