which type of break is most common in commercial vehicles
Disc brake Hydraulically actuated disc brakes are the most commonly used form of brake for motor vehicles, but the principles of a disc brake are applicable to almost any rotating shaft.
Break (work) A coffee break in the United States and elsewhere is a short mid-morning rest period granted to employees in business and industry, corresponding with the Commonwealth terms "elevenses", "smoko" (in Australia), "morning tea", "tea break", or even just "tea". An afternoon coffee break, or afternoon tea, often occurs as well.