Question 104Steam Plants - Assistant Engineer
70% to passThe correct method of expanding a generating tube at the boiler drum tube sheet is to roll _______________.
Ato a depth greater than the thickness of the drum tube sheet
Bslightly at the tube end prior to welding the tube to the drum tube sheet
Cto a depth less than the thickness of the drum tube sheet
Dheavily at the tube end prior to welding the tube to the drum tube sheet
AI Explanation
The correct answer is A) to a depth greater than the thickness of the drum tube sheet. The correct method of expanding a generating tube at the boiler drum tube sheet is to roll the tube to a depth greater than the thickness of the drum tube sheet. This ensures a tight, secure fit between the tube and the tube sheet, preventing leaks and improving the overall integrity of the boiler system. Rolling the tube to a depth less than the thickness of the drum tube sheet (option C) would not provide a sufficient seal, while rolling it heavily or slightly at the tube end prior to welding (options D and B) are not the recommended techniques.
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