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Process Control and Instrumentation

Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

32° & 80°
0° & 80°
- 273° & 80°
32° & 460°

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Process Control and Instrumentation
In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.

Manipulated
Controlled
None of these
Load

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

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

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Process Control and Instrumentation
Flapper nozzle is used in a/an __________ controller.

Pneumatic
None of these
Electronic
Hydraulic

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Process Control and Instrumentation
Number of poles in a system with transfer function 1/(s² + 2s² + 1) is

3
1
2
5

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

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