BACKFLOW PREVENTION ACTUAL FINAL EXAMS ALL QUESTIONS AND ANSWERS SURE A.pdf

BACKFLOW PREVENTION ACTUAL FINAL EXAMS
ALL QUESTIONS AND ANSWERS SURE A+
✔✔When a piping discharge is near a wall, the air-gap separation must be increased an
additional ____ pipe diameter(s).
A. 1
B. 2
C. 3
D. 4
E. 5 - ✔✔1

✔✔An air-gap separation's hazard classification is _____?
A. High hazard/backsiphonage
B. High hazard/backpressure
C. Low hazard/backsiphonage
D. Low hazard/backpressure
E. High or low hazard/backsiphonage only - ✔✔High or low hazard/backsiphonage only

✔✔With the exception of a drinking fountain, the minimum air-gap separation is _____?
A. 0.5 in. (1.3 cm)
B. 1.0 in. (2.5 cm)
C. 1.5 in. (3.8 cm)
D. 2.0 in. (5.1 cm)

, E. 3.0 in. (7.6 cm) - ✔✔1.0 in. (2.5 cm)

✔✔Water discharged through an air gap to an open tank surface has a pressure of
____?
A. 0 psi absolute
B. 0 psi atmospheric
C. 0 psi gauge
D. Static line pressure
E. Vapor pressure - ✔✔0 psi atmospheric

✔✔Air-gap separations must be ____?
A. Classified
B. Inspected annually
C. Laboratory listed
D. Tested and repaired
E. Tested with a sight tube - ✔✔Inspected annually

✔✔When close to two intersecting walls, an air-gap separation is increased from 2
diameters to _____ diameters.
A. 2.5
B. 3
C. 3.5
D. 4
E. 4.5 - ✔✔4

✔✔An air-gap separation is mandatory between the potable supply and a(n) _____?
A. Bakery dough mixer
B. Isolation assembly
C. Pressure washer
D. Sanitary sewer
E. Water meter - ✔✔Sanitary sewer

✔✔Toxins may enter a water supply pipe air-gap separation through the ____?
A. Atmosphere
B. Control valve
C. Pressure tank
D. Receiving vessel
E. Sanitary sewer - ✔✔Atmosphere

✔✔A properly installed barometric loop will prevent _____?
A. Backpressure
B. Backsiphonage
C. Freezing
D. Leakage