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Process Control and Instrumentation

Process Control and Instrumentation
Thermocouple is suitable for measuring

Very low temperatures only
Very high temperatures only
Liquid temperatures only
Both high and low temperatures

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Process Control and Instrumentation
Stability of a control system containing a transportation lag can be best analysed by

None of these
Frequency response methods
Routh test
Root locus methods

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Process Control and Instrumentation
Mercury manometer (U-tube type) exemplifies a __________ order system.

Second
First
Zero
Third

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Process Control and Instrumentation
Which of the following can not measure a temperature of 1600°C ?

Thermocouple
Radiation pyrometer
Platinum resistance thermometer
Photo-electric pyrometer

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Process Control and Instrumentation
Which of the following flow-metering instru-ments is an areameter?

Pitot tube
Venturimeter
Rotameter
Hot wire anemometer

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Process Control and Instrumentation
Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C?

Thermocouples
Optical pyrometer
Radiation pyrometer
Photoelectric pyrometer

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