BACKFLOW PREVENTION ASSEMBLY
CERTIFICATION EVALUATION EXAMS 2026
COMPLETE QUESTIONS AND ANSWERS
● In a perfect vacuum, water can be drawn up a column__________feet.
Answer: 33.9
● Which of the following is considered to be a chemical contaminant?
Answer: Arsenic
● Which of the following is considered to be a biological health hazard?
Answer: Giardia
● What type of assembly has two internally spring- loaded CV, two shut-
off valves, and four test cocks? Answer: Double Check
● Which of the following is the most suitable protection when directly
connecting potable water supply lines to sewerage systems or to
radioactive sources? Answer: Air Gap
● A Bypass of a Backflow prevention assembly may be permitted only if
the assembly in the bypass: Answer: Is the same type
, ● What Federal Law made water purveyors responsible for water quality
all the way to the customers tap? Answer: Safe Drinking Water Act
Amendment of 1986
● If a column of water is exerting a pressure of 50 psi, how high must
the water be inside the column? Answer: 115.5ft
● As the velocity of water increases, pressure: Answer: Decreases
● Atmospheric pressure at sea level is _____psi Answer: 14.7
● A water supply other than the purveyors approved supply that is
available to a premise is called: Answer: Auxiliary Water Supply
● When testing a DCDA the mainline and bypass assemblies should be a
tested minimum of ________ months. Answer: 12
● How can backsiphonage action be broken Answer: Air Gap
● What single difficult to regulate item is more commonly associated
with cross connections, specifically through backsiphonage? Answer:
Garden Hose
CERTIFICATION EVALUATION EXAMS 2026
COMPLETE QUESTIONS AND ANSWERS
● In a perfect vacuum, water can be drawn up a column__________feet.
Answer: 33.9
● Which of the following is considered to be a chemical contaminant?
Answer: Arsenic
● Which of the following is considered to be a biological health hazard?
Answer: Giardia
● What type of assembly has two internally spring- loaded CV, two shut-
off valves, and four test cocks? Answer: Double Check
● Which of the following is the most suitable protection when directly
connecting potable water supply lines to sewerage systems or to
radioactive sources? Answer: Air Gap
● A Bypass of a Backflow prevention assembly may be permitted only if
the assembly in the bypass: Answer: Is the same type
, ● What Federal Law made water purveyors responsible for water quality
all the way to the customers tap? Answer: Safe Drinking Water Act
Amendment of 1986
● If a column of water is exerting a pressure of 50 psi, how high must
the water be inside the column? Answer: 115.5ft
● As the velocity of water increases, pressure: Answer: Decreases
● Atmospheric pressure at sea level is _____psi Answer: 14.7
● A water supply other than the purveyors approved supply that is
available to a premise is called: Answer: Auxiliary Water Supply
● When testing a DCDA the mainline and bypass assemblies should be a
tested minimum of ________ months. Answer: 12
● How can backsiphonage action be broken Answer: Air Gap
● What single difficult to regulate item is more commonly associated
with cross connections, specifically through backsiphonage? Answer:
Garden Hose
