Which of the Following Backflow Prevention Methods Is Approved for All

question 12

Multiple Choice

Which of the following backflow prevention methods is approved for all hazards?

• A) air gap
• B) atmospheric-type vacuum breaker
• C) double check valve assembly
• D) pressure-type vacuum breaker

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Definitions:

Linear

Describing a structure, progression, or relationship that follows a straight line or in simpler terms, one that proceeds from one stage to the next in a single series of steps.

Ammonia Molecule

A compound made of nitrogen and hydrogen with the formula NH3, characterized by a sharp smell and often used in fertilizers.

Trigonal Pyramidal

A molecule shape where a central atom is surrounded by three atoms at the corners of a pyramid, which has a triangular base.

Central Atom

The atom in a molecule or polyatomic ion that is surrounded by other atoms, forming the basis of the molecule's geometry.