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Process Control and Instrumentation

Process Control and Instrumentation
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .

< 10 (gage)
< 3 (gage)
> 2(gage)
< atmospheric

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Process Control and Instrumentation
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Nickel
Brass
Invar
Chromel

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Process Control and Instrumentation
Composition of natural gas is determined by the

Both B and C
Chromatograph
Haldane apparatus
Mass spectrometer

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Process Control and Instrumentation
Bode diagram is a plot of

Log (AR) vs. f and log Φ vs.f
AR vs. log (f) and Φ vs. log (f)
Log (AR) vs. log (f) and (Φ) vs. log (f)
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
> 100
< 0
0-100

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Process Control and Instrumentation
Response of a system to a sinusoidal input is called __________ response.

Impluse
Frequency
None of these
Unit step

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