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Process Control and Instrumentation

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

Transportation lag
Second order system
First order system
None of these

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Process Control and Instrumentation
Thermistors are used in __________ devices.

Voltage measuring
Temperature measuring
Temperature compensating
Both B & C

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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
3
29
13

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Process Control and Instrumentation
On-off controllers are normally used for

Low loads
Flow rate changes
Temperature changes
None of these

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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
Instrumentation in a plant offers the advantage of

Greater operation economy
Better quality of product
Greater safety of operation
All of these

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