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Process Control and Instrumentation

Process Control and Instrumentation
Gain margin is equal to the

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

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Process Control and Instrumentation
Temperature measuring instruments are standardised mostly with __________ points of pure substances.

Boiling
Both A & B Here
Neither A nor B Here
Melting

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Process Control and Instrumentation
__________ are analysed using a polarograph.

Gases
Liquids
Solids
Isotonic solutions

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Process Control and Instrumentation
Mass spectrometer is used for the composition analysis of

Solids
Alloys
None of these
Isotopes

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Process Control and Instrumentation
Flow rate of a river is measured by a/an

Vane meter
Open weir
Pitot tube
Kennison nozzle

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Process Control and Instrumentation
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is

G/H
H/G
G/(1 + H)
H(1 + G)

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