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CR-21 Landscaping and Irrigation: Advanced Practice Exam With Correct Answers 2026/2027
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CR21 Landscaping
CR21 Landscaping
1. What is the primary cause of "Water Hammer" in an irrigation system? • A) High water temperature. • B) Air trapped in the pipes or valves closing too quickly. • C) Using the wrong color of PVC pipe. • D) Low water pressure at the street. • Correct Answer: B. A sudden change in water velocity creates a shockwave that can shatter plastic fittings and damage valves. 2. In Arizona, what is the required minimum depth for a 120V electrical conduit for a landscape lighting tran...
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