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Process Control and Instrumentation

Process Control and Instrumentation
In an exothermic chemical reactor, the manipulated variable is the flow rate of

None of these
Product
Reactants
Coolant

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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?

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

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Process Control and Instrumentation
Thermal wells are used in the temperature measurement to

Reduce measuring lag
Guard against corrosive and oxidising action on thermocouple materials
Increase the fidelity
Increase the sensitivity

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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

43838
-1
1
44020

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Process Control and Instrumentation
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Reaumer
Kelvin
Centigrade
Fahrenheit

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Process Control and Instrumentation
Stalagmometer is used for the measurement of

Optical activity
Surface tension
Kinematic viscosity
Refractive index

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