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Process Control and Instrumentation

Process Control and Instrumentation
Bourdon tube is never made of

Monel metal
Cast iron
Stainless steel
Phosphor bronze

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

Reactants
None of these
Product
Coolant

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Process Control and Instrumentation
The time constant of a first order process with resistance R and capacitance C is

RC
1/RC
R + C
R - C

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Process Control and Instrumentation
Instrumentation in a plant offers the advantage of

Greater safety of operation
Greater operation economy
Better quality of product
All of these

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

NO₂
O₂
CO₂
NO

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Process Control and Instrumentation
__________ stability method uses open loop transfer function.

Nyquist
None of these
Mikhalov
Ruth

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