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Process Control and Instrumentation

Process Control and Instrumentation
Characteristic equation is the denominator of __________ loop transfer function.

Open
Neither A Nor B Here
Closed
Both A & B Here

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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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Process Control and Instrumentation
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

Peltier effect
Joule heating effect
Thomson effect
Seebeck effect

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Process Control and Instrumentation
In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is

H/G
G/H
G/(1 + H)
H(1 + G)

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Oil
Steam
Air
Water

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Process Control and Instrumentation
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Fahrenheit
Reaumer
Centigrade
Kelvin

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