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Process Control and Instrumentation

Process Control and Instrumentation
The fluid used in hydraulic controller is

Oil
Air
Water
Steam

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is

Chromel-alumel
Iron-constantan
None of these
Platinum-platinum+rhodium

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Process Control and Instrumentation
Hot wire anemometer is used for the measurement of

Very high temperature
Thermal conductivity of gases
Flow rates of granular solids
Flow rates of fluids

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Process Control and Instrumentation
Gain margin is equal to the

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

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Process Control and Instrumentation
Non-metallic diaphragm used as pressure sensor in instruments is generally made of

Thick paper
Synthetic rubber
Bakelite
Teflon

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Process Control and Instrumentation
Turbine flow meters are suitable for

Very limited flow ranges
Both B and C
Cryogenic flow measurements
Aerospace and in air borne applications

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