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| Q. |
What causes failure of boiler tube? |
| A. | heating the tubes, when desired water level is not maintained |
| B. | induced pressure in the water |
| C. | over use of boiler |
| D. | hardness of water |
| Answer» D. hardness of water | |
| Explanation: hardness of water causes failure of boiler tube. hard water consists of calcium and magnesium salts. hardness in water will form deposits on the tube water surfaces which will lead to overheating and failure of tubes. thus the salts have to be removed from the water. | |
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