Process Control and Instrumentation
A bolometer is

Used for the measurement of thermal radiation
Both A & B Here
Neither A nor B Here
An element which senses optical input and delivers thermal output

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Process Control and Instrumentation
Routh test

Can not determine as to how many roots of the characteristics equation have positive real roots
Cannot be used to test the stability of a control system containing transportation lag
Criterion is not applicable to systems with polynomial characteristic equation
Criterion provides information about the actual location of roots

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