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Process Control and Instrumentation

Process Control and Instrumentation
Paramagnetism method is not used for the composition determination of __________ in gases.

Oxides of nitrogen
Oxygen
Carbon dioxide
Any of these

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Process Control and Instrumentation
Which of the systems having following transfer functions is stable?

1/(s²-2s + 3)
Exp(-20s)/(s² + 2s-l)
1/(s²+ 2)
1/(s² + 2s + 2)

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Process Control and Instrumentation
Phase lag of the sinusoidal response of a first order system is

180°
120°
90°
30°

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

Manipulated
None of these
Controlled
Load

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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
None of these
Load
Controlled

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Process Control and Instrumentation
Which of the following does not figure in the list of seven substances selected for international temperature scale?

Antimony and silver (F.P)
Zinc (B.P) and mercury (F.P)
Oxygen and sulphur (B.P)
Ice (F.P) and steam (B.P)

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