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Process Control and Instrumentation

Process Control and Instrumentation
The transfer function of a first order system is

1/(Ts + 1)
S/(Ts + 1)
1/Ts
None of these

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Process Control and Instrumentation
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

Radiation pyrometer
Mercury thermometer
Thermocouple
Bimetallic thermometer

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Process Control and Instrumentation
Bode diagram is a plot of

Log (AR) vs. log (f) and (Φ) vs. log (f)
Log (AR) vs. f and log Φ vs.f
AR vs. log (f) and Φ vs. log (f)
None of these

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

Refractrometer
Polarimeter
Spectrometer
Polarograph

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Process Control and Instrumentation
Use of I-control along with P-control facilitates

Reduction of offset
Elimination of offset
Reduction of stability time
None of these

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Process Control and Instrumentation
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.

> 50
< 0
> 100
0-100

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