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Process Control and Instrumentation

Process Control and Instrumentation
__________ is an example of distributed parameter system

CSTR
Tubular reactor
None of these
On-off controller

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Process Control and Instrumentation
Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.

Nickel
Gold
Antimony
Silver

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Process Control and Instrumentation
Radiation pyrometers as compared to thermocouples

Has a slower speed of response
Can't measure the temperature of moving objects
Is more affected by corrosive atmosphere
Can measure higher temperature

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Iron-constantan
Chromel-constantan
All of these
Platinum-platinum + rhodium

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

Routh test
None of these
Root locus methods
Frequency response methods

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Process Control and Instrumentation
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is

Carbon tetrachloride
Paraffin
Ethylene glycol
Water

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