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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following controllers has the least maximum deviation?

P-D controller
P-I-D controller
P-I controller
P-controller

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Process Control and Instrumentation
Emission spectroscopy is used for

NOxdetermination
Determining water purity
Solids and metal analysis
Determination of CO₂ in gases

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Process Control and Instrumentation
Compositional analysis of flue gas coming out of a furnace in respect of O₂ and CO₂% can be continuously done by a/an

Thermal conductivity cell
Orsat apparatus
Chromatograph
Zirconia probe

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Process Control and Instrumentation
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the

Alcohol filled thermometer
Iron-constantan thermocouple
Optical pyrometer
Mercury in glass thermometer

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Volumetric expansion
Differential linear expansion
Increase of thermal conductivity
Increase of pressure

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Process Control and Instrumentation
Which of the following judges the accuracy of an instrument?

None of these
Dead zone
Drift
Static error

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