Question

What is a cross-connection?

A
A physical connection between safe and unsafe water sources
B
Back-flow of clean into dirty water
С
none of these are correct
D
A connection between water and electrical sources

Answer 1

A cross-connection is a point in plumbing where it is possible for a non potable (not drinkable/safe to drink) to come in contact with a potable (safe to drink) water supply. so I think the answer would be A