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Process Control and Instrumentation

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

1
4
3
2

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Process Control and Instrumentation
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Fahrenheit
Centigrade
Reaumer
Kelvin

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Process Control and Instrumentation
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.

< 100
< 0
> 0
> 800

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Process Control and Instrumentation
Range of hydrogen gas constant volume themometer is __________ °C.

400 - 1000
100 - 500
0 to 100
-10 to 20

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Process Control and Instrumentation
Polarisation of light forms the working principle of a

Spectrometer
Polarimeter
Chromatograph
Polarograph

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Process Control and Instrumentation
__________ stability method uses open loop transfer function.

None of these
Nyquist
Ruth
Mikhalov

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