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Process Control and Instrumentation

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

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

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Process Control and Instrumentation
Dome temperature of blast furnace stove is most accurately measured by a

Radiation pyrometer
Iron-constantan thermocouple
Platinum resistance thermometer
Platinum-platinum/rhodium ther-mocuple

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Process Control and Instrumentation
Zirconia probe is used for the measurement of

Speed of a submarine
Humidity of air
% CO₂ in flue gas
% O₂ in flue gas

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Process Control and Instrumentation
__________ type of element is normally not used in the bimetallic thermometers.

Multiple helix
Flat spiral
Single helix
Bourdon tube

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Process Control and Instrumentation
Thermistors are made of

Iron-copper alloys
Metal oxides
Nickel-chromium alloys
Ultra pure metals

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Process Control and Instrumentation
Which of the following thermocouples has the widest temperature measurement range?

Platinum-platinum/rhodium
Chromel-alumel
Copper-constantan
Iron-constantan

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