Questions › Category: Civil Engineering › According to ISI, bitumen is classified into 0 Vote Up Vote Down VideRime Staff asked 5 years ago According to ISI, bitumen is classified intoa) 2 gradesb) 4 gradesc) 8 gradesd) 10 gradesBuilding Materials MCQs Set-12Share this Now with Friends: Share on WhatsApp (Opens in new window) WhatsApp Share on Telegram (Opens in new window) Telegram MoreRelated