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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following is a desirable characteristic of an instrument?

High drift
High measuring lag
Poor reproducibility
High fidelity

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Process Control and Instrumentation
Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing

Hydrogen
None of these
Nitrogen
Helium

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Process Control and Instrumentation
The temperature range for which copper resistance thermometer can be used is __________ °C

500 to 900
0 to 150
-200 to 150
350 to 750

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Process Control and Instrumentation
Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a

Magnetic flowmeter
Pitot tube
Flow nozzle type flowmeter
Turbine flowmeter

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Process Control and Instrumentation
Pirani gauge is used for the measurement of

Liquid level under pressure
Liquid level at atmospheric pressure
High vacuum
Very high pressure

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Process Control and Instrumentation
Thermal conductivity measurement is used for the determination of

Specific gravity of petrofuels
Composition of an alloy
CO₂ percentage in the flue gas
O₂ percentage in the flue gas

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