Chemical Engineering - Process Control and Instrumentation
Exercise :: Process Control and Instrumentation - Section 1
| 31. |
Which of the following measurements can be made by the measurement of emf ? |
| A. |
pH value | | B. |
Degree of hydrolysis | | C. |
Composition of complex ions | | D. |
All (a), (b) & (c) |
Answer: Option D
Explanation:
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| 32. |
A magnetic flowmeter is |
| A. |
based on the principle of Faraday's law. | | B. |
capable of measuring the flow rate of slurries and electrolytes. | | C. |
based on the linear relationship between the fluid flow rate and the induced voltage. | | D. |
all (a), (b) and (c). |
Answer: Option D
Explanation:
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| 33. |
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace. |
| A. |
oxygen in | | B. |
carbon dioxide in | | C. |
carbon monoxide in | | D. |
temperature of |
Answer: Option A
Explanation:
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| 34. |
Strain gage pressure transducers are used to measure __________ pressures. |
| A. |
gage as well as vacuum | | B. |
absolute as well as differential | | C. |
both (a) and (b) | | D. |
neither (a) nor (b) |
Answer: Option C
Explanation:
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| 35. |
The transfer function for a PID controller is (where, τ i is the integral (reset) time and τD is the derivative time.) |
Answer: Option B
Explanation:
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