Irrigation第 9 / 100 题
Which pipe material is MOST commonly used for buried irrigation mainlines under constant pressure in California?
a.Thin-wall aluminum
b.Schedule 40 PVC or Class 315 for pressure mains
c.Corrugated black flex tubing
d.Galvanized steel
解析
Buried pressure mainlines are commonly run in Schedule 40 PVC or an appropriate pressure-rated class of PVC because it handles constant pressure and resists corrosion. Lateral lines downstream of valves may use lighter class PVC since they are only pressurized during operation. Corrugated tubing is used for drainage, not pressurized supply.
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