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Process Control and Instrumentation

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

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

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Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

3rd
2nd
Zero
1st

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Process Control and Instrumentation
Which of the following is never used as an element of industrial resistance thermometer?

30% iron + 70% nickel
Copper
Lead
Nickel

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Process Control and Instrumentation
Which of the following is a 'contact' pyrometer?

Infra red pyrometer
Resistance pyrometer
Radiation pyrometer
Optical pyrometer

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

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

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Process Control and Instrumentation
Which of the following is an undesirable dynamic characteristic of an instrument?

Dead zone
Reproducibility
Time lag
Static error

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