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Process Control and Instrumentation

Process Control and Instrumentation
Identify an unbounded input from inputs whose transfer functions are given below

1/S²
1/S
1
1/(S² + 1)

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Process Control and Instrumentation
Continuous measurement of specific gravity of a liquid is done by

Contact-type electric indicators
Hydrometer
Both A and C
Displacement meter

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Process Control and Instrumentation
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an

Either B or C
Radiation pyrometer
Optical pyrometer
Chromel-alumel thermocouple

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Process Control and Instrumentation
0n-off control which is a special case of proportional control, has a band width of about __________ percent.

75
25
100

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

Tine lag
Response
Dynamic error
Drift

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Process Control and Instrumentation
Which of the following is the dynamic characteristics of an instrument?

Sensitivity
Dead zone
Reproducibility
Fidelity

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