Water Distribution 060201c

Question 1

Where is the groundwater we find

Answer 1

In porous layers of rock,sand, gravel called aquifers

Question 2

Who established acceptable levels of organic and inorganic matter in drinking water

Answer 2

Health Canada in conjunction with concerned individuals from various provinces

Question 3

How often should water supplies be tested

Answer 3

Once a year

Question 4

What’s the max velocity of water in a transmission pipe

Answer 4

Max of 5ft/sec

Question 5

Maximum static pressure allowed in occupied building

Answer 5

80 psi (550 kpa)

Question 6

When the pressure in a building exceeds 80 psi or 550kpa what should be installed

Answer 6

Pressure reducing Valve PRV

Question 7

What’s used in pipes changes of direction to prevent pipes coming apart

Answer 7

Thrust blocks or thrust anchors

Question 8

Minimum size of water service for single family dwelling

Answer 8

3/4”

Question 9

Nicks or scratches deeper than what percent of wall thickness are required to be replaced

Answer 9

10%

Question 10

Where does building distribution piping begin

Answer 10

Begins at the outlet of the water meter

Question 11

A ball valve or inverted plug valve installed in the water service pipe at a customers property line

Answer 11

Curb cock ( CC)

Question 12

What stops cannot be opened or closed from ground surface as they are covered over with back fill

Answer 12

Small corporation main stop

Question 13

The threaded connection of the sadddle is located to point toward the property and with its outlet at an angle of what degree

Answer 13

30 to 45 degrees

Question 14

Outlet pipe installed with a service bend is called what for 2” or less

Answer 14

Settlement loop or gooseneck

Question 15

Some types Cold water supply pipes are only suitable for cold water what should they be protected from

Answer 15

Hot water flowing back from water heater

Question 16

Device keeps temperature of water from exceeding 99c and must be installed top 6” of the tank

Answer 16

Pressure relief valve

Question 17

Controls on-off function of the heating device and maintains water at a pre set temperature of about 60c fire domestic use

Answer 17

Thermostat

Question 18

Pressure relief valve must have the outlet directed with a drop tube of same diameter within how many inches of the floor

Answer 18

12”

Question 19

When an eco control trips

Answer 19

Control must be replaced means something in the tank is malfunctioning

Question 20

Relief valve piping practices

Answer 20

If steel no threads on open end if copper cut at a 45 degree angle

Question 21

Minimum static pressure at water service entry

Answer 21

Not less than 200 kpa 30 psi

Question 22

Sizing a water distribution system what distances have to be kept in mind

Answer 22

Total developed length most remote fixture to property line not longer than 90 metres

Question 23

After calculation the sum of fixture units needed for building what do you need to check

Answer 23

If there are any added demands from things such as a irrigation system or fire sprinkler system

Question 24

The intention of water distribution systems

Answer 24

Have all systems function in a manner that will provide adequate pressure and flow to all fixtures under any circumstance

Question 25

Piping from the hot water tank to a fixture less than ____ metres away will operate satisfactorily

Answer 25

30

Question 26

All hot water distribution systems that are more than 30 metres in developed length must have what

Answer 26

Have a re circ system or self regulating heat trace

Question 27

Shut off valve is required on supply line to every what fixture

Answer 27

Water closet

Question 28

If anything could contaminate building water such as hot water boiler with chemicals or glycol products

Answer 28

A second backflow preventer must be installed

Question 29

What can’t you bypass around

Answer 29

Backflow prevention

Question 30

Who states that an air gap will not be permitted on a fixture that is situated in a noxious environment

Answer 30

National plumbing code of Canada

Question 31

What percent of volume should an expansion tank be sized for a hot water heater

Answer 31

Should be sized to accommodate 5% of the tanks volume

Question 32

Where must the drains from water treatment devices be piped

Answer 32

Must be indirectly connected to the drainage system to prevent contamination of the filter bed and water passing through the filter bed

Question 33

These size valves for water service pipe can be stop and drain valves

Answer 33

3/4” 1”

Question 34

What size do they install water metres to allow a passage for a suitable amount of water without causing pressure loss

Answer 34

5/8s water meter

Question 35

Minimum size water service allowed to have a bypass arrangement around the meter

Answer 35

1 1/2” ( 38 mm)

Question 36

Air testing water distribution system what pressure and how long

Answer 36

100 psi and hold for 2 hours

Question 37

Water distribution systems can be found in what section of the national plumbing code of Canada

Answer 37

Section 2.6