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Process Control and Instrumentation

Process Control and Instrumentation
The amplitude ratio for the sinusoidal response of a __________ is 1.

First order system
Transportation lag
None of these
Second order system

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is

None of these
Linear expansion
Pressure rise with temperature
Volumetric expansion

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

Chromatograph
Both B and C
Mass spectrometer
Haldane apparatus

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Process Control and Instrumentation
Which of the following judges the accuracy of an instrument?

Dead zone
Static error
Drift
None of these

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Process Control and Instrumentation
The transfer function of a pure dead time system with dead time τd is

Τds + 1
E-τds
Eτds
1/(τds + 1)

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Process Control and Instrumentation
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?

Platinum-platinum + rhodium
Chromel-alumel
Iron-constantan
Copper-constantan

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