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Process Control and Instrumentation

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

Load
None of these
Controlled
Manipulated

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

Open
Neither A nor B Here
Either A Or B Here
Closed

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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)
G/H
H(1 + G)

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Process Control and Instrumentation
Which of the following thermocouples has the widest temperature measurement range?

Chromel-alumel
Copper-constantan
Platinum-platinum/rhodium
Iron-constantan

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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
A bolometer is

An element which senses optical input and delivers thermal output
Used for the measurement of thermal radiation
Neither A nor B Here
Both A & B Here

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