Chemical Engineering - Process Control and Instrumentation
Exercise :: Process Control and Instrumentation - Section 1
| 26. |
Temperature measuring instruments are standardised mostly with __________ points of pure substances. |
| A. |
melting | | B. |
boiling | | C. |
both (a) & (b) | | D. |
neither (a) nor (b) |
Answer: Option C
Explanation:
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| 27. |
Pick out the first order system from among the following. |
| A. |
Damped vibrator. | | B. |
Mercury in glass thermometer kept in boiling water. | | C. |
Interacting system of two tanks in series. | | D. |
Non-interacting system of two tanks in series. |
Answer: Option B
Explanation:
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| 28. |
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C. |
Answer: Option B
Explanation:
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| 29. |
Which of the following controllers has the least maximum deviation ? |
| A. |
P-controller | | B. |
P-I controller | | C. |
P-I-D controller | | D. |
P-D controller |
Answer: Option D
Explanation:
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| 30. |
Volumetric expansion is the working principle of the __________ thermometers. |
| A. |
mercury in glass | | B. |
constant volume gas | | C. |
vapor pressure | | D. |
bimetallic |
Answer: Option A
Explanation:
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