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Process Control and Instrumentation

Process Control and Instrumentation
Which thermocouple can be used to measure a temperature of around 1400°C ?

Platinum-platinum+rhodium
None of these
Aluminium-chromel
Copper-constantan

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Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

-1
1
∞

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Process Control and Instrumentation
Phase lag of the sinusoidal response of a first order system is

180°
90°
120°
30°

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Process Control and Instrumentation
Which of the following is not classified as a thermo electric pyrometer

Optical pyrometer (disappearing filament type)
Resistance thermometer
Thermocouple
Radiation pyrometer

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Process Control and Instrumentation
Flow rate through an orifice is __________ the pressure differential.

Proportional to the square root of
Proportional to
Inversely proportional to the square of
Inversely proportional to the square root of

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

500
750
250
1000

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