3rd Class Power Engineering (3B1) Practice Exam

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What is one method for tube attachment?

Screwing the tubes together

Expanding the ends into holes

Expanding the ends of the tubes into holes is a common method of attachment that creates a strong and secure joint. This technique involves enlarging the ends of the tubes so that they fit snugly into corresponding holes or sockets in another component, often a tube sheet or header. When the ends are expanded, they form a mechanical bond that can withstand significant pressure and thermal stresses, which is crucial in applications such as heat exchangers or boilers.

This method ensures a tight fit that minimizes leakage and maintains structural integrity under various operating conditions. It is particularly advantageous in high-pressure environments, as it can accommodate thermal expansion and contraction without compromising the joint's strength. The mechanical interlocking created through expansion is often preferred in industrial applications due to its reliability and robustness.

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Using adhesive seals

Threading the ends

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