BAT BAT Cross-Connection Control & Risk Assessment

Question 1

What is a cross-connection in a potable water system?

Accepted Answer

Any actual or potential link between the potable water supply and a source of contamination

Answer

A T-fitting joining two supply mains

Answer

A valve connecting two different pressure zones

Answer

A bypass line around a backflow prevention assembly

Question 2

Which type of backflow is caused primarily by a loss of pressure in the supply system?

Accepted Answer

Backsiphonage

Answer

Back pressure backflow

Answer

Thermal expansion backflow

Answer

Induced backflow

Question 3

What is the highest level of cross-connection hazard classification?

Accepted Answer

High hazard (health hazard)

Answer

Low hazard (nuisance)

Answer

Moderate hazard

Answer

Critical hazard (biohazard)

Question 4

Which backflow prevention assembly provides the highest level of protection and is required for high-hazard cross-connections?

Accepted Answer

Reduced pressure zone assembly (RPZ)

Answer

Double check valve assembly (DCVA)

Answer

Pressure vacuum breaker (PVB)

Answer

Atmospheric vacuum breaker (AVB)

Question 5

What is backsiphonage?

Accepted Answer

Reverse flow caused by negative pressure or vacuum in the supply line

Answer

Reverse flow caused by downstream pressure exceeding supply pressure

Answer

Forward flow blocked by a closed check valve

Answer

Contamination entering through a faulty air gap

Question 6

What primarily determines the degree of backflow protection required at a cross-connection?

Accepted Answer

The nature and degree of hazard posed by the connected substance

Answer

The pipe diameter at the connection point

Answer

The age of the plumbing system

Answer

The distance from the water meter to the connection