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Process Control and Instrumentation

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

Mercury thermometer
Bimetallic thermometer
Radiation pyrometer
None of these

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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.

Thomson
None of these
Peltier
Seebeck

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Process Control and Instrumentation
Which of the following is a 'contact' pyrometer?

Optical pyrometer
Resistance pyrometer
Radiation pyrometer
Infra red pyrometer

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Process Control and Instrumentation
__________ are analysed using a polarograph.

Isotonic solutions
Gases
Solids
Liquids

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Process Control and Instrumentation
The open loop transfer function of a control system is KR/(1 + TS) . This represents

Dead time system
A second order system
A first order system
A first order time lag

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Process Control and Instrumentation
Flow rate of sludge is not measured by a/an

Both B & C
Open weir
Kennison nozzle
Orificemeter

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