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Process Control and Instrumentation

Process Control and Instrumentation
The level of a liquid under pressure can be determined using

Bubbler system
Differential pressure manometer
Air-trap system
Diaphragm box system

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Process Control and Instrumentation
Phase lag of the frequency response of a second order system to a sinusoidal forcing function

Is 30°
Is 120°
Approaches 180° asymptotically
Is 90° at the most

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Process Control and Instrumentation
Psychrometer determines the

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

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Process Control and Instrumentation
Phase margin is equal to

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

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Thermocouple
Vapor pressure thermometer
Mercury in glass thermometer
Reistance thermometer

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Process Control and Instrumentation
Mercury thermometer can be used to measure the temperature upto __________ °C.

100
750
250
350

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MORE MCQ ON Process Control and Instrumentation

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