Self test questions: B-1 / B-2 Flashcards
How is potable water defined?
Water that meets the prescribed standards / is safe to drink / fit for domestic purposes w/o further treatment
How is water pipe defined?
a pipe that conveys water from a public water main or private water source to the inside of a building
True or False: water is a natural solvent
true
What is the name used to describe the water from a public water system after it has passed through the consumer’s service connection?
Used water
As water flows through a centrifugal pump, it slows down and the pressure does what?
increases
What information is required when using a performance curve to select a pump?
Pump head / pump capacity
What is the max static pressure allowed at a fixture before a PRV is installed?
80psi (550 kPa)
What is the purpose of series installation of PRV?
Two - stage pressure reduction
Where is a corporation valve installed?
On a municipal water main to permit joining of the water service pipe
When may a private water supply system be interconnected w/ a public water supply system?
No interconnection is permitted
What is the Hazen - Williams formula used to calculate?
Pressure drop caused by friction in pipe
How can ductile - iron pipe / fittings be joined?
push on, MJ / flanged joints
True or False: A push - on type joints uses a gasket that is installed in the spigot pipe end
False
When must PVC pipe be bevelled to match factory specifications?
For push on joints only
What methods are used to resist damage to underground piping from thrust forces?
Thrust block, thrust anchors and joint restraint
Which shut off valve is located on the water service, immediately inside the building?
Main stop and drain
Which water meter type is commonly used to measure / record small water flows?
Positive displacement (rotating disk meter?)
What will happen to an anode rod that is located in a hot water storage heater?
Decreases in size
What is the purpose of a service loop on a water service line?
to allow for settlement or mvmt of the the water main.
When does the code require that a check valve be installed on a water service pipe?
When the water rated pipe is rated for cold water only
What is a direct fired hot water heater?
The heating source is located at the hot water storage tank
Circ pumps on potable water systems must be what type?
bronze body
What is the recommended minimum required water temperature for domestic hot water storage?
60 C
Which type of water service pipe is not rated for hot water?
Polyethylene
Which condition would most likely cause water hammer?
Quickly closing a valve
Can a shut - off valve be installed on the pipe bn any tank / the relief valve , or on the discharge lines from the relief valve?
No
True or False: A water distribution system shall be installed so the system can be drained or blown out with air
True
Every fixture supplied w/ separate hot / cold water controls shall:
Hot on the left
Cold on the right
Which fixtures must have a shut off valve provided on the water supply pipe?
Water closets.
