Backflow Prevention Practice Exam Questions and Answers 2024 Graded A.

Backflow Prevention Practice Exam Questions and Answers 2024 Graded A. A backflow preventer creates a closed plumbing system that requires the installation of a(n) _____? A. Expansion tank B. Globe valve C. Pressure reducing valve D. Temperature and pressure relief valve E. Utility box key - ANSWER Expansion tank A barometric loop must be installed 35 ft (10.7 m) above the highest ____? A. Boiler B. Fixture outlet C. Gate valve D. Service connection E. Water meter - ANSWER Fixture outlet A check valve field test reported value of 0.8 psid (5.5 kPa) suggests _____? A. A passing check valve B. A broken or failed spring C. Debris in the check seat D. Disc softening or decay E. Low water pressure - ANSWER Disc softening or decay A common backflow preventer on a double-wall heat exchanger with leak detection is ____? A. An air-gap separation B. An atmospheric vacuum breaker C. A double check valve assembly D. A reduced pressure principle assembly E. Nothing - ANSWER Nothing 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 Temporary hose bibb connection 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 1 in. (2.5 cm) 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 5.5 in. (14 cm) 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 Backpressure or backsiphonage.