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Process Control and Instrumentation

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

Fidelity
Sensitivity
Dead zone
Reproducibility

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Process Control and Instrumentation
Flapper nozzle is used in a/an __________ controller.

Electronic
Hydraulic
None of these
Pneumatic

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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
Peltier
Seebeck
Thomson

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Process Control and Instrumentation
Thermal wells used in temperature measurements should have

Polished surface
Low emissivity
Very thick walls
High transmissivity of radiation

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is

Chromel-alumel
Iron-constantan
Platinum-platinum+rhyodium
Platinum-rhodium

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Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

20
40
50
30

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