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Process Control and Instrumentation

Process Control and Instrumentation
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

1000
750
500
250

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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
1
3
4

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Process Control and Instrumentation
Optical activity of a solution can be determined using a

Polarimeter
Polarograph
Refractrometer
Dilatometer

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Process Control and Instrumentation
Change of angle of refraction with composition comprises the working principle of a

Refractrometer
Spectrometer
Polarimeter
Polarograph

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Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

< 1.7 and < 30°
> 1.7 and > 30°
< 1.7 and > 30°
> 1.7 and < 30°

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Process Control and Instrumentation
The __________ of a vapor pressure thermometer is a functioning element.

Bourdon tube
Bulb
Pointer
None of these

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