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Process Control and Instrumentation

Process Control and Instrumentation
Starting temperature of optical radiation pyrometer is __________ °C.

1200
400
1500
800

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Process Control and Instrumentation
Which of the following is the dynamic characteristics of an instrument?

Dead zone
Reproducibility
Fidelity
Sensitivity

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

Static error
Drift
Dead zone
None of these

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Process Control and Instrumentation
Which of the systems having following transfer functions is stable?

1/(s² + 2s + 2)
1/(s²+ 2)
Exp(-20s)/(s² + 2s-l)
1/(s²-2s + 3)

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Process Control and Instrumentation
Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing

Nitrogen
Helium
None of these
Hydrogen

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Process Control and Instrumentation
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

Conductors
Semi conductors
Insulators
Dielectrics

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