Mechanical Engineering : Process Instrumentation And Control QUESTIONS AND ANSWERS :: part3 : 21 to 25
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
21.For an orfice plate having ratio of inside and pipe diameter as 0.5, the pressure loss in comparison to differential pressure created is of the order of : |
| 5% |
| 10% |
| 20% |
| 35% |
| 50%. |
22.Dynamometers are : |
| force measuring devices |
| torque measuring devices |
| power measuring devices |
| energy measuring devices |
| displacement measuring devices. |
23.For measuring air flow, following meter is often used : |
| vane-type or anemometer |
| electro magnetic flow meter |
| vortex-shedding meter |
| ultrasonic flow meter |
| pitot tube. |
24.Pick up false statement: |
| copper-constantan thermocouple is a stable couple resistant to both oxidis�ing and reducing atmosphere, but needs protection from acidic vapours |
| Iron-constantan thermocouple suffers from oxidation attack on iron wire, if exposed |
| iron-constantant couple can be made stable by using enamelled iron |
| Both wires of chromel-alumel ther-mocouples are prone to damage by sulphurous gases |
| copper-constantan thermocouple is used as a reference standard for calibration purposes. |
More Process Instrumentation And Control QUESTIONS AND ANSWERS available in next pages
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