Backflow Prevention Practice Exam questions with
accurate answers
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 Ans✓✓✓ 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 Ans✓✓✓ 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 Ans✓✓✓ 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 Ans✓✓✓ 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 Ans✓✓✓ 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) Ans✓✓✓ 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) Ans✓✓✓ 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 Ans✓✓✓ Backpressure or backsiphonage
A double check valve assembly installed in a vertical flow down
orientation is only allowed ______?
A. In a basement or vault
B. If the assembly was tested and approved as such
C. If the check weight does not compress the spring
, D. On fire-suppression systems
E. On water supply service connections Ans✓✓✓ If the assembly was
tested and approved as such
A double check valve assembly is installed 12 in. (30.5 cm) above the
floor for _____?
A. Electrical code compliance
B. Floor draining
C. Maintenance
D. Mechanical code compliance
E. Rodent control Ans✓✓✓ Maintenance
A field test report for a double check valve assembly will include the
manufacturer's name, model, size, and _____?
A. Body material
B. Date of manufacture
C. Serial number
D. Working pressure (maximum)
E. Working temperature (maximum) Ans✓✓✓ Serial number
A fire sprinkler system's backflow protection for a black-iron pipe
system is typically ____?
A. An air-gap separation
B. A double check valve assembly
accurate answers
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 Ans✓✓✓ 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 Ans✓✓✓ 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 Ans✓✓✓ 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 Ans✓✓✓ 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 Ans✓✓✓ 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) Ans✓✓✓ 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) Ans✓✓✓ 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 Ans✓✓✓ Backpressure or backsiphonage
A double check valve assembly installed in a vertical flow down
orientation is only allowed ______?
A. In a basement or vault
B. If the assembly was tested and approved as such
C. If the check weight does not compress the spring
, D. On fire-suppression systems
E. On water supply service connections Ans✓✓✓ If the assembly was
tested and approved as such
A double check valve assembly is installed 12 in. (30.5 cm) above the
floor for _____?
A. Electrical code compliance
B. Floor draining
C. Maintenance
D. Mechanical code compliance
E. Rodent control Ans✓✓✓ Maintenance
A field test report for a double check valve assembly will include the
manufacturer's name, model, size, and _____?
A. Body material
B. Date of manufacture
C. Serial number
D. Working pressure (maximum)
E. Working temperature (maximum) Ans✓✓✓ Serial number
A fire sprinkler system's backflow protection for a black-iron pipe
system is typically ____?
A. An air-gap separation
B. A double check valve assembly
