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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Both A & B Here
Neither A nor B Here
Level
Outlet flow rate

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Process Control and Instrumentation
A mercury barometer measures the __________ pressure.

Gauge
Atmospheric
Absolute
Vacuum

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Process Control and Instrumentation
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.

Helium
Hydrogen
None of these
Nitrogen

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Process Control and Instrumentation
What is the Laplace transform of sin t ?

1/(s² + 1)
S/(s² - 1)
S/(s² + 1)
1/(s² - 1)

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Process Control and Instrumentation
Gain margin is equal to the

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

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Process Control and Instrumentation
Measurement of sub-zero Celcius temperature in industry is done most commonly by

Resistance thermometers
Thermocouples
Gas thermometers
Bi-metallic thermometers

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