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Process Control and Instrumentation

Process Control and Instrumentation
What is the Laplace transform of sin t ?

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

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Process Control and Instrumentation
Pick out the one which is a first order instrument.

Bare vapor pressure thermometer
Bare metallic thermometer
Mercury in glass thermometer (without any covering or air gap)
All of these

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Process Control and Instrumentation
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

Seebeck effect
Thomson effect
Peltier effect
Joule heating effect

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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.

Nitrogen
None of these
Helium
Hydrogen

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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
A non-linear system will have __________ steady state values.

Two
More than one
Three
One

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