Which factor is NOT a consideration when checking hoses and lines?

The focus of this question is on identifying factors that are relevant when inspecting hoses and lines for maintenance purposes. While kinking at flex points may certainly affect the performance and functionality of hoses and lines, it is not considered a primary factor that should be checked compared to the other options provided.

When maintaining hoses and lines, examining the tightness of fittings is crucial, as loose fittings can lead to leaks or failures that compromise the system's integrity. Cleanliness is also an important aspect, as contaminants can lead to blockage and degradation of materials. The thickness and color of hoses and lines are significant indicators of their condition, as they can reveal wear, age, or whether the hose is suitable for the specific application.

Although kinking can have an impact on the performance of hoses, it is not a fundamental consideration in the same way that the other factors are when performing a standard inspection. The presence of kinks is often an effect or symptom of other issues rather than a direct measurement of the hoses’ integrity or reliability, making it a lesser priority during routine checks.