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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Outlet flow rate
Both A & B Here
Level
Neither A nor B Here

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Process Control and Instrumentation
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?

13
29
0.1
3

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Process Control and Instrumentation
Phase lag of the frequency response of a second order system to a sinusoidal forcing function

Is 90° at the most
Is 30°
Approaches 180° asymptotically
Is 120°

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Process Control and Instrumentation
Pirani gauge is used for the measurement of

High vacuum
Liquid level under pressure
Very high pressure
Liquid level at atmospheric pressure

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Process Control and Instrumentation
0n-off control which is a special case of proportional control, has a band width of about __________ percent.

100
75
25

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Process Control and Instrumentation
A barometer measures the __________ pressure.

Absolute as well as gauge
Absolute
Dynamic
Gauge

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