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Process Control and Instrumentation

Process Control and Instrumentation
Working principle of disappearing filament type optical pyrometer is based on the

Wien's law
Peltier effect
Seebeck effect
Kirchoff's law

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Process Control and Instrumentation
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a

Large area but small mass
Small specific heat
High thermal conductivity
All of these

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Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

800-1600
800-2500
400-1000
400-1600

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Process Control and Instrumentation
Emission spectroscopy is used for

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

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Process Control and Instrumentation
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is

1 + et
1 - et
1 - e-t
1 + e-t

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 1
< 3
< 0.1
> 3

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