FREE AND STUDY GAMES ABOUT BACKFLOW

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FREE AND STUDY GAMES ABOUT BACKFLOW

PREVENTION EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -37 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Cross Connection Control

Answer:

*Containment *Isolation

Question 2: Disadvantages to Air Gaps

Answer:

*Splash *Downstream Water Pressure

Question 3: Air Gap

Answer:

complete physical separation between a free-flowing discharge of potable water and an open receiving vessel.

Question 4: Qualities of an Air Gap

Answer:

*Prevents against backpressure and back siphonage *Approved against all types of cross connection w/possibility of back pressure or back siphonage

Question 5: Back Siphonage

Answer:

*negative or reduced pressure in supply line *caused by a break in a water main, opening a fire hydrant or demands on a system higher than the design allows *creates potential for siphons to reverse water flow

Question 6: Types of Cross Connection

Answer:

*Direct Cross Connection *Indirect Cross Conneciton

Question 7: Air Gap Testing

Answer:

Make sure the air gap has appropriate clearance

Question 8: Categories of hazard

Answer:

*Pollutant *Contaminant

Question 9: Types of Containment

Answer:

*High Hazard *High Health Hazard *Toxic *Contamination Hazard

Question 10: Back Pressure

Answer:

*pressure higher than the supply pressure *caused by a pump, elevated tank, boiler, air/steam pressure, etc

Question 11: Qualities of Atmospheric Vacuum Breaker

Answer:

*Water flow causes air inlet valve to close air inlet port *When water flow stops, the air inlet valve falls and protects against back siphonage *Prevent against Back Siphonage, Indirect Cross Connection only and toxic/non-toxic hazard

Question 12: Examples of Air Gap

Answer:

*Lavatory *Sink *Bathtub

Question 13: Backflow

Answer:

undesirable reversal of flow in a potable water system

Question 14: When is water considered Used?

Answer:

Once it passes through the water meter and considered sold. The water quality can no longer be guaranteed

Question 15: Flood Level Rim

Answer:

the height at which water will flow out of the receiving vessel if the drain and/or overflow is not functioning

Question 16: Qualities of Spill Resistant Vacuum Breaker

Answer:

*Water flows, valve opens, air inlet closes

• Water stops, valve closes, air inlet opens

*Must contain resiliently sealed test cocks & shut off valves at each end *Prevents against Back Siphonage, Indirect cross connection & toxic/non-toxic hazards

Question 17: Spill Resistant Vacuum Breaker Installation Requirements

Answer:

*Minimum 12-inch clearance above the highest head, pipe, fittings, fixtures, valves, etc.*Valves can be installed on the downstream side and may be under constant pressure

Question 18: Qualities of Pressure Vacuum Breaker

Answer:

*check valve opens when water flows *air inlet valve opens when water stops *must contain resiliently sealed test cocks & shutoff valves at each end *Prevent against Back Siphonage only, Indirect cross connection only & toxic/non-toxic hazards

Question 19: Direct Cross Connection

Answer:

Supports both backpressure and back siphonage

Question 20: Atmospheric Vacuum Breaker Installation Requirements

Answer:

*Minimum of 6 inch clearance above highest head, pipe, fittings, fixtures, ect.*Can NOT be installed with valves on the downstream side

• MUST be installed AFTER any valves

*Shall not be under pressure for more than 12 hours in any 24 hour period

Question 21: Inspections for Pressure Vacuum Breaker

Answer:

Should be completed:

*On installation -AND- *As often as required by local jurisdiction

Question 22: Downstream Water Pressure

Answer:

if desired with Air Gap, following equipment may be required:

*Reservoir *Pumps *Storage Tanks *And/or Other Equipment

Question 23: Indirect Cross Connection

Answer:

Supports only back siphonage

Question 24: Pollutant

Answer:

the least of the hazards and does not create a health hazard but lowers the aesthetic quality of the water