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Process Control and Instrumentation

Process Control and Instrumentation
Working principle of mercury in glass thermometer is

Pressure rise with temperature
Volumetric expansion
Linear expansion
None of these

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Process Control and Instrumentation
The transfer function for a P-D controller is

Kc/τD s
Kc τD s
Kc(1+τD s)
Kc(1 +1/τD s)

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Vapor pressure thermometer
Mercury in glass thermometer
Thermocouple
Reistance thermometer

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Process Control and Instrumentation
Routh stability method uses __________ loop transfer function.

Closed
Either A or B
Open
Neither A nor B

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Process Control and Instrumentation
Mercury thermometer can be used to measure the temperature upto __________ °C.

350
750
250
100

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Process Control and Instrumentation
Response of a system to a sinusoidal input is called __________ response.

Impluse
Unit step
None of these
Frequency

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