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Process Control and Instrumentation

Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Flow rate
Heat content of the system
Liquid volume in the tank
Level of liquid

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Process Control and Instrumentation
A simple pitot tube measures the

Point velocity
Static pressure
Maximum velocity
Average velocity

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Process Control and Instrumentation
The transfer function for a P-D controller is

Kc τD s
Kc(1+τD s)
Kc/τD s
Kc(1 +1/τD s)

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

Critically damped
Highly fluctuating
Underdamped
Overdamped

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Process Control and Instrumentation
All the thermocouples used for temperature measurement use dissimilar metal

Beads
Wires
Bars
Strips

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Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

44020
-1
1
43838

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