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Process Control and Instrumentation

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

R - C
1/RC
RC
R + C

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

Product
Reactants
Coolant
None of these

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Millivolts
Volts
Microvolts
Kilo volts

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Process Control and Instrumentation
Liquid argon level in a pressurised storage tank (at 3 kg/cm² ) is measured by a/an

Differential pressure gage
Gage glass
None of these
External float gage

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Process Control and Instrumentation
Identify an unbounded input from inputs whose transfer functions are given below

1
1/S²
1/S
1/(S² + 1)

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Process Control and Instrumentation
A simple pitot tube measures the

Point velocity
Maximum velocity
Average velocity
Static pressure

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