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Process Control and Instrumentation

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

800
1200
1500
400

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Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Either A, B or C
Platinum-platinum+rhodium
Chromel-alumel
Iron-constantan

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Process Control and Instrumentation
Bourdon gauges are used for measuring pressure (kg/cm² )

> 10 (absolute)
< 2 (gauge)
< atmospheric
> 2 (gauge)

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Process Control and Instrumentation
Phase margin is equal to

Phase lag + 180°
Phase lag - 180°
Phase lag + 90°
180° - phase lag

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Process Control and Instrumentation
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?

0.1
13
29
3

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Process Control and Instrumentation
Strain gage pressure transducers are used to measure __________ pressures.

Both A & B Here
Gage as well as vacuum
Absolute as well as differential
Neither A nor B

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