water dist quiz Flashcards
a pH level of 4 indicated that the substance is?
acidic
water is considered to be a universal solvent because
more things dissolve in water than in any other solvent
the arterial loop dist system used by municipalities is installed for areas with:
heavy demand on the system
the tree system of water dist makes it difficult to:
supply good water to all parts of the system
changes of direction or elevation in water dist networks are protected from disconnection by:
thrust blocks and anchors
if transmission pipes are rapidly drained without admitting air to the system:
the pipe may collapse from effects of vacuum
a gooseneck on a water service is installed to provide for:
flexibility of the pipe as ground settles after backfill or moves from frost
the corporation curb cock is placed on or near the property line so:
the utility employee doesnt have to trespass on private property
drilling the corporation curb cock for a water service is:
discouraged by the AWWA
if a water service is to be placed in the same trench as the building sewer, the trench:
should be excavated with a raised portion on one side for the water service pipe
if a check valve or backflow preventer is installed to protect a water service pipe that is suitable for cold water only, the building dist system becomes a:
closed water system
the shut off valve placed at the entry point of a 3/4” or 1” water service is allowed to be:
a stop and drain valve
a water test for a water dist system may be done with:
potable water only
what is the reason for having a recirculation line on the hot water dist. line?
to supply hot water to the furthest fixtures immediately
if you were to rough in a back of WC, could you have one shut off valve to serve the bank?
no, one valve is required per WC
