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Process Control and Instrumentation

Process Control and Instrumentation
Transfer function of transportation lag is

ETS
1/(TS + 1)
E-TS
None of these

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Process Control and Instrumentation
To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with

Oil
Air
A metal powder or graphite
Mercury

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

None of these
Volumetric expansion
Linear expansion
Pressure rise with temperature

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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?

Peltier effect
Seebeck effect
Thomson effect
Joule heating effect

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Process Control and Instrumentation
The frequency response of a first order system, has a phase shift with lower and upper bounds given by

0, π/2
-π/2, 0
- ∞, π/2
-π/2, π/2

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Process Control and Instrumentation
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

Semi-log
Ordinary
Triangular
Log-lag

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