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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C?

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

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Millivolts
Kilo volts
Microvolts
Volts

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Process Control and Instrumentation
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

Ionisation
Mcloid
Pirani
None of these

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

Spring loaded diaphragm valve
Thermocouple kept immersed in a liquid filled thermowell
U-tube manometer
CSTR with first order reaction

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Process Control and Instrumentation
Which of the following is a 'contact' pyrometer?

Infra red pyrometer
Radiation pyrometer
Resistance pyrometer
Optical pyrometer

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

NO
NO₂
CO₂
O₂

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