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Process Control and Instrumentation

Process Control and Instrumentation
Measurement of pressure in ammonia reactor is done by

Inclined tube manometer
Pirani guage
U-tube manometer
Bourdon gauge

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Process Control and Instrumentation
In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable.

None of these
Controlled
Manipulated
Load

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

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Process Control and Instrumentation
Which is the most suitable instrument for measuring pressure below 3 microns?

Mcleoid gauge
Alphatron
Bourdon guage
Ionisation gauge

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Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

∞
-1
1

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Process Control and Instrumentation
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its

Static characteristics
Fidielity
Reproducibility
Speed of response

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