Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change?

Mercury
Carbon-tetrachloride
Water
Methyl alcohal

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

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

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