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Process Control and Instrumentation

Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a functioning element.

Bulb
Bourdon tube
Pointer
None of these

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Process Control and Instrumentation
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?

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

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Process Control and Instrumentation
Working principle of disappearing filament type optical pyrometer is based on the

Wien's law
Peltier effect
Kirchoff's law
Seebeck effect

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Process Control and Instrumentation
Non-metallic diaphragm used as pressure sensor in instruments is generally made of

Thick paper
Synthetic rubber
Teflon
Bakelite

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Process Control and Instrumentation
__________ is undesirable in thermocouples used in industries,

Non-linear relation of emf to temperature
Corrosion resistance
Oxidation resistance
Linear relation of emf to temperature

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Process Control and Instrumentation
Which thermocouple can be used to measure a temperature of around 1400°C ?

Aluminium-chromel
None of these
Copper-constantan
Platinum-platinum+rhodium

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