Mixed Deck — All C27 LICENSE Topics Flashcards

Under California Department of Pesticide Regulation (CDPR) rules, what is the general buffer zone requirement when applying pesticides adjacent to bodies of water?

Answer: Buffer zones vary by product label but applicators must follow label directions and applicable regulations to prevent water contamination

Buffer zone requirements are pesticide-specific and found on the product label; applicators must comply with label directions and state regulations to prevent pesticide runoff into water bodies.

Which turfgrass disease is characterized by roughly circular patches of brown or dead grass, often with a 'frog-eye' pattern?

Answer: Necrotic ring spot

Necrotic ring spot (Ophiosphaerella korrae) produces circular to ring-shaped patches of dead turf with a characteristic frog-eye pattern in the center.

What is the recommended soil amendment incorporation depth for turf removal and drought-tolerant replanting projects?

Answer: 6 inches

For turf replacement projects, soil amendments should be incorporated to a depth of 6 inches to meaningfully improve water retention, drainage, and root penetration.

When pouring a new concrete patio, a contractor forms or cuts shallow grooves into the slab at regular intervals. What is the main purpose of these grooves, known as control joints?

Answer: To provide a weakened plane that encourages cracking to occur in a straight line.

Control joints (or contraction joints) are intentionally created weak points in a concrete slab. As concrete cures and shrinks, it is prone to cracking. Control joints are designed to predetermine the location of these cracks, encouraging them to form in a neat, straight line along the groove rather than randomly across the slab's surface, thus maintaining structural integrity and appearance.

When constructing a segmental retaining wall, what is the term for the intentional backward lean or slope of the wall face designed to improve its stability against overturning?

Answer: Batter

The correct term is 'batter,' which refers to the designed, slight backward inclination of a retaining wall's face. This lean uses gravity to help the wall resist the lateral pressure of the soil it is retaining, increasing its overall stability. A common batter is 1 inch of setback for every 12 inches of height.

What does 'substantial completion' mean in a construction contract?

Answer: When the project is sufficiently complete for its intended use with only minor punch-list items remaining

Substantial completion is the point at which the project is complete enough for the owner to occupy or use it for its intended purpose, triggering key contractual timelines and rights.

If a landscaping project is broken into multiple phases, each costing less than $500, is a C-27 license required?

Answer: Yes, because the total cost of all phases combined exceeds $500.

If a landscaping project is broken into multiple phases, even if each individual phase costs less than $500, a C-27 license is required if the total combined cost of all phases exceeds $500. The Contractors State License Board (CSLB) views this as a single project intentionally divided to avoid licensing requirements. This prevents contractors from circumventing the law by segmenting larger jobs.

When grading a landscape to ensure proper surface drainage away from a building's foundation, what is the generally accepted minimum slope?

Answer: 2% (1/4 inch per foot)

A minimum slope of 2% is the standard recommendation for landscape areas to ensure positive drainage away from structures. This means the ground should drop at least 1/4 inch for every linear foot. This prevents water from pooling near the foundation, which can cause significant structural damage over time.

Which practice best supports California's goal of reducing potable water use in landscapes?

Answer: Using recycled (reclaimed) water for irrigation where available

Using recycled or reclaimed water for landscape irrigation reduces demand on potable water supplies and is encouraged or required in many California water districts.

A client's lawn has several irregular brown patches where the turf feels spongy and lifts up easily, like a carpet. An increased number of birds have also been seen digging in these areas. What is the MOST likely cause of this damage?

Answer: An infestation of grub worms.

The combination of irregular brown patches, spongy turf that pulls away easily from the soil, and increased animal activity (birds, skunks, raccoons) are classic signs of a grub infestation. Grubs are beetle larvae that feed on grass roots, severing them from the soil and causing the grass to die.

How often must a C-27 Landscaping Contractor License be renewed?

Answer: Every two years

A C-27 Landscaping Contractor License, like most contractor licenses in California, must be renewed every two years. This biennial renewal process ensures that the Contractors State License Board (CSLB) can regularly update its records and confirm that licensees continue to meet all necessary requirements and remain in good standing.

What additional step must be completed if the applicant has employees?

Answer: Submit proof of workers' compensation insurance.

If a C-27 license applicant plans to hire employees, they are legally required to submit proof of workers' compensation insurance to the Contractors State License Board (CSLB). This insurance protects employees in case of work-related injuries or illnesses, providing medical care and wage replacement benefits. It is a mandatory requirement for all employers in California to ensure employee safety and welfare.

A contractor is installing an interlocking paver patio. Which of the following is the PRIMARY purpose of edge restraints?

Answer: To prevent the bedding sand and pavers from shifting laterally.

Edge restraints are a critical structural component of an interlocking paver system. Their primary function is to provide lateral resistance, preventing the pavers and the underlying bedding sand from spreading or moving horizontally under load. This confinement is essential for maintaining the interlock between the paver units.

A C-27 contractor is preparing a residential site for a new lawn and patio. Before starting any excavation or grading, what is the first and most critical step to ensure safety and compliance with California law?

Answer: Call 811 (Underground Service Alert) to have all underground utilities located and marked.

California law mandates that anyone who plans to excavate must call 811 or use the online service at least two working days before digging. This free service arranges for utility companies to locate and mark their underground lines (gas, electric, water, etc.), preventing potentially dangerous and costly accidents.

Under California law, what is the maximum deposit a contractor may collect from a homeowner at the start of a home improvement project?

Answer: 10% of the contract price or $1,000, whichever is less

California Business and Professions Code Section 7159.5 limits contractor deposits to 10% of the contract price or $1,000, whichever is less, to protect consumers.

According to the California Building Code, a building permit is generally required for a retaining wall when its height exceeds a certain threshold, measured from the bottom of the footing to the top of the wall. What is this typical height?

Answer: 4 feet

The California Building Code generally requires a building permit for retaining walls that are over 4 feet in height. This measurement is taken from the bottom of the footing to the top of the wall. Walls supporting a surcharge (like a slope or driveway) may require a permit regardless of height.

An entire irrigation system is experiencing low water pressure across all zones. The controller is functioning, and the water supply to the property is confirmed to be normal. Which of the following is the MOST logical first component to inspect for a system-wide pressure issue?

Answer: The backflow prevention device.

Since the low pressure affects all zones, the problem must be located at a point common to the entire system, before the water is diverted to individual zone valves. The backflow prevention device is a primary component that, if a valve is partially closed or the device is clogged, will restrict flow and reduce pressure for the whole system.

What exams must be passed to obtain a C-27 Landscaping Contractor License?

Answer: Law and Business exam and a Trade exam.

To obtain a C-27 Landscaping Contractor License, applicants must pass two distinct exams: the Law and Business exam and a Trade exam. The Law and Business exam covers general contracting principles, regulations, and business management, while the Trade exam specifically tests knowledge of landscaping practices. Both are essential to ensure competence in both the operational and administrative aspects of contracting.

What is the purpose of a change order in a landscaping contract?

Answer: To document and authorize agreed-upon changes to the original scope, price, or timeline

A change order is a written document signed by both parties that modifies the original contract to reflect mutually agreed changes in work scope, cost, or schedule.

When installing a perforated pipe for a French drain, what is the correct orientation for the drainage holes?

Answer: Facing downward, to allow collected water to exit and be carried away.

The perforations or holes in a French drain pipe should be oriented facing downward. The purpose of the system is to collect water that rises from the saturated ground into the gravel-filled trench. The pipe, sitting at the bottom, then acts as a conduit to carry this collected water away. If the holes were on top, the pipe would have to fill completely before it started draining.