Backflow Exam 1

Containing a plumbing system from a public water supply requires backflow protection at the _____________.

• appliance or fixture

• building foundation

• irrigation system

• service connection

• sprinkler riser

Backflow preventer manufacturers recommend that assemblies be field-tested annually and when _______________.

• installed

• moved

• repaired or installed

• shut down

A differential pressure gauge reading of 0.2 psid is represented on a water column sight tube by ________________ inches of water>

• 1/16"

• 1/2"

• 3.5"

• 5.5"

Backsiphonage may occur when the pressure inside copper tubing is ________________.

• greater than atmospheric pressure

• greater than barometric pressure

• less than atmospheric pressure

• greater than 0 gauge pressure

A cross-connection may be a permanent piping arrangement or a(n) ________________.

• backflow preventer

• temporary hose bibb connection

• OSHA hazardous area designation

• railroad and highway intersection sign

The isolation of a plumbing water system hazard requires ___.

• appliance protection

• building quarantine

• high-hazard protection

• toxin monitoring

A direct cross-connection suggests the piping system may be subjected to ___.

• backpressure or backsiphonage

• backsiphonage only

• sustained pressure

• periodic inspection

A pipe restriction’s flow velocity increase may allow ___.

• aspiration

• backpressure

• low turbulence

• pressure surges

Water supply contamination from backflow may result in ___.

• a bad taste

• coloration

• death

• pipe wall mineral deposit flaking

To prevent backflow, an atmospheric vacuum breaker is primarily designed to ___.

• allow air into the outlet piping system

• create an elevation loop above ground

• introduce head loss

• restrict velocity