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Process Control and Instrumentation

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

Temperature changes
None of these
Low loads
Flow rate changes

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Process Control and Instrumentation
Feed forward controller accounts for the __________ changes.

Neither A nor B
Load
Set point
Both A & B

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Process Control and Instrumentation
Non-metallic diaphragm used as pressure sensor in instruments is generally made of

Bakelite
Thick paper
Synthetic rubber
Teflon

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Process Control and Instrumentation
When the damping co-efficient (ξ) is unity, the system is

Overdamped
Critically damped
Underdamped
Highly fluctuating

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Process Control and Instrumentation
__________ controller has the maximum stabilising time.

PD
PI
P
PID

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Process Control and Instrumentation
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

High viscosity index
Low thermal conductivity
Low electrical conductivity
Low flash point

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