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Process Control and Instrumentation

Process Control and Instrumentation
Gas chromatography is used for the measurement of

Pressure
Temperature
Concentration
Flow rate

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Process Control and Instrumentation
Thermocouple is suitable for measuring

Both high and low temperatures
Liquid temperatures only
Very low temperatures only
Very high temperatures only

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Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

None of these
Seebeck
Thomson
Peltier

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Process Control and Instrumentation
For measuring the temperature of a red hot furnace, which is the most suitable instrument?

Optical pyrometer
Bimetallic thermometer
Platinum resistance thermometer
Thermocouple

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Process Control and Instrumentation
Number of poles in a system with transfer function 1/(s² + 2s² + 1) is

1
3
5
2

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Process Control and Instrumentation
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

D³
D²
D⁴
D

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