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Process Control and Instrumentation

Process Control and Instrumentation
For an input forcing function, X(t) = 2t², the Laplace transform of this function is

4/s²
4/s³
2/s³
2/s²

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Process Control and Instrumentation
Emission spectroscopy is used for

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

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

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Process Control and Instrumentation
Silver point temperature is __________ °C.

760.5
1060.5
860.5
960.5

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Process Control and Instrumentation
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.

Hydrogen
Helium
None of these
Nitrogen

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Process Control and Instrumentation
Which of the following is not a composition measuring instrument?

Mass spectrometer
Hot wire anemometer
Thermal conductivity cell
Polarograph

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