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Process Control and Instrumentation

Process Control and Instrumentation
A manometer measures the __________ pressure.

None of these
Gauge
Atmospheric
Absolute

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Process Control and Instrumentation
The level of a liquid under pressure can be determined using

Diaphragm box system
Differential pressure manometer
Bubbler system
Air-trap system

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Process Control and Instrumentation
Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing

None of these
Nitrogen
Hydrogen
Helium

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Process Control and Instrumentation
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

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

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Process Control and Instrumentation
Use of I-control along with P-control facilitates

Reduction of offset
Elimination of offset
Reduction of stability time
None of these

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Process Control and Instrumentation
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

Ratio
Sum
Product
Difference

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