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C-27 Silver Bundle

CSLB Landscaping (C-27): Study Guide and Online Practice Exam

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What’s included


What this covers

Per the state's classification, a C-27 contractor constructs, maintains, and repairs plots and areas of land including hardscapes, drainage systems, irrigation, planting, and retaining walls. This printed book covers the subjects the state tests. See the official CSLB C-27 classification.


Sample questionsTry our free practice test

  1. Why would you not want to waterproof a retaining wall?
    A. The water seeping through would discolor it · ✓ B. Water pressure would build up against the wall · C. It would become too wet on the low side · D. None of the above
  2. What drain design should you use when draining a large flat area?
    A. Grid · B. Parallel · C. Radial · ✓ D. Concentric circle
  3. For a two-story building, how deep in the soil must the footings be?
    A. 12" · B. 16" · ✓ C. 18" · D. 24"
  4. What is the cause if a ring of green lawn surrounds all of the sprinkler heads on a lawn?
    ✓ A. Excess water pressure · B. Wrong valve type · C. Mechanism is defective · D. Sprinkler head is too low
  5. After sowing a newly seeded lawn, a thorough soaking is necessary and after that it should be watered:
    A. once per day · B. morning and evening · ✓ C. with a light sprinkling by hand applied 3 to 4 times a day · D. once a week
  6. After the grass seed has germinated, the watering schedule should be adjusted:
    A. to gradually increase · ✓ B. to gradually decrease · C. by not watering until ready to mow · D. by watering heavily until ready to mow

California contractors who passed

Irrigation math was my weak point. After maybe six practice tests it finally clicked.

Efrain Costa Mesa, CA  · Landscaping (C-27)

The drainage questions surprised me, but the guide has diagrams of the systems and I had studied them. Passed.

Scott Dana Point, CA  · Landscaping (C-27)

Two exams, one month, both passed. The practice tests told me when I was ready.

Ismael Concord, CA  · Landscaping (C-27); Law & Business