Mechanical Engineering : Process Instrumentation And Control QUESTIONS AND ANSWERS :: part3 : 11 to 15
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
11.In calibration of temperature sensors by fixed point method, the device is calibrated at: |
| ice point (0�C) |
| steam point (100�C) |
| sulphur point (444.6�C) |
| all of the above |
| none of the above. |
12.Pick out false statement about advantages of orifice plates, used for flow measurement : |
| no moving parts |
| long-term reliability |
| highturn-down ratio |
| inexpensive |
| inherently simple in operation. |
13.Pick out false statement about disadvantages of orifice plates : |
| square root relationship |
| poor turn-down ratio |
| critical installation requirements |
| short-term reliability |
| high irrecoverable pressure loss. |
14.Vena-contracta taps are employed : |
| D upstream and D downstream from the plate |
| D upstream and at vena contracta |
| 2 D upstream and at vena contracta |
| just at surface of plate upstream and at vena contracta |
| any one of the above. |
15.To prevent self-heating errors becoming too great, the current through platinum element (100 ohm) is kept at a very small value : |
| 0.1 raA |
| 1 mA |
| 5 mA |
| 20 mA |
| 50 mA. |
More Process Instrumentation And Control QUESTIONS AND ANSWERS available in next pages
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