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Process Control and Instrumentation

Process Control and Instrumentation
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is

36
12
54
68

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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.

Load
Manipulated
None of these
Controlled

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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

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

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

None of these
Load
Controlled
Manipulated

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Process Control and Instrumentation
Which of the following is not the triple point of water?

492°R
32°R
32°F
273°K

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Process Control and Instrumentation
pH meter has

Two cells
One cell
Three cells
No cell

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