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Process Control and Instrumentation

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

Neither A nor B
Load
Both A & B
Set point

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Process Control and Instrumentation
If response of a control system is to be free of offset and oscillation, the most suitable controller is

Proportional-derivative(PD)controller
Proportional controller
Proportional-integral (PI) controller
Proportional integral-derivative (PID) controller

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Process Control and Instrumentation
An amplitude ratio of 0.1 corresponds to __________ decibels.

-10
-20
10
20

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Process Control and Instrumentation
Which of the following flow-metering instru-ments is an areameter?

Hot wire anemometer
Venturimeter
Pitot tube
Rotameter

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Process Control and Instrumentation
Zirconia probe is used for the measurement of

Speed of a submarine
% CO₂ in flue gas
Humidity of air
% O₂ in flue gas

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Process Control and Instrumentation
What is the Laplace transform of sin t ?

1/(s² + 1)
S/(s² + 1)
1/(s² - 1)
S/(s² - 1)

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