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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 4
26.
A system with a double pole at the origin is unstable since the corresponding term in the time domain
is a constant.
grows exponentially with time.
grows linearly with time.
decays linearly with time.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with
air
a metal powder or graphite
oil
mercury
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
In a second order under damped system, the
time required for the response of first reach its ultimate value is called the response time.
overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e.
decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot.
characteristics of a step response is represented by
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In an exothermic chemical reactor, the manipulated variable is the flow rate of
coolant
reactants
product
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
0.0001
0.001
0.01
0.1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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