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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
1/(S² + 1)
1/S
1/S²

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Process Control and Instrumentation
Optical activity of a solution can be determined using a

Refractrometer
Polarograph
Polarimeter
Dilatometer

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Process Control and Instrumentation
Emission spectroscopy is used for

Determining water purity
NOxdetermination
Determination of CO₂ in gases
Solids and metal analysis

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Process Control and Instrumentation
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

Radiation pyrometer
Thermocouple
Bimetallic thermometer
Mercury thermometer

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Process Control and Instrumentation
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an

Liquid semi-conductor
Insulator
Conductor
Solid semi-conductor

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Process Control and Instrumentation
Meleoid gauge measures the __________ pressure.

Very high
Atmospheric
Positive
Sub-atmospheric

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