IrrigationPregunta 6 de 100
A pressure vacuum breaker (PVB) must be installed at what minimum height relative to the highest downstream sprinkler head or outlet?
a.At the same level as the heads
b.6 inches above the highest head
c.12 inches above the highest head
d.36 inches below grade
Explicación
A pressure vacuum breaker must be installed at least 12 inches above the highest downstream outlet or sprinkler head so atmospheric venting works correctly against backsiphonage. It protects against backsiphonage only, not backpressure. Correct elevation is essential for the device to function.
Practica las 100 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- A zone has four heads each using 3 GPM covering a total area of 400 square feet. What is the approximate precipitation rate?
- Under California's Model Water Efficient Landscape Ordinance (MWELO), overhead spray irrigation is generally prohibited in landscape areas narrower than what width?
- A reduced pressure principle (RP) backflow assembly is primarily used to protect a potable water supply against what?
- An atmospheric vacuum breaker (AVB) has which key installation limitation?
- Water hammer in an irrigation system is BEST reduced by which measure?
- Which pipe material is MOST commonly used for buried irrigation mainlines under constant pressure in California?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con California CSLB C-27 Landscaping Trade Exam · Cómo revisamos