Engineering graduate admission officers do consider dropped classes on transcripts, but the impact varies based on several factors. The number of dropped classes, timing (before or after receiving grades), and the context—such as whether they were major courses or electives—are all important. A strong overall GPA and additional experiences like research can mitigate concerns about a few poor grades. Admissions committees often favor candidates who show improvement over time, so a strong finish can outweigh earlier struggles. It's advisable to address any academic challenges in a personal statement, but the focus should remain on strengths and achievements. Maintaining a GPA above 3.0, particularly aiming for 3.5 or higher, is generally favorable for graduate applications.