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PROCESS CONTROL AND INSTRUMENTATION

Process Control and Instrumentation
Working principle of radiation pyrometer is based on the

Stafan-Boltzman law
Kirchoffs law
Wien's law
Seebeck effect

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Process Control and Instrumentation
Which of the following is never used as an element of industrial resistance thermometer?

30% iron + 70% nickel
Copper
Nickel
Lead

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Process Control and Instrumentation
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.

Decrease
Exponential decrease
Increase
No change

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Process Control and Instrumentation
On-off controllers are normally used for

Flow rate changes
Temperature changes
Low loads
None of these

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Process Control and Instrumentation
A pyranometer is an instrument used for measuring the

Global radiation
Bright sunshine period
None of these
Beam radiation

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