CIT - Certified Irrigation Technician Backflow Prevention Devices 2

Question 1

A technician discovers that an RPZ assembly's relief valve is continuously discharging water. What is the most likely cause of this condition?

Accepted Answer

The first check valve is fouled or not seating properly

Answer

The supply pressure is too high

Answer

The downstream shutoff valve is closed

Answer

The test cocks are open

Question 2

According to most plumbing codes, how often must a testable backflow prevention assembly be tested after installation?

Accepted Answer

Annually

Answer

Every 6 months

Answer

Every 2 years

Answer

Only when there is a suspected failure

Question 3

Which backflow prevention device relies on an air gap between the outlet and the flood rim of a receiving vessel?

Accepted Answer

Air Gap Separation

Answer

Reduced Pressure Zone Assembly

Answer

Atmospheric Vacuum Breaker

Answer

Double Check Valve Assembly

Question 4

A Pressure Vacuum Breaker (PVB) must be installed at what minimum height above the highest downstream outlet?

Accepted Answer

12 inches

Answer

6 inches

Answer

18 inches

Answer

24 inches

Question 5

During a backflow assembly test, the technician finds that the second check valve on a Double Check Valve Assembly (DCVA) has zero differential. What action should be taken?

Accepted Answer

Clean and repair or replace the second check valve components

Answer

The assembly passes the test since the first check holds

Answer

Replace the entire assembly immediately

Answer

Increase the supply pressure to compensate

Question 6

Which type of backflow condition occurs when a water main breaks or a fire hydrant is opened, creating a negative pressure in the supply line?

Accepted Answer

Backsiphonage

Answer

Backpressure

Answer

Water hammer

Answer

Pressure surge