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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Neither A nor B Here
Outlet flow rate
Both A & B Here
Level

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

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

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Process Control and Instrumentation
Flow rate through an orifice is __________ the pressure differential.

Inversely proportional to the square of
Inversely proportional to the square root of
Proportional to
Proportional to the square root of

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Process Control and Instrumentation
Which of the following is the dynamic characteristics of an instrument?

Fidelity
Reproducibility
Dead zone
Sensitivity

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Process Control and Instrumentation
A first order system with unity gain and time constant τ is subjected to a sinusoidal input of frequency w = 1/τ. The amplitude ratio for this system is

1
0.25
1/√2
0.5

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Process Control and Instrumentation
The closed loop pole of a stable second order system could be

One real positive and the other real negative
Complex conjugate with positive real parts
Both real and negative
Both real and positive

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