The dimples of a combustor dome band that has a low operating time will usually have what kind of damage?

Correct Answer: Option C — Cracks.

Combustor dome bands are subject to intense thermal cycling. In low-operating-time components, the material has not yet experienced significant erosion or melting, but the rapid expansion and contraction cycles induce thermal fatigue, which manifests as stress-induced cracks in the dimpled areas of the dome band structure.