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Process Control and Instrumentation

Process Control and Instrumentation
Positioning controllers are used for

Low loads
Temperature changes
Flow rate changes
High loads

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Process Control and Instrumentation
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is

1 + e-t
1 - e-t
1 - et
1 + et

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Process Control and Instrumentation
Turbine flow meters are suitable for

Very limited flow ranges
Aerospace and in air borne applications
Both B and C
Cryogenic flow measurements

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

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

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Process Control and Instrumentation
Which thermocouple can be used to measure a temperature of around 1400°C ?

Copper-constantan
None of these
Platinum-platinum+rhodium
Aluminium-chromel

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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
Load
Manipulated
Controlled

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