https://catalog.mines.edu/undergraduate/undergraduateinformation/distributedcore/
Colorado School of Mines requires 19 credits of humanities and social studies. These include 3 specified courses (4, 3, 3 credits), 2 mid-level (2xx or 3xx course numbers) courses, and 1 4xx course number course.
ABET requires accredited programs to have a general education requirement, but does not specify too much about it. A college like Brown includes some humanities and social studies requirements for ABET-accredited majors, even though it has no general education requirements for other majors.