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Process Control and Instrumentation

Process Control and Instrumentation
Mass spectrometer is used for the composition analysis of

Solids
None of these
Isotopes
Alloys

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Process Control and Instrumentation
An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall. This is the working principle of a

Chromatograph
PH meter
Polarograph
Polarimeter

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Process Control and Instrumentation
The thermal emf-temperature relationship of most thermocouples is

Linear
Exponential
Parabolic
Square root

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Process Control and Instrumentation
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

Thermocouple
Radiation pyrometer
Mercury thermometer
Bimetallic thermometer

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Process Control and Instrumentation
Thermal conductivity measurement is used for the determination of

Composition of an alloy
Specific gravity of petrofuels
CO₂ percentage in the flue gas
O₂ percentage in the flue gas

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Process Control and Instrumentation
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

550
350
250
700

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