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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 7
16.
A control system has the following transfer function

The initial value of the corresponding time function is
1
1/8
7/8
-1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
For measuring the temperature of a red hot furnace, which is the most suitable instrument ?
Platinum resistance thermometer
Thermocouple
Optical pyrometer
Bimetallic thermometer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Continuous measurement of specific gravity of a liquid is done by
hydrometer
contact-type electric indicators
displacement meter
both (a) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Stroboscope is used for the measurement of
rpm of a flywheel
frequency of light
depression of freezing point
liquid level under pressure
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function will have a definite num-ber of loci for variation of K from 0 to ∞. The number of loci is
1
3
4
2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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