Chapter 5
at the point where a 1/2" lavatory fixture branch joins a 3/4" urinal fixture branch pipe, the demand increases to 14 cwsfu and the pipe increases to ____" size
1
three fixtures that require a hot water supply - kitchen sink, lavatory, and bathtub - are properly served by ____" fixture branch and fixture supply pipes
1/2"
flow pressure ranges from 8 psi for faucets and tank-type water closets to ___ psi for certain models of flushometer valves
25
flow pressure ranges from 8 psi for faucets and tank-type water closets to ____ psi for certain models of flushometer valves
25
in a cold water main, a sillcock must be supplied by a _____" branch pipe
3/4
common street water main pressure is ______
45 psi - 60 psi
water pressure within a building must never be allowed to exceed _____ psi
80
Pressure loss due to head is subtracted from the ___ to determine whether there is adequate pressure to raise the water to the required height
available pressure
pressure loss due to head is subtracted from the ___ to determine whether there is adequate pressure to raise the water to the required height
available pressure
a 3/4" ___ is installed before the branch pipe passes through the dwelling wall so that water flow can be shut off if the sillcock must be repaired or replaced
ball valve
a 3/4" ____ is installed before the branch pipe passes through the dwelling wall so that water flow can be shut off if the sillcock must be repaired or replaced
ball valve
a ____ loses 0.434 psi of pressure for every 1' of elevation of head
column of water (head)
cold water pipe is sized beginning with the fixtures nearest to the water meter
false
fixtures installed in private or private-use dwellings are used more frequently as public or public-use fixtures
false
the total demand on a water supply system if all fixtures are used simultaneously is determined by subtracting the maximum flow rates for all the plumbing fixtures within a building
false
water pressure in a water supply system is increased due to the height to which the water must flow
false
water supply sizing in the unisex restroom begins at the most remote water supply outlet, which is the water supply fixture unit
false
a water supply ____ is a measure of the estimated water demand of a plumbing fixture
fixture unit
the ___ method is a common method of properly sizing water supply piping for buildings that require a 2" or smaller water service and in which the distribution piping does not exceed 2-1/2" size
fixture unit sizing
____ is the water pressure in the water supply pipe near an outlet, such as a faucet, and is measured while the outlet is wide open and flowing
flow
____ is the volume of water used by a fixture in a given amount of time, and is measured in gallons per minute (gpm)
flow rate
_____ is (are) used to convey water to fixtures
galvanized pipe copper tube PVC, CPVC, and PEX plastic pipe
flow pressure is determined by subtracting the pressure loss due to friction and pressure loss due to ___ from the available pressure
head
each unit of a common multifamily dwelling might contain a kitchen sink and a ____
lavatory water closet with flush tank bathtub
the _____ is the only factor that can be affected by a plumber when installing a plumbing system
length of piping
plumbing systems for large projects are typically designed by ____
mechanical engineers
plumbing systems for residential structures are generally designed by ___
plumbers
plumbing systems for residential structures are generally designed by ____
plumbers
____ due to friction is the pressure variation resulting from friction within the pipe between the street water main and the water supply outlet where the water is being used
pressure loss
a ____ valve is an automatic device use to convert high an/or fluctuating inlet pressure to a lower and constant outlet pressure
pressure reducing
the water service for most ____ dwellings is 3/4" size
single-family
a main is the principal pipe artery for a water supply, and fixture branches extend from the main to fixture supply pipes
true
at the point where a water heater fixture supply pipe joins a cold water main, the demand on the main increases to 329 cwsfu, yet it is not necessary to increase the cold water main size above the 2" size originally selected, even though a larger size is indicated
true
in a one-story, one-family dwelling a kitchen sink, waster closet, lavatory, and bathtub are installed on the first floor
true
insufficient flow pressure results in inadequate amounts of water flowing through the pipe and being delivered to the fixture
true
pressure loss due to friction increases as more pipe, fittings, valves, and other devices are installed in the water supply system
true
public buildings place a large demand on the water supply and must be sized properly to ensure adequate water pressure for fixtures at remote locations
true
since water closets in a public building are fitted with flushometer valves, the cwsfu demand for the entire building is determined by adding the wsfu demand of the individual fixtures and assigning the appropriate valves to the flushometer valves
true
the five factors that determine the size of water supply piping are: available water pressure, fixture demand, length of piping, height of building, and flow pressure needed at top floor
true
water supply piping sizing for larger installation is based on the available water pressure, fixture demand, type and length of piping, height of the building, and flow pressure needed at the top floor
true
when street water main pressure fluctuates widely throughout the day, the water supply system of the building must be designed on the basis of the maximum pressure available
true
the ___ system must be sized properly so that the pipes can convey an adequate supply of water to the plumbing fixtures and appliances to allow them to function properly
water supply
the fixture supply pipe for ___ rest room lavatories rated at 2 cwsfu each is 1/2" size
women's
