Quiz 1

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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


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