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Process Control and Instrumentation

Process Control and Instrumentation
A mercury barometer measures the __________ pressure.

Absolute
Gauge
Vacuum
Atmospheric

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

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

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Process Control and Instrumentation
Which of the following thermocouples can measure the maximum temperature?

Iron-constantan
Tungsten-molybdenum
Platinum-rhodium
Chromel-alumel

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Process Control and Instrumentation
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an

Liquid semi-conductor
Solid semi-conductor
Insulator
Conductor

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Process Control and Instrumentation
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

CO₂
CO
O₂
N₂

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Process Control and Instrumentation
Paramagnetism method is not used for the composition determination of __________ in gases.

Oxygen
Any of these
Oxides of nitrogen
Carbon dioxide

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