IA Backflow Prevention & Cross-Connection Control

Question 1

What is backflow in an irrigation system?

Accepted Answer

The reverse flow of water from a non-potable source into the potable water supply

Answer

Backflow is the unwanted reversal of water flow that can allow contaminants from a non-potable source to enter the clean potable water supply.

Question 2

Which two pressure conditions can cause backflow to occur?

Accepted Answer

Back-siphonage and back-pressure

Answer

Backflow is caused by back-siphonage (negative/reduced supply pressure creating a siphon) or back-pressure (downstream pressure exceeding supply pressure).

Question 3

Which of the following represents a high-hazard cross-connection in an irrigation system?

Accepted Answer

A potable water supply connected to a system with fertilizer injection or recycled water

Answer

Connecting potable water to systems with chemical injectors or recycled water creates a high-hazard cross-connection due to the serious health risk of contamination.

Question 4

What is the definition of a cross-connection?

Accepted Answer

Any physical connection between a potable water supply and a non-potable source

Answer

A cross-connection is any physical link between a potable water system and any source that could introduce contaminants into the drinking water supply.

Question 5

Back-siphonage in an irrigation system is most likely to occur when:

Accepted Answer

A sudden high demand or break in the supply main creates negative pressure

Answer

Back-siphonage occurs when negative pressure in the supply line draws water backward, commonly caused by high upstream demand, a main break, or firefighting activities.

IA - Irrigation Association Certification Practice Test

IA - Irrigation Association Certification Practice Test

IA Backflow Prevention & Cross-Connection Control