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| Q. |
What is the function of fusible plug in the boiler? |
| A. | protect the fire tube |
| B. | to trip on overload |
| C. | to act as a junction switch |
| D. | to maintain pressure |
| Answer» A. protect the fire tube | |
| Explanation: the function of the fusible plug is to protect the fire tube from burning due to excessive heating. this usually happens when the water level inside the drum becomes too low and the shell and crown plate are directly exposed to steam space. | |
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