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Process Control and Instrumentation

Process Control and Instrumentation
Psychrometer determines the

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

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Process Control and Instrumentation
On-off controllers are normally used for

None of these
Flow rate changes
Low loads
Temperature changes

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Process Control and Instrumentation
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature

Both B and C Here
Embrittlement of iron occurs
Rusting of iron takes place
Emf produced is very low of the order of microvolt

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Process Control and Instrumentation
Turbine flow meters are suitable for

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

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Process Control and Instrumentation
Which of the following is not a speed measuring instrument?

All of these
Stroboscope
Psychrometer
Tachometer

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Process Control and Instrumentation
Pressure of 0.0001 absolute psi can be measured by __________ gauge

Pirani
None of these
Mcloid
Thermocouple

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