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Hydraulics

100

An atmospheric vacuum breaker must be installed _______ higher than the final outlet.
What is 6 inches?

100

The most effective "method" for preventing backflow.
What is an air gap?

100

A double check valve assembly should be tested every _________.
What is 12 months?

100

True of false. A cross connection is a link between a potable water system and a non-potable system or a system of questionable quality.
What is true?

100

A column of water exerts pressure at the bottom of a column due to ________________.
What is the weight of the water?

200

If an air gap is installed at the end of a 2.5 inch pipe, it would be at least ______.
What is 5 inches?

200

The type of backflow preventer that should not have control valves downstream of the unit.
What is an atmospheric vacuum breaker?

200

If the gauge reads 0.7 psid while testing the #1 check valve of a double check valve assembly, the tester can determine that ______________.
What is the #1 check valve is defective?

200

The correct term for anyone who sells drinking water to the public, and who is usually the owner of a public water system.
What is a water purveyor?

200

A problem that will cause the relief valve of a reduced pressure assembly to discharge intermittently.
What is large pressure fluctuations?

300

A pressure vacuum breaker prevents ______
What is backsiphonage?

300

A device consisting of two spring-loaded resilient seat check valves in series, with a relief zone between them that functions to maintain a lower pressure in the zone than in the supply side of the unit.
What is a reduced pressure backflow prevention (RPBP)assembly?

300

To test the #2 check valve of the reduced pressure assembly for tightness against backpressure, which test kit control valves must be in the open position?
What is the High and Bypass?

300

The mechanism for establishing authority to implement a cross-connection control program.
What is an ordinance or policy?

300

Backpressure and __________ are two conditions that cause backflow.
What is backsiphonage?

400

The primary consideration when deciding whether to install a reduced pressure or a double check valve assembly.
What is the degree of hazard?

400

A visible sign of a malfunctioning RPBP.
What is a continuous discharge from the relief valve?

400

When setting up the reduced pressure assembly for testing, the tester closes shut-off valve #2, observes the gauge drop to the low end of the scale, and water discharges from the relief valve. The tester would then _______________________.
What is stop the test and fail the assembly?

400

The entity with primary responsibilty to prevent water from unapproved sources from entering the public water supply.
What is the water purveyor?

400

A backsiphonage condition caused by undersized piping carrying water under high velocity.
What is the aspirator effect?

500

A leaking #2 check valve of a reduced pressure assembly experiencing backpressure may cause _______________.
What is relief valve discharge?

500

The most likely reason for reading a static pressure drop of 0.0 psi across the #1 check valve when testing a double check valve assembly.
What is a fouled check valve?

500

While testing a reduced pressure assembly, if the high side hose is connected to test cock #3 and the low side hose is connected to test cock #2, the needle on the test kit gauge will indicate _____________.
What is no differential?

500

The consequences that can be imposed on a backflow tester for improper testing.
What is revoking certification?

500

The height of a column of water needed to exert a pressure of 4 psi at the base of the water column.
What is 9.24 feet?