CID Domain 1: Equipment (40%) - Complete Study Guide 2026
If you only had one reason to study the Equipment domain hard, the math alone would give it to you.
CID Domain Deep Dives
Domain Deep Dives for the Certified Irrigation Designer (CID) exam - 6 in-depth guides to help you prepare with confidence. Browse all study resources or jump straight into a guide below.
CID Domain 2: Hydraulics (16%) - Complete Study Guide 2026
Hydraulics is the science of water under pressure moving through pipes, fittings, and emitters.
CID Domain 3: Scheduling (15%) - Complete Study Guide 2026
The Certified Irrigation Designer exam is built around six content domains, and Domain 3 - Scheduling - carries a 15% weight on the General...
CID Domain 4: Layout (15%) - Complete Study Guide 2026
Domain 4: Layout represents 15% of the Certified Irrigation Designer General Landscape/Turf exam administered by the Irrigation Association...
CID Domain 5: Electrical (7%) - Complete Study Guide 2026
Domain 5: Electrical sits at 7% of the CID General Landscape/Turf exam. That translates to approximately 10 to 11 questions out of 150 total, each...
CID Domain 6: Maintenance and Operations (7%) - Complete Study Guide 2026
Among the six domains tested on the CID General Landscape/Turf exam, Maintenance and Operations sits at 7% - tied with Domain 5: Electrical as the...
Ready to Pass Your CID Exam?
Put these guides into practice with free CID questions