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Process Control and Instrumentation

Process Control and Instrumentation
Reset rate is the another term used for __________ time.

Integral
None of these
Derivative
Dead

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Process Control and Instrumentation
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-38.9
-80.9
-11.9
-60.9

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Process Control and Instrumentation
__________ is undesirable in thermocouples used in industries,

Corrosion resistance
Non-linear relation of emf to temperature
Oxidation resistance
Linear relation of emf to temperature

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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

- ∞, π/2
0, π/2
-π/2, 0
-π/2, π/2

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Process Control and Instrumentation
Instrumentation in a plant offers the advantage of

Greater safety of operation
All of these
Greater operation economy
Better quality of product

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

> 3
< 1
< 0.1
< 3

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