How much greater can friction loss be in older hose compared to modern hose?

Answer: C — 50 percent

Friction loss in hoses primarily depends on their internal diameter, smoothness of the interior surface, and length, as well as the flow rate through the hose. Over time, older hoses can suffer from wear and degradation, resulting in a rougher interior surface and potential narrowing of the inside diameter due to accumulated deposits and physical wear. Comparatively, modern hoses are designed with improvements in material technology and manufacturing processes that promote better flow characteristics and decreased friction loss. The statement that friction loss in older hoses can be as much as 50 percent greater than in modern hoses reflects the significant impact that these factors have on performance. This increase can greatly affect the efficiency and power needed to deliver water to the scene, emphasizing the importance of regularly testing and replacing older hoses to maintain optimal firefighting capabilities.