1. Ukuqina okuphezulu, akukho ukuguqulwa ----- Ukuqina kwensimbi engagqwali kungaphezu kokuphindwe izikhathi ezingu-2 kunethusi, izikhathi ezingaphezu kwezingu-10 ngaphezu kwe-aluminium, ukucubungula kunzima, futhi inqubo yokukhiqiza iyinkimbinkimbi.
2.Ihlala isikhathi eside futhi engagqwali---yenziwe ngensimbi engagqwali, inhlanganisela ye-chrome ne-nickel idala ungqimba lwe-anti-oxidation ebusweni bento, edlala indima yokugqwala.
3.Inobungani bemvelo, ayinabo ubuthi futhi ayingcolisi ------- Insimbi engagqwali ibonwe njengehlanzekile, iphephile, ayinabo ubuthi futhi imelana nama-asidi nama-alkali. Ayidedelwa olwandle futhi ayingcolisi amanzi ompompi.
4. Izinto ezinhle, ezisezingeni eliphezulu, ezisebenzayo -------- Imikhiqizo yensimbi engagqwali idumile emhlabeni wonke. Ingaphezulu liyisiliva nokumhlophe. Ngemuva kweminyaka eyishumi yokusetshenziswa, ayisoze yagqwala. Uma nje uyisula ngamanzi ahlanzekile, izohlanzeka futhi ibe yinhle, ikhanye njengentsha.