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Process Control and Instrumentation

Process Control and Instrumentation
Process degree of freedom indicates __________ number of controllers to be used.

The minimum
Both maximum and the minimum
The maximum
Nothing about the

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Process Control and Instrumentation
Which of the following is not a variable area flow meter?

Rotameter
Piston type meter
Orifice and tapered plug meter
Magnetic flow meter

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Process Control and Instrumentation
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

Thermo electric pyrometer
Filled system thermometer
Radiation/infrared pyrometer
Mercury in glass thermometer

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Temperature measuring
Voltage measuring
Temperature compensating
Both B & C

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Process Control and Instrumentation
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

Copper-constantan
Platinum-platinum + rhodium
Chromel-alumel
Iron-constantan

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Process Control and Instrumentation
Which of the following is not classified as a thermo electric pyrometer

Resistance thermometer
Radiation pyrometer
Thermocouple
Optical pyrometer (disappearing filament type)

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