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Process Control and Instrumentation

Process Control and Instrumentation
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is

1 - e-t
1 - et
1 + et
1 + e-t

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Process Control and Instrumentation
Which of the following is not classified as a thermo electric pyrometer

Optical pyrometer (disappearing filament type)
Resistance thermometer
Thermocouple
Radiation pyrometer

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

Photo-electric pyrometer
Radiation pyrometer
Thermocouple
Platinum resistance thermometer

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Process Control and Instrumentation
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.

Oxygen in
Carbon monoxide in
Temperature of
Carbon dioxide in

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Process Control and Instrumentation
The function of a transducer is to

Modify the input signal
Codify/decodify the input signal
Amplify the input signal
Convert the primary signal into a more useful quantity, usually an electric impulse

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Process Control and Instrumentation
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same

Speed of response
Temperature measuring range (- 40°C to 450°C)
Accuracy (± 1% of span)
All of these

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