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Process Control and Instrumentation

Process Control and Instrumentation
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'

Celcius
Rankine
Reumur
Farenhite

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Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Iron-constantan
Either A, B or C
Chromel-alumel
Platinum-platinum+rhodium

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Process Control and Instrumentation
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

2
4
1
3

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Process Control and Instrumentation
__________ controller has the maximum stabilising time.

PID
P
PD
PI

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Process Control and Instrumentation
Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing

Nitrogen
None of these
Helium
Hydrogen

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Process Control and Instrumentation
Compositional analysis of __________ is done using mass spectrometer.

An alloy
A solid
An isotope
Natural gas

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