Which of the following is a common cause for leakages in tubing?

Improper fittings can often lead to leakages in tubing because the connection points are critical for maintaining an airtight seal. If fittings are not the correct type for the tubing, not properly tightened, or mismatched in size, they can create gaps or spaces that allow fluids to escape. This can happen due to a range of factors, including the wrong choice of fitting material for the fluid being transported or inadequate installation techniques that fail to secure the fitting properly.

While excessive lubrication, punctures from sharp objects, and normal wear can contribute to leakages, they are less frequent as primary causes compared to issues stemming from improper fittings. Excessive lubrication might actually assist in creating seals in some cases, whereas punctures typically relate to external damage rather than installation mistakes. Similarly, wear from normal operation can result from the natural aging process of materials over time, but it usually does not emerge as an immediate issue compared to the impact of fitting-related problems. Ensuring that fittings are compatible and correctly installed is fundamental in preventing leaks in fluid systems.