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Process Control and Instrumentation

Process Control and Instrumentation
Response of a system to a sinusoidal input is called __________ response.

Impluse
None of these
Unit step
Frequency

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

1
1/S²
1/S
1/(S² + 1)

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Process Control and Instrumentation
Nichol's chart deals with

R. vs. phase lag of first order
Frequency response values of controllers
R. vs. phase lag of second order
Closed loop values vs. open loop values

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

CSTR with first order reaction
U-tube manometer
Spring loaded diaphragm valve
Thermocouple kept immersed in a liquid filled thermowell

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Process Control and Instrumentation
Composition of natural gas is determined by the

Chromatograph
Mass spectrometer
Both B and C
Haldane apparatus

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Increase of pressure
Volumetric expansion
Increase of thermal conductivity
Differential linear expansion

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