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Process Control and Instrumentation

Process Control and Instrumentation
In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.

Controlled
Load
Manipulated
None of these

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Process Control and Instrumentation
For measuring the temperature of a red hot furnace, which is the most suitable instrument?

Bimetallic thermometer
Thermocouple
Optical pyrometer
Platinum resistance thermometer

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Process Control and Instrumentation
Which of the following is not a differential pressure flow meter?

Orificemeter
Rotameter
Flow nozzle
Venturimeter

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Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Overdamped
Highly fluctuating
Critically damped
Underdamped

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Process Control and Instrumentation
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?

Radiation pyrometer
Vapor pressure thermometer
Mercury in glass thermometer
Platinum resistance thermometer

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Process Control and Instrumentation
Which of the following thermocouples has the least temperature measurement range?

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

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