PLUMBING LEVEL 3
Increasing the temperature of water will - Answer- decrease its density but increase its volume
At a temperature of 100F, 1 cubic foot of water weighs - Answer- 61.99 pounds
Transient flow describes a situation in which water flow is - Answer- erratic and unstable
Water that flows smoothly in a straight line is exhibiting - Answer- laminar flow
Quiet operation of a water supply systems in in part ensured by - Answer- a reasonable flow rate
An efficient water supply system should provide, under peak demand conditions, adequate
pressure to the - Answer- farthest point of use
Fixtures or outlets considered intermittent-demand items are typically in use for a period of no
more than - Answer- five minutes
Water flow rates calculated for the total supply system are expressed in gallons per - Answer-
minute
Decreased pressure in a water supply system resulting from the water passing through fittings,
meters, and other devices is referred to as - Answer- pressure drop
The difference in elevation between the supply line and the system's highest fixture is called -
Answer- static head loss
Backflow of wastewater into the potable-water supply can cause - Answer- contamination
A cross-connection becomes dangerous when there is a - Answer- backflow
The simplest form of backflow preventer is the - Answer- air gap
When there is a low-hazard risk of back siphonage in hoses attached to a photograph-developing
sink or a dairy barn, some codes require the installation of a - Answer- hose-connection vacuum
breaker
The water line supplying a swimming pool requires the installation of a(n) - Answer- pressure-type
vacuum breaker
Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or
replace because they - Answer- are not normally fitted with shutoff valves or test cocks
Double-check valve assemblies provide heavy-duty protection in applications that are - Answer-
continuous pressure, low-hazard
Plumbing codes require the installation of reduced-pressure zone principle backflow preventer
assemblies in - Answer- car washes
Increasing the temperature of water will - Answer- decrease its density but increase its volume
At a temperature of 100F, 1 cubic foot of water weighs - Answer- 61.99 pounds
Transient flow describes a situation in which water flow is - Answer- erratic and unstable
Water that flows smoothly in a straight line is exhibiting - Answer- laminar flow
Quiet operation of a water supply systems in in part ensured by - Answer- a reasonable flow rate
An efficient water supply system should provide, under peak demand conditions, adequate
pressure to the - Answer- farthest point of use
Fixtures or outlets considered intermittent-demand items are typically in use for a period of no
more than - Answer- five minutes
Water flow rates calculated for the total supply system are expressed in gallons per - Answer-
minute
Decreased pressure in a water supply system resulting from the water passing through fittings,
meters, and other devices is referred to as - Answer- pressure drop
The difference in elevation between the supply line and the system's highest fixture is called -
Answer- static head loss
Backflow of wastewater into the potable-water supply can cause - Answer- contamination
A cross-connection becomes dangerous when there is a - Answer- backflow
The simplest form of backflow preventer is the - Answer- air gap
When there is a low-hazard risk of back siphonage in hoses attached to a photograph-developing
sink or a dairy barn, some codes require the installation of a - Answer- hose-connection vacuum
breaker
The water line supplying a swimming pool requires the installation of a(n) - Answer- pressure-type
vacuum breaker
Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or
replace because they - Answer- are not normally fitted with shutoff valves or test cocks
Double-check valve assemblies provide heavy-duty protection in applications that are - Answer-
continuous pressure, low-hazard
Plumbing codes require the installation of reduced-pressure zone principle backflow preventer
assemblies in - Answer- car washes
