Quiz 1
The pressure rating is the maximum internal water pressure that can be exerted continuously in a pipe without damage. At approximately what specific water temperature is this rating?
73°F
A smaller capacity supply line runs from a mainline into your system. What should be placed on this line?
A water meter
Which two backflow prevention devices are approved for commerical applications?
Air gap and reduced pressure assembly
Which backflow prevention device is installed downstream of the irrigaiton valves?
Atmospheric vacuum breaker
Which of the following devices is typically used for residential irrigation applications?
Atmospheric vacuum breaker
Which of the following valves can open and close with a quarter turn?
Ball valve
Which of the following fittings to most compatible across various fitting manufacturers?
Compression fittings
What component sends a low voltage electrical signal that causes valves to open or close?
Controller
Which application device is rated in gallons per hour?
Drip emitters
Which valve controls the flow of water to a lateral with sprinklers or some other application device such bubblers or drip/micro?
Electric control valve
What is the happens when two dissimilar metals are plumbed together?
Electrolysis
Which of the following is a waxlike compound that dissolves when heat is applied and removes oxidation from the joint surfaces.
Flux
What process is used to fight against corrosion of steel pipes in irrigation systems?
Galvanizing
What type of valve is designed to be used in locations that require throttling as well as frequent on/off operations?
Globe valve
What is the term for positioning sprinklers so that the spray of one sprinkler reaches its neighboring sprinkler?
Head to head coverage
Which type of controllers are most commonly used today?
Hybrid controllers
Which water application device, made famous by the Rain Bird Company, uses a spring-loaded "arm" to rotate the sprinkler's stream?
Impact
Which application device is susceptible to both wind drift and plugged nozzles?
Micro sprayers
Fittings are manufactured to what pipe dimension?
Outside diameter
Which dimension is fixed regardless of the Class or Schedule for a given size pipe?
Outside diameter
Which of the following pipelines is typically to large for landscape irrigation systems?
PIP
What is the most popular irrigation pipe material used in the United States?
Polyvinyl chloride
Which pipe material is most commonly used below ground for landscape irrigation systems?
Polyvinyl chloride with IPS dimensions
What device can be used if the supply pressure fluctuates and the desired outlet pressure is below the fluctuation range?
Pressure regulator
When water is supplied from a well, pond, or storage tank, what device is required to pressurize the system?
Pump
Name the backflow prevention device that offers the highest level of protection.
Reduced pressure assembly
When chemical injection is necessary, what type of backflow prevention device should be used?
Reduced pressure assembly is most appropriate
Which of the following has the largest wall thickness for 4" PVC?
Schedule 80
Name the backflow prevention device that offers the lowest level of protection.
Single check valve
When a controller sends an electric signal to a valve box, which type of valve does it control?
Solenoid valve
Who should you talk to before selecting and installing a backflow prevention device for a project?
The agency responsible for cross-connection in the project area
Which statement is true about backflow prevention devices?
The backflow prevention device protects the domestic water supply from contaminated water re-entering the water source.
Who typically owns the water meter?
The water supplier
The working pressure is equal to the pressure rating:
minus the surge pressure and effects of warm water.
When a connection is made with the main supply line, this is referred to as the:
point of connection
The purpose of the water meter for residential purposes is to measure the:
volume of water used
