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Process Control and Instrumentation

Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

1/(τds + 1)
E-τds
Τds + 1
Eτds

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Process Control and Instrumentation
The fluid used in hydraulic controller is

Water
Oil
Air
Steam

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Process Control and Instrumentation
Meleoid gauge measures the __________ pressure.

Very high
Positive
Atmospheric
Sub-atmospheric

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Process Control and Instrumentation
The transfer function for a P-D controller is

Kc τD s
Kc/τD s
Kc(1 +1/τD s)
Kc(1+τD s)

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Process Control and Instrumentation
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

None of these
Mercury thermometer
Bimetallic thermometer
Radiation pyrometer

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Process Control and Instrumentation
__________ is the static characteristics of an instrument,

Drift
Tine lag
Response
Dynamic error

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