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Process Control and Instrumentation

Process Control and Instrumentation
A simple pitot tube measures the

Point velocity
Static pressure
Maximum velocity
Average velocity

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Process Control and Instrumentation
Thermal wells are used in the temperature measurement to

Increase the fidelity
Reduce measuring lag
Guard against corrosive and oxidising action on thermocouple materials
Increase the sensitivity

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Process Control and Instrumentation
Thermocouple in a thermal well behaves as a true

Second order system (underdamped)
First order system
Second order system (overdamped)
Multiple first order system

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Process Control and Instrumentation
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer

Increases exponentially
Remains constant
Decreases
Increases

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Process Control and Instrumentation
Which is the most suitable instrument for measuring pressure below 3 microns?

Mcleoid gauge
Alphatron
Ionisation gauge
Bourdon guage

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Process Control and Instrumentation
Which of the following fluid flow measuring devices can measure the largest flow rate?

Rotameter
V-notch
Weir
Orificemeter

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