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Process Control and Instrumentation

Process Control and Instrumentation
Configuration of Bourdon spring tube is never made of __________ shape.

Circular
Semi-circular
Spiral
Helical

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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.

Reaumer
Kelvin
Fahrenheit
Centigrade

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

CO₂
NO₂
O₂
NO

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Process Control and Instrumentation
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an

Chromel-alumel thermocouple
Either B or C
Optical pyrometer
Radiation pyrometer

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Process Control and Instrumentation
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?

< 1
1
None of these
>1

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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

1
2
3
4

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