BACKFLOW PREVENTION EXAM UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

BACKFLOW PREVENTION EXAM UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. Backflow preventer manufacturers recommend that assemblies be field-tested annually and when_____?
A. Installed
B. Moved
C. Repaired or Installed
D. Shut down
E. Water suppliers provide notice
Answer:
C. Repaired or Installed

Question:
2. A differential pressure gauge reading of 0.2 psid is represented on water column sight tube by _____?
A. 1/16 in. (0.16 cm)
B. 1/2 in. (1.3 cm)
C. 2 in. (5.1 cm)
D. 3.5 in. (8.9 cm)
E. 5.5 in. (14 cm)
Answer:
E. 5.5 in. (14 cm)

Question:
3. Pollution of a public water supply suggests the substance in the water is ____?
A. Aesthetically bad
B. Biological with virus only
C. Lowering the pH below 1.4
D. Radiological
E. Toxic
Answer:
A. Aesthetically bad

Question:
4. Backsiphonage may occur when the pressure inside copper tubing is ____?
A. Greater than atmospheric pressure
B. Greater than barometric pressure
C. Greater than 0 gauge pressure
D. Less than absolute pressure
E. Less than atmospheric pressure
Answer:
E. Less than atmospheric pressure

,Question:
5. A cross-connection may be a permanent piping arrangement or a(n) ____?
A. Backflow preventer
B. Church symbol
C. OSHA hazardous area designation
D. Railroad and highway intersection sign
E. Temporary hose bibb connection
Answer:
E. Temporary hose bibb connection

Question:
6. The isolation of a plumbing water system hazard requires____?
A. Appliance protection
B. Building quarantine
C. High-hazard protection
D. Meter protection
E. Toxin monitoring
Answer:
A. Appliance protection

Question:
7. A direct cross-connection suggests the piping system may be subjected to ____?
A. Backpressure or backsiphonage
B. Backsiphonage only
C. Periodic inspection
D. Sustained pressure
E. Toxic materials
Answer:
A. Backpressure or backsiphonage

Question:
8. A pipe restriction's flow velocity increase may allow ____?
A. Aspiration
B. Backpressure
C. Low turbulence
D. Pressure head
E. Pressure surges
Answer:
A. Aspiration

Question:
9. Water supply contamination from backflow may result in ____?
A. A bad taste
B. Coloration
C. Death
D. Odor or smell
E. Pipe wall mineral deposit flaking

, Answer:
C. Death

Question:
10. To prevent backflow, an atmospheric vacuum breaker is primarily designed to ____?
A. Allow air into the outlet piping system
B. Create an elevation loop above ground
C. Introduce head loss
D. Prevent backpressure
E. Restrict velocity
Answer:
A. Allow air into the outlet piping system

Question:
11. Atmospheric vacuum breakers will typically be located on ____?
A. Commercial irrigation systems
B. Fire-suppression systems
C. Plumbing fixtures or appliances
D. Utility storage tanks
E. Water service connections
Answer:
C. Plumbing fixtures or appliances

Question:
12. The mechanical component of an atmospheric vacuum breaker serves as an air-inlet valve and a ____?
A. Check valve
B. Regulating valve
C. Relief valve
D. Shut-off valve
E. Test port
Answer:
A. Check valve

Question:
13. A deck-mounted atmospheric vacuum breaker's critical installation level is above the outlet usage by
___?
A. 1 in. (2.5 cm)
B. 3 in. (7.6 cm)
C. 6 in. (15 cm)
D. 12 in. (30 cm)
E. 18 in. (46 cm)
Answer:
A. 1 in. (2.5 cm)