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Process Control and Instrumentation

Process Control and Instrumentation
The temperature range for which copper resistance thermometer can be used is __________ °C

0 to 150
350 to 750
500 to 900
-200 to 150

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Process Control and Instrumentation
Phase margin is equal to

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

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Process Control and Instrumentation
Measurement of pressure in ammonia reactor is done by

Pirani guage
Bourdon gauge
Inclined tube manometer
U-tube manometer

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Both B & C
Voltage measuring
Temperature measuring
Temperature compensating

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Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

32° & 460°
0° & 80°
- 273° & 80°
32° & 80°

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Process Control and Instrumentation
Which of the following thermocouples has the widest temperature measurement range?

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

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