The local health department sends a local health inspector to inspect restaurants. The health inspector will give the restaurant a grade based on the inspection.
Very often, they don't want the restraunt to give people bad food.
They are inspected at least once a year. Inspections are random - and without warning.
About maybe twice a year
before and after
about twice a year
Daily
Very. Dept of weights & measures controls cheating & those that have edibles inspected by Health Dept.
before use
For fish tanks, weekly, at a minimum.
Every six months.
Every day
Frequency of track inspections depends on the individual tracks. Mainline freight tracks are inspected once a week, Tracks used for passenger service are inspected twice a week. Yard tracks are inspected monthly. All per FRA regulations.
In the US, restaurants traditionally give water free of charge to patrons or guests.