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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 7
21.
In second order underdamped system,
decay ratio = overshoot
decay ratio = (overshoot)2
overshoot increases for increasing damping co-efficient.
large damping co-efficient means smaller damping.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Dome temperature of blast furnace stove is most accurately measured by a
radiation pyrometer.
platinum-platinum/rhodium ther-mocuple.
iron-constantan thermocouple.
platinum resistance thermometer.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Phase lag of the sinusoidal response of a first order system is
120°
30°
180°
90°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Continuous measurement of moisture content of paper in paper industry is done by measuring the
thermal conductivity through the paper
electrical resistance through the paper
magnetic susceptibility
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.
steel
vycor (a glass)
nichrome
inconel
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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