Chemical Engineering - Process Control and Instrumentation
Exercise :: Process Control and Instrumentation - Section 1
| 46. |
The __________ of a vapor pressure thermometer is a secondary element. |
| A. |
pointer | | B. |
Bourdon tube | | C. |
bulb | | D. |
none ofthese |
Answer: Option B
Explanation:
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| 47. |
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is |
| A. |
chromel-alumel | | B. |
iron-constantan | | C. |
platinum-platinum+rhodium | | D. |
either (a), (b) or (c) |
Answer: Option C
Explanation:
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| 48. |
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit? |
| A. |
Seebeck effect | | B. |
Peltier effect | | C. |
Joule heating effect | | D. |
Thomson effect |
Answer: Option B
Explanation:
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| 49. |
The second order system with the transfer function  has a damping ratio of |
Answer: Option B
Explanation:
|
| 50. |
In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the __________ variable. |
| A. |
load | | B. |
controlled | | C. |
manipulated | | D. |
none of these |
Answer: Option C
Explanation:
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