Process Control and Instrumentation
Select the correct statement from the following.

The phase lag of a pure time delay system decreases with increasing frequency
The amplitude ratio of a pure capacity process is inversely proportional to frequency
The amplitude ratio of a pure time delay system increases with frequency
The frequency response of a pure capacity process is unbounded

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Process Control and Instrumentation
In a second order under damped system, the

Decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot
None of these
Overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e
Time required for the response of first reach its ultimate value is called the response time

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