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Process Control and Instrumentation

Process Control and Instrumentation
A pyranometer is an instrument used for measuring the

Beam radiation
Bright sunshine period
None of these
Global radiation

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Process Control and Instrumentation
Working principle of radiation pyrometer is based on the

Stafan-Boltzman law
Kirchoffs law
Seebeck effect
Wien's law

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Process Control and Instrumentation
The time constant of a first order process with resistance R and capacitance C is

R - C
R + C
RC
1/RC

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Process Control and Instrumentation
Liquid discharge from a tank or reservoir can not be measured by

Notches
Orificemeters
Mouthpieces
Weirs

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

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

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Process Control and Instrumentation
Measurement of sub-zero Celcius temperature in industry is done most commonly by

Resistance thermometers
Thermocouples
Bi-metallic thermometers
Gas thermometers

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