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Process Control and Instrumentation

Process Control and Instrumentation
Polarisation of light forms the working principle of a

Chromatograph
Polarimeter
Polarograph
Spectrometer

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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
What is the Laplace transform of sin t ?

S/(s² + 1)
1/(s² - 1)
1/(s² + 1)
S/(s² - 1)

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Process Control and Instrumentation
Out of the following themocouple wire insulating material, the highest temperature rating is for

Ceramic fibre
Asbestos
Teflon
Fibre glass

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Process Control and Instrumentation
Dead zone in an instrument must be less than __________ percent of the scale.

4
0.2
8
1.5

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Iron-constantan
Chromel-constantan
Platinum-platinum + rhodium
All of these

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