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60 Cards in this Set
- Front
- Back
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what is velocity? |
the rate at which fluid flows |
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what is pressure? |
the force that is exerted on the walls of the pipe |
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what is the minimum working pressure for a fixture? |
manufactures specifications |
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what is the maximum working pressure at a fixture? |
550 kpa |
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what is the minimum water supply line for a W.C. |
1" |
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what is the term used for piping inside the building? |
water distribution |
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what is the minimum size of a water meter? |
5/8" |
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what does a water meter do? |
measures the volume of water passing through |
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what is the most common type of meter? |
positive displacement |
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what is a turbine meter? |
used as a monitering device for large volumes of water |
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how far must a water meter be from any entrance or wall? |
12" |
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what is the space required between adaptors on a 5/8 water meter? |
12" |
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how many valves are required on a bypass? |
3 |
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what type of valves are required on a bypass? |
port gate valves or ball valves |
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what is installed on domestic waterlines to prevent condensation? |
insulation |
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a water distribution system must be capable of meeting what kind of demands? |
peak |
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what can be installed if a hot water line is longer than 30m ? |
-recirculating line -self regulating heat trace |
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what is the temperature of water at a drinking fountain? |
10° C |
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what is the recommended length of flush for a urinal? |
3-5 seconds |
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why is there two valves on a HWT cold supply? |
- to isolate the hot water supply to repair faucets and replace washers - to turn off the water to the tank should it be necessary to drain |
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why must the cold water enter at the bottom of the tank? |
to ensure it doesn't mix with hot water at the top of the tank |
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what is the purpose of the sacrificial anode? |
reduces corrosion due to electrolysis |
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why is a temperature and pressure relief valve installed on a tank? |
-to prevent steam flash -to make sure tank doesn't explode |
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on what supply ( hot/cold ) must a shut off be installed? |
cold |
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where must a t&p valve be located on top of a tank? |
6" |
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what size should the discharge pipe from a T&P valve be? |
same size as the inlet |
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where should the outlet on a T&P valve terminate? |
no more than 12" above the floor |
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what does thermal lag mean? |
undesirable wait for hot water |
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how are T&P valves sized? |
burner input rating |
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what component controls the frequency of flush for a urinal flush tank? |
fill valve |
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what is the maximum allowable temperature to be delivered froma mixing valve? |
120° F but recommended 100° F |
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how must sterilizers be connected to a drainage system? |
indirectly connected |
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temperature sensing valves will be a maximum temperature of what? |
120°F |
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what is the flood level rim height of a kitchen sink? |
36" |
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what is the maximum length for a 3/8 supply line? |
750mm |
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when must a bypass be installed? |
1-1\2" or more |
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red brass or bronze, what can be used underground? |
red brass |
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what is the maximum temperature setting on a hot water tank? |
140°F |
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when must a stop and drain valve be installed on a water service? |
1" or more |
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what is the minimum trap size for a bidet? |
1-1/4" |
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do bidets have integral traps? |
no |
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how are bidets mounted? |
floor mounted |
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when must a recirc line be installed? |
if the water distribution length is more than 30m or supplying water through more than 4 stories |
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what is the only fixture that must have a shutoff? |
a waterlosest |
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what is the size of the drain pan (floor drain) that your relief valve drains into? |
two sizes larger than relief valve |
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what is the spacing in between urinals? |
6" |
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what is the clearence required under the front edge of a barrier-free lavatory? |
735 mm |
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what is the turning radius for a barrier-free cubical? |
1.5m or 5 ft |
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how far off the floor must a barrier free water closet be? |
400-460 mm |
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how long of a hose must a barrier free shower be? |
1500mm or 59" |
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what is the minimum automatic control effort for a drinking fountain in a barrier free setting? |
no more than 22N or 5lb of fource |
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when urinals are installed in multiples, what is another name for them? |
batteries |
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what is the minimum size of bathroom stall? |
32" wide 55" long |
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what is the minimum height for a lavatory to its flood level rim? |
31" |
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what coloum do you use when sizing water distribution? |
the distance to the most remote fixture |
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what coloum do you use when sizing your water service line? |
distance from the property line to the main building shut off |
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what do you subtract to find the total kPa flowing through the water distribution line? |
the height & loss through meter |
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what do you subtract to find the total kPa flowing through the water service? |
the elevation change from the static pressure at the property line |
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what is the rough in height for a drinking fountain? |
30" for elementary 40-44" for high school and offices |
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larger HWT are installed how far above the floor? |
4ft to 6ft |
